Dive Teams Depend on Detection Devices JW Fishers Metal Detectors

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Dive Teams Depend

on Detection Devices

Clockwise from top left; Louisville Fire Dept dive team members with their Fisher side scan, Washtenaw County Sheriff’s diver with Pulse 8X, Rochester Police dive team member with their SCAN-650 sonar, Chief David Pease of REDS Team with Pulse 6X and recovered handgun.
     Public safety dive teams depend on sonars, ROVs, and underwater metal detectors to accomplish their underwater search operations safely and effectively. When a New York man accidentally fell from a concrete ledge into the Genesee River, the Rochester Police dive team was immediately dispatched. To save time, the incident commander made the decision to deploy a SCAN-650 scanning sonar recently acquired from JW Fishers Mfg. The sonar transmits a sound wave that sweeps a circle up to 200 feet in diameter. The wave bounces off any object on the bottom and the return signal is sent topside where it produces an image on a laptop computer showing the operator exactly what’s down there, regardless of water clarity. Officer Paul Romano reported, “We set up the SCAN-650 and found a target relatively quickly. A diver was splashed and confirmed it was the victim. The sonar was instrumental in helping make a fast recovery.”
Another sonar being used by many teams including the Alaska State Troopers, Louisville Fire Department in Kentucky, and Bingham County Search and Rescue in Idaho is side scan. Instead of deploying the device from a stationary position like the SCAN-650, the side scan sonar is towed behind the boat and scans hundreds of feet of ocean, lake or river bottom with each pass of the vessel allowing a large area to be searched in a very short time. Encompassed within Bingham County is 26 square miles of water including the Snake River and the American Falls Reservoir. This summer proved to be an especially treacherous one on Idaho’s waterways with 7 people drowning since Memorial Day. To assist in their recovery operations the county’s search and rescue group, in conjunction with the Bingham County Sheriff Department, recently acquired a JW Fishers SSS-600K side scan. This sonar will locate anything from a drowning victim to a sunken vessel. The image displayed on the topside computer looks as if the water has been removed and the operator is seeing everything on the bottom. In Alaska there are thousands of square miles of ocean surrounding the state, and many lakes and rivers scattered across its interior. Much of this water is frozen for a good part of the year. Alaska State Troopers must have the ability to respond to a variety of emergencies whether its a vehicle going off the road into water, or a ski mobile disappearing though the ice. The agency acquired both a SCAN-650 scanning sonar and the SSS-600K side scan for their varied call outs. The scanning sonar is easily deployed through a hole in the ice and scans a large diameter circle on the bottom, a task that would be dangerous and time consuming for divers. The towed side scan is employed when large areas of open water need to be searched. When a target appears on the computer screen, the operator simply clicks the mouse on the object and the GPS position is displayed, making it easy to relocate and recover the target.
In Missouri the Highway Patrol handles more water-related incidents than any other agency. Each year their dive team conducts an average of 55 underwater operations to recover the victims of drownings and boating accidents, or to retrieve evidence for criminal felony cases. Team members utilize underwater metal detectors, remote operated vehicles, sonars, and underwater video systems to help locate and photograph evidence. Included in their equipment locker is a JW Fishers SeaOtter-2 ROV, a TOV-1 towed video system and a Pulse 8X metal detector which is an essential tool for locating evidence disposed of in a waterway. Many criminals mistakenly believe if they dispose of gun or knife in a waterway, it will be lost forever. But police divers routinely prove them wrong by finding weapons, shell casings, stolen objects, and explosive devices with the Pulse 8X.
Two other groups that have discovered the effectiveness of underwater metal detectors are North Carolina’s REDS Team, a non profit group consisting of Rescue, Extrication, and Delivery Specialists, and the Washtenaw County Sheriff’s Office Dive Team. David Pease, chief of the REDS Team, said their JW Fishers Pulse 6X detector helped locate a gun for their local police department. Washtenaw dive team member Sgt. Paul Cook reports, “we have used the Pulse 8X with excellent success locating many items for evidence including spent cartridge casings, weapons, and property. It’s a valuable piece of our kit and we’d be lost without it.”
A few of the many other agencies using JW Fishers search equipment are South Carolina’s State Law Enforcement Division (SLED), Suffolk County Sheriffs Marine Unit in New York, Royal Canadian Mounted Police Underwater Recovery Team, Miramar Police Dept in Florida, Gallatin County Rescue in Montana, the US Air Force Rescue Squad, US Border Patrol, Los Angeles Port Police, Monmouth County Sheriffs Office in New Jersey, Wichita Falls Police Dept and Laredo Fire Dept in Texas, and Boston Police Special Operations Unit.

JW Fishers SeaOtter-2 ROV

  JW Fishers SeaOtter-2 and SeaLion-2 are state of the art ROV systems with sophisticated four motor propulsion, front and rear facing video cameras with both pan and tilt capability, front and rear lights, and a topside control console with flat screen display built into a rugged waterproof case. These ROVs are the ideal tool for pipeline inspections, river and ocean searches, dam inspections, oil and gas platform work, aquaculture observation, inspections in hazardous environments, use by law enforcement and public safety dive teams, and military ops. The more-powerful SeaLion-2 has a 1,000 foot depth rated housing and 15.4 inch flat screen  display.  The more economical SeaOtter-2 has a 500 foot depth rated housing and 10.4 inch display.
Options for these ROVs include scanning sonar, a metal detector, manipulator arm, longer umbilicals, two side cameras, text overlay, computer control, and built-in DVR digital video recorder.
To receive a detailed technical data sheet with all specifications go to www.jwfishers.com or send an email request to info@jwfishers.com.

JW Fishers Side Scan Sonars

   JW Fishers sonars offer a number of advantages over other low cost side scan systems. Some of these are; a larger towfish for greatly increased stability of the transducers, sophisticated software, the ability to have two sets of transducers in one towfish, and the capability to operate with cable lengths up to 1,000 feet. feet.
The quality of the images produced by any side scan system is directly related to the stability of the platform that moves the transducers through the water. Many low cost side scans have a small towfish. The drawback of a small fish is that it can easily be tossed about by underwater currents or affected by movement of the boat due to wave action which can be transmitted down the cable. This leads to poor quality images from the unstable movement of the fish. Fishers four foot long towfish provides an extremely stable platform for the transducers. The fish moves through the water like an arrow through air, which produces high resolution images.
The quality of the software, which is the “brains” of a sonar system, is another feature that differentiates Fishers side scan from other low cost systems. Fishers SONAR VIEW software has a vast array of features that gives the operator tremendous versatility in displaying and manipulating the sonar data coming up from the towfish. In addition, optional mapping software allows the operator to see the track of the boat as it travels over the search area and the size of the area being scanned, ensuring no part of the search area is missed. During playback the track can be overlaid onto a nautical chart showing the exact location of the search operation.
Many low cost side scan systems are available in only one frequency, or have different towfish for different frequencies. To change frequencies requires “reeling in” one towfish and then deploying another, an arduous and time consuming operation.
JW Fishers offers three frequencies; 100K, 600K, and 1200K. Side scans are available in either single or dual frequency, with the customer selecting which frequency or frequencies they require. In Fishers dual frequency side scan there are two sets of transducers in one towfish. This allows the operator to quickly and easily switch between frequencies at any time during operation. Lower frequencies have longer range, but lower resolution, Higher frequencies have a shorter range, but higher resolution. 
   The typical ratio of cable length to tow depth is 4 to 1. This means to tow the side scan fish at a depth of 100 feet requires 400 feet of cable. Some low cost systems have a limited length of cable they can operate with. Fishers sonars can work with cable lengths up to 1,000 feet. This means they can be towed at a depth of 250 feet. When coupled with the optional DDW-1 deep dive wing, Fishers side scans can be towed at depths up to 500 feet, which is beyond the depth capability of many of the small systems.
   To receive a detailed technical data sheet with all specifications go to www.jwfishers.com or send an email request to info@jwfishers.com.         

JW Fishers Pulse 8X metal detector

  The Pulse 8X comes with everything needed for land and underwater metal detecting. JW Fishers detectors are commercial-grade machines that work equally well on land and underwater. This detector will locate a variety of targets including jewelry, coins, shell casings, weapons, gold bars, anchors, ordnance, cannons, and pipelines. The Pulse 8X uses state-of-the-art Pulse Induction technology to detect all metals, ferrous and nonferrous, while ignoring mineral in the environment such as salt water, coral, black sand, and high-iron rocks. Fishers detecors are not affected the material betweeen the metal object and the search coil. The detection range remains the same whether detecting through air, water, silt, sand, mud, or rock.
The Pulse 8X has both visual and audio readouts. Audio is provided by an underwater earphone that tucks under the mask strap or into a diver’s hood. The visual output is displayed on a large, easy to read meter. The 8X comes with a complete accessory package that has everything needed to use it on land, in the surf, or diving to depths of 200 feet. Included in the kit.  Included in the kit are land and underwater earphones, a high-impact PVC handle for underwater use, an anodized aluminum handle for land use, AC battery charger, DC battery charger, hip-mount kit, and a heavy duty cordura nylon carry bag. Rechargeable batteries power the detector for 12 full hours. Batteries can be easily field replaced to provide around the clock operation.
One of the most unique features of Fishers detectors is the complete line of interchangeable coils available. The range includes a probe coil, 5 inch coil, 10 inch coil, 16 inch coil, 18 inch coil with 100 foot cable for boat deployment, and an 8 x 48 coil coil that is mounted on 4 small skis for dragging on the beach or in shallow water.
For more information on the Pulse 8X go to www.jwfishers.com and click on the Products tab at the top of the page, then click on hand-held metal detectors and Pulse 8X.

To request a catalog on JW Fishers complete line of underwater search equipment go to www.jwfishers.com or send email to info@jwfishers.com.
JW Fishers Mfg. Inc.
1953 County Street
East Taunton, MA 02718 USA
PH: (800) 822-4744, (508) 822-7330
FAX: (508) 880-8949
EMAIL: info@jwfishers.com
WEB: www.jwfishers.com
You are receiving our emails because you opted in at our website, are a current customer, or have expressed an interest in receiving our occasional communications.  You can opt out at any time by clicking  “unsubscribe”  at the bottom of this email.
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Acoustic Pingers Help Contestants JW Fishers Metal Detectors

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Acoustic Pingers Help Contestants

<>< in Robosub Competition ><>

Members of NCSU Underwater Robotics Club with Seawolf,
Inset – Shanghai American School students with their AUV “Nerwin Jr.”.
 The Robosub competition was started 18 years ago to advance the development of Autonomous Underwater Vehicles (AUV). Co-sponsors are the Association of Unmanned Vehicle Systems International (AUVSI) and the U.S. Office of Naval Research (ONR). The goal is to challenge a new generation of engineers to accomplish realistic missions in an underwater environment and get young people excited about careers in science, technology, engineering and math. The hope is that Robosub will inspire these young men and women to pursue STEM careers, and create opportunities to enter the rapidly expanding field of maritime robotics.
Teams from high schools, colleges, and universities from around the world compete in this annual event. Participants learn how to work together to create an autonomous system that will accomplish a variety of challenging tasks. The underwater vehicles they construct must navigate a complex course which involves visual and acoustic sensing elements, small and large object manipulation, dropping markers into specific bins, and launching torpedoes at particular targets; all without human control or intervention. Points are awarded for the number and difficulty of the tasks successfully completed.
One returning competitor is North Carolina State University Underwater Robotics Club, a student run organization that designs and builds autonomous submersibles. Their vehicle Seawolf was designed to be capable of maneuvering through an underwater obstacle course, retrieving and dropping payloads, and navigating to locations marked by an acoustic pinger.  To test their vehicle’s ability to maneuver to an acoustic beacon, the team needed a pinger for trials. They choose JW Fishers SFP-1 single frequency pinger for its low cost, and because its specifications met the Robosub requirements. The SFP-1 transmits a preset frequency between 22 and 37.5 kHz which can be detected at a distance of several thousand feet.
A newcomer to Robosub is the SASAUV team from Shanghai American School, an international high school based in China. Their group is divided into three parts, each responsible for different tasks; navigation and software, hardware, and multimedia. At a time when many modern AUVs are exploring new and sometimes radical exterior designs, their design philosophy is the underwater vehicle should have the shape of a conventional submarine. To accelerate the development of the AUV’s acoustic sensing capability, the team used parts of JW Fishers PR-1 pinger receiver, a device that finds acoustic pingers and guides the operator to the pinger’s location. Team captain Kylin Daniel reported, “The equipment JW Fishers supplied was absolutely phenomenal to work with, and we plan on using additional equipment from Fishers next year.” He went to say, “Although we were unable to accomplish all of the required tasks, our team still managed to score more points that many notable college teams. This project has given us high schoolers an incredible experience, and we look forward to competing again in the future.”
Other teams using Fishers acoustic devices to help design their AUVs for Robosub are from Kasetsart University in Thailand, University of Colorado Boulder, National University of Singapore, and India’s Underwater Robotics Society. Other educational institutions using Fishers pingers in their projects are the University of Delaware, University of Texas Austin, University of South Florida, Texas A&M, Lester B. Pearson College, Inha University in China, Coastal Carolina University. Louisiana State University, and Pukyong National University in Korea.
For info on the Robosub competition go to www.auvsifoundation.org. For more information on JW Fishers complete line of underwater search equipment go to www.jwfishers.com.

JW Fishers SFP-1 & MFP-1 Pingers – available in 3 different size housings

  JW Fishers family of commercial-grade pingers include the SFP-1 single frequency pinger and MFP-1 multifrequency pinger. The SFP-1 is available in five frequencies; 22, 26, 30, and 37.5 kHz. The MFP-1 has user select-able frequencies from 20 to 50 kHz in 500 Hz increments. This allows the operator to choose which of the 60 different frequencies to use before deployment. Pingers at different frequencies can be deployed in the same general area and each can be individually located using the pinger receiver. With Fishers pingers the operator can customize functions to meet their requirements. Operator adjustable features include; number of pulses per second, the length of time each pulse is transmitted, and the output power. Power for the pingers is supplied by standard alkaline batteries which last from a few days to many months depending on output power and pulse length selected. Optional larger housings significantly extend operating time. The Very Long Duration Housing can operate for years. The pinger can be set for automatic activation when submerged or manually activated before deployment.
The new low frequency pinger with significantly longer transmission range is available in frequencies between 11 and 16 kHz in 1 kHz increments. It is powered by (12) 9 volt alkaline batteries. Options include factory set frequency between 11 and 16 kHz in 0.1 kHz increments. Pulse rate, repetition rate, and delayed start time can be preset using your computer. Fishers pingers are constructed of high-impact corrosion proof PVC and are depth rated to 1,000 feet.
All of Fishers pingers are backed by a 2 year warranty.

JW Fishers PR-1 pinger receiver

  The PR-1 is a highly advanced receiver capable of locating any pinger transmitting a frequency between 3 kHz and 97 kHz. It can be carried by a diver or deployed from a boat (with optional boat-deployment kit). To operate the PR-1 the diver sets the frequency of the receiver to the same frequency being transmitted by the pinger. The diver then sweeps the receiver over the underwater terrain until it receives a signal. The received signal lights up LEDs on the PR-1 and an audio alarm alerts the diver. A compass on top of the receiver shows the diver the direction to the broadcasting pinger. As the diver follows a course to the pinger the signal gets stronger and more LEDs light up on the PR-1 control panel. The audio alarm also get louder. To locate another pinger in the same area, the diver simply turns a switch on the control panel to the new frequency and repeats the process. The PR-1 runs on an internal NiCad battery pack that powers the receiver for 30 continuous hours. The PR-1 comes with underwater earphone and 120 volt AC charger. Options include a carrying case, dual underwater earphones, a 220 transformer, and the boat-deployment kit with hydrophone. The complete system is back by Fishers 2 year warranty. 

To request a catalog on JW Fishers complete line of underwater search equipment go to www.jwfishers.com or send email to info@jwfishers.com.
JW Fishers Mfg. Inc.
1953 County Street
East Taunton, MA 02718 USA
PH: (800) 822-4744, (508) 822-7330
FAX: (508) 880-8949
EMAIL: info@jwfishers.com
WEB: www.jwfishers.com
You are receiving our emails because you opted in at our website, are a current customer, or have expressed an interest in receiving our occasional communications.  You can opt out at any time by clicking  “unsubscribe”  at the bottom of this email.
Best prices A&S Co 1 408 248 1233
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Fisher F44 Metal Detector with 11 inch coil

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Fisher F44
The Ultimate Weatherproof Multi-Purpose Metal Detector

  • Weatherproof
  • Operates on 2 AA Batteries (25-30 Hours)
  • Fe-Tone® (Adjustable Iron Audio)
  • Ground Grab® Computerized Ground Balancing
  • Manual Ground Balance
  • 9-Segment Visual Target-ID
  • Large 2-Digit, 1-99 Numeric Target-ID
  • Iron Identifier Icon
  • Backlight for Low Light Conditions
  • 5 Modes of Operation: JEWELRY, COIN, ARTIFACT, CUSTOM, ALL METAL
  • Pinpoint
  • 20 Levels of Adjustable Sensitivity
  • 20 Levels of Adjustable Volume
  • 4-Tone Audio-ID
  • Non-Volatile Memory Saves Settings
  • 11-Inch Concentric Elliptical Waterproof Searchcoil
  • Ultra-lightweight Only 2.3 lbs. Operational Weight
  • 7.69 kHz. Operating Frequency

Recommended for:
Inclement Weather Hunting
Beach Hunting
Coin Shooting
Jewelry Hunting
Relic Hunting

Call 408-248-1233 for the best price fast free ship

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Fisher F22 metal detector with standard 9 inch coil

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Fisher F22
Weatherproof All-Purpose Metal Detector

  • Visual Target-ID by Category
  • Weatherproof
  • Operates on 2 AA Batteries (25-30 Hours)
  • Fe-Tone® (Adjustable Iron Audio)
  • Iron Identifier Icon
  • 9-Segment Visual Target-ID
  • Large 2-Digit, 1-99 Numeric Target-ID
  • 4 Modes of Operation: JEWELRY, COIN, ARTIFACT, CUSTOM
  • Pinpoint
  • 10 Levels of Adjustable Sensitivity
  • 20 Levels of Adjustable Volume
  • 4-Tone Audio-ID
  • Non-Volatile Memory Saves Settings
  • 9-Inch Concentric Elliptical Waterproof Searchcoil
  • Ultra-lightweight Only 2.3 lbs. Operational Weight
  • 7.69 kHz. Operating Frequency

Recommended for:
Inclement Weather Hunting
Beach Hunting
Coin Shooting
Jewelry Hunting
Relic Hunting

Please call 408 248 1233 for the best price

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Tesoro TIGER SHARK Metal Detector OPERATOR INSTRUCTION MANUAL

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Tesoro TIGER SHARK Metal Detector OPERATOR INSTRUCTION MANUAL
 


 

CONGRATULATIONS!

Your new TESORO metal detector was designed to provide you with many happy hours of enjoyment in the most rewarding hobby I can think of – treasure hunting. Ahead of you lie fascinating and exciting experiences as you step into the past, uncovering artifacts lost by past generations. I wish we could share these experiences with you, and we wish you the best of success.

Your Tesoro metal detector is capable of meeting your needs in a wide range of treasure hunting situations. As with any detector, operator and familiarity is probably the limiting factor in determining how successful you will be. We recommend that you read and understand this manual fully before attempting to use the instrument in the field. Then, as you practice and become familiar with your detector, your rate of success will increase dramatically.

Your TESORO metal detector is a precision electronic instrument, which will last for years if properly cared for. Treat it right and it won’t let you down.

 

 

 


GENERAL DESCRIPTION

The Tiger Shark uses microprocessor technology to create a true dual function machine. In Normal Mode, the Tiger Shark works like any other Tesoro detector. It uses the same great ground balance and discrimination features that made the Bandido and Eldorado series so successful. On land, the Tiger Shark can be used for coin and relic hunting and even gold prospecting. By using the four controls on the outside, you can fine tune your detector to handle whatever conditions you are working in.

We all know that working in the wet salt areas is different than working in any type of dry area. This is where the Tiger Shark outshines the land detectors. In land conditions, the most crucial adjustment is using the ground balance to tune out mineralization. In wet salt conditions, changes in the conductivity in the sand cause most of the problems. The Tiger Shark uses a completely different set of internal settings in the SALT Mode than in the NORM Mode. There are no special controls or techniques to remember. When working on a salt water beach, just switch to SALT Mode, adjust the Ground Balance and start hunting.

The Tiger Shark continues in the tradition of other great Tesoro underwater machines by having interchangeable coils available. Along with the 8″ coil that comes standard with the detector, we also manufacture a 7″ and a 10 1/2″ coil. To see if one of these coils is right for you, ask your local dealer or check the section in this manual titled “Selecting the Right Searchcoil.”

 


UNPACKING THE BOX

Your Tiger Shark was shipped with these parts:

1 Upper Pole Assembly

Fully assembled, including upper pole stem with handle grip, padded arm bracket, and pole lock.

1 Control Housing With Headphones Attached

1 Middle Pole Assembly With Pole Lock

1 Lower Pole Assembly

Fully assembled with 2 washers and nylon nut and bolt.

1 8” round printed spiral searchcoil with 8′ cable

1 8-cell battery pack with 8 AA batteries installed

1 Tube of Dow Corning #4 silicone

2 Velcro cable straps

1 Operator Instruction Manual

1 Tesoro Warranty Card

If any of these items are missing, contact the Tesoro Authorized Dealer where you purchased your detector immediately.


ASSEMBLING YOUR DETECTOR

    1. On the lower pole assembly, remove the mounting screw and thumb nut from the black nylon pole tip.
    2. Insert the pole tip between the mounting ears of the searchcoil and align the holes of the pole tip and washers with those of the mounting ears.
      Note: The pole tip should fit very snugly into the mounting ears.
    3. Insert the mounting screw through the holes in the mounting ears and pole tip entering from the side opposite the cable connection.
    4. Install the thumb nut on the mounting screw and tighten by hand.
      Note: Do not overtighten the thumb nut. It should be snug, but not too difficult to loosen up.
    5. On the middle pole assembly, depress the two spring buttons and slide the middle pole assembly into the upper pole assembly until the spring buttons click into the holes, thus locking the two assemblies into place. Tighten the pole lock to secure the two assemblies together.

 

 

  1. Slide lower pole into middle pole until spring buttons click into the first set of adjustment holes. Turn pole lock to tighten, thus locking the assembly into place.
  2. The Tiger Shark can be assembled in several different configurations. Take a look at the pictures below to find out the best configuration for you:Control housing mounted under arm

    Control housing mounted under pole

    Divers setup (lower pole set directly into upper pole)

    Body Mount

    Converting the Tiger Shark from pole mount to body/belt mount is simply a matter of removing the control box from the upper pole and unwinding the cable. To remove the control box from the pole, depress the four spring buttons that hold the mounting bracket and control box to the pole and lift. It is easiest to release one set of spring buttons at a time.

  3. Once you have decided on a pole mount configuration, wrap the cable around the pole leaving enough slack near the searchcoil to permit searchcoil adjustment.
    Install the coil connector into its receptacle on the back of the control housing and tighten it fingertight.

Note: Do not use pliers to tighten the coil connector. Do not allow the cable to flop loosely over the searchcoil. Since the detector is sensitive enough to “see” the tiny wires in the cable, a floppy cable can cause false signals as the searchcoil senses the moving wires.

 


BATTERY INSTALLATION / REPLACEMENT

The Tiger Shark has been equipped with a drop-in battery pack. To install or replace the batteries, make sure the detector housing is dry, then release the two draw bolts securing the faceplate to the housing. Gently pull the control panel free being careful not to twist or strain the ribbon cable connecting the faceplate panel to the printed circuit board. The Tiger Shark takes 8 AA size alkaline batteries. Also, make certain that you follow the polarity indicators on both the battery holder as well as the batteries themselves. Then check the polarity of the pack as it goes into the housing. Look inside the housing for the two spring clips and slide the pack so that the battery pack terminals meet the spring clips. There is only one correct way to put the battery pack in. If the batteries are put in wrong, the detector will not work. Replace the faceplate and use the drawbolts to clamp the faceplate back onto the housing.

Do not rest the unit on the coil connector while clamping the faceplate. This can cause excess wear and damage to the connector.

IMPORTANT NOTE: Always make sure the instrument is dry before opening. Water, if allowed to make contact with the circuit board, may damage it. Always make sure the O-ring is clean and free of dirt or sand. It is recommended that you wipe the O-ring with a dry cloth and look for damage and apply a new coat of diver’s silicone grease before replacing it. Failure to maintain the O-ring will result in extensive damage and will not be covered under warranty.


ADJUSTMENT

The searchcoil angle and stem length should be adjusted so that the unit does not become uncomfortable or tiring to hold after long periods of use. The detector should rest in your hand with arm relaxed allowing it to swing back and forth without having to lift with the elbow or shoulder while keeping the searchcoil as close as possible to the ground without touching. The pole length is adjusted by depressing the spring buttons and extending or shortening the lower stem until they click into the set of holes that give you the most comfortable setting. The searchcoil should rest about one inch above the ground while standing erect. Adjust the angle of the searchcoil so that it is parallel to the ground. Tighten the searchcoil thumbnut by hand so that the searchcoil will maintain this setting.


QUICKSTART TEST AND TUNING PROCEDURES

The Quickstart is designed to teach you how to use your new Tiger Shark. It provides a quick and easy means of learning your detector and the concepts behind all of the functions.

Important Note:

The Tiger Shark has two very different modes of operation. Normal is used for dry land hunting or fresh water hunting. Salt Mode is for wet salt sand and salt water hunting only. The modes cannot be interchanged. When you switch modes, you are actually changing the internal setup of your Tiger Shark. Please be very aware what mode your detector is in while you are hunting.

The controls for the two separate modes on your Tiger Shark operate almost exactly the same. As you follow the Quickstart, it will be assumed that you are operating in the Normal Mode. Any differences between the Normal and Salt Modes will be noted. You may want to go through the Quickstart in Normal Mode first and then repeat it using the Salt Mode.

You will need the following items:

  1. Your fully assembled Tiger Shark Detector.
  2. An iron target (a small nail or screw will do), a nickel, a pull tab and a quarter.
  3. A fine jeweler’s screwdriver.
  4. A nonmetal table or counter surface.

Here’s what you will do:

  1. Perform an Audio Battery Test.
  2. Set Ground Adjust.
  3. Perform Air Test in ALL MET Mode.
  4. Check and Set the Internal Controls.
  5. Perform Air Test in MOTION DISC Mode.
Prepare for the Quickstart

Place your assembled Tiger Shark on the nonmetal surface as shown in the photo below. Make sure there are no metal objects near the coil and remove any jewelry from your hands and wrists.

Start with the controls like this:

  1. Mode in the OFF position
  2. TUNE SPEED in the ALL MET FAST position
  3. DISC LEVEL at MIN
  4. GROUND ADJUST at 12:00
Perform Audio Battery Test

Turn the Mode Switch from OFF to NORM (if you are doing this test for the Salt Mode, switch from OFF past NORM and directly into SALT). This will turn on the detector and will give you a number of beeps. If the batteries are fully charged, you will hear 6 or 7 beeps. As the batteries drain, you will hear fewer and fewer beeps. When you hear one or two beeps, it will be time to replace your batteries.

After the beeps are done, you will hear a slight humming sound. This is the threshold tone. Its purpose is to give you a reference point to judge targets by. Some targets may be small enough or deep enough that they will not be able to generate an audio signal by themselves. By monitoring a threshold, you already have a signal so changes in that signal will be easier to hear. However, if the threshold is set too loud or too soft, small changes in the signal will be hard to hear. We will be talking about changing the threshold tone a little later.

Set Ground Adjust

We will now set the GROUND ADJUST for the air test. This method is only for the Quickstart tests. See the section “Ground Balancing Your Tiger Shark” for the correct procedure for ground balancing your Tiger Shark in the field. Please note that the NORM and the SALT Modes work at different ends of the GROUND ADJUST knob.

Ground balance for the NORM Mode: Turn your GROUND ADJUST knob clockwise or towards the positive side for 5 full turns. This will take you past the end range of the GROUND ADJUST potentiometer. The knob has no end stops, but you may notice a very slight increase in the drag of the knob as it passes the 3 and 3/4 mark. By turning the knob 5 full turns clockwise, we are assured that the GROUND ADJUST is in the very farthest positive position. Once you are at the positive position, turn the GROUND ADJUST knob a 1/2 turn counterclockwise or towards the negative side. This is an air test position only that will let you proceed with the rest of the Quickstart.

Ground balance for the SALT Mode: Turn your GROUND ADJUST knob counterclockwise or towards the negative side for 5 full turns. This will take you past the end range of the GROUND ADJUST potentiometer. The knob has no end stops, but you may notice a very slight increase in the drag of the knob as it passes the 3 and 3/4 mark. By turning the knob 5 full turns counterclockwise, we are assured that the GROUND ADJUST is in the very farthest negative position. Once you are at the negative position, turn the GROUND ADJUST knob 1 turn clockwise or towards the positive side. This is an air test position only that will let you proceed with the rest of the Quickstart.

Perform Air Test in ALL MET Mode

Once you have set the GROUND ADJUST for the Quickstart, you are ready to perform an air test in the ALL MET Mode. You will notice that there are two ALL MET positions – ALL MET FAST and ALL MET SLOW. These positions refer to the speed at which your threshold tone retunes itself. The ALL MET FAST should retune in about 1 to 2 seconds after a target response, whereas the ALL MET SLOW may take 4 to 6 seconds to retune.

Leave your detector in the ALL MET FAST position and wave any of your test targets 2 to 3 inches in front of the coil. Notice that you will have a positive response as the target passes the center of the coil and that the signal will fade away to silence after the target is past the coil. The threshold tone should come back in 1 to 2 seconds. Now move the TUNE SPEED switch into the ALL MET SLOW and try waving your targets again. You should notice a very distinct difference in the amount of time that it takes for the threshold to retune. ALL MET FAST will be used most often to quickly pinpoint targets. ALL MET SLOW is used to pinpoint deep or small targets that do not create much of an audio signal or for tracing the outlines of large targets.

Please return your TUNE SPEED switch to the ALL MET FAST before continuing with the Tiger Shark Quickstart.

Check and Set the Internal Controls

There are three controls that are located on the inside of the detector. The Volume control, the Sensitivity control and the Threshold control. All of these controls have been set at the factory for optimum performance in most conditions. However, if there is some need to fine tune these controls, you will need to open the waterproof case to perform the adjustments. We recommend that you do this on a clean dry surface (a clean beach towel that is spread out will do fine). When you are done with the adjustments, visually inspect both the control box and faceplate making sure that no sand or other contaminants have gotten onto the O-ring as it may cause leaks.

When you open the detector case, it will release the batteries from the contacts and cause the detector to stop functioning. While you are making adjustments, it will be necessary to place a slight pressure on the battery pack to make the detector work. When you reconnect the batteries to the contacts, the automatic battery test will be heard. Once the case is open, reach over the top of the detector with your left hand (or right if you are left-handed) and gently press the batteries onto the contacts. Use your fine jeweler’s screwdriver to adjust the potentiometers inside the case.

If you would like to set the internal controls, please continue with this section of the Quickstart. If you would prefer not to set the internal controls, please switch the TUNE SPEED to MOTION DISC and skip down to the section marked “Perform Air Test in MOTION DISC Mode.”

Setting the Volume control: The Volume control is the only potentiometer that is located on the printed circuit board. To adjust your Volume control, open the case and put a slight pressure on the battery pack. After you hear the battery test you will be able to adjust the volume that you hear in the headphones to a comfortable level. Use your screwdriver and turn the potentiometer clockwise for more volume and counterclockwise for less volume. Take some time and find the most comfortable level for you.

Setting the Threshold control: The Threshold control is located on the back of the faceplate/switch set and is the potentiometer closest to the edge of the faceplate. As explained in the “Perform Audio Battery Test” section, the threshold is a slight steady tone that is used as a reference point to judge targets by. Some targets may be small enough or deep enough that they will not be able to generate an audio signal by themselves. By monitoring a threshold, you already have a signal so changes in that signal will be easier to hear. However, if the threshold is set too loud or too soft, small changes in the signal will be hard to hear. To adjust your Threshold level, open the case and put a slight pressure on the battery pack. After the battery test, use your screwdriver to turn the potentiometer clockwise to increase the threshold tone and counterclockwise to decrease the threshold tone. Take some time to find the best threshold tone for you.

Setting the Sensitivity control: The Sensitivity control is on the back of the faceplate/switch set and is the closest to the center of the faceplate. To set the Sensitivity control, you must first switch to MOTION DISC. The Discriminate circuit uses a silent search mode meaning that no sound will be heard until the coil goes over a target. The most common use of the detector will be to hunt in the MOTION DISC Mode and then switch to an ALL MET Mode to pinpoint a target. This will give you the advantage of ignoring unwanted targets and not having to listen to the threshold hum until you are ready to recover a target.

The ALL MET circuit uses a single channel to detect various metals. The MOTION DISC circuit uses two different channels, then amplifies and filters the signals, and then compares the two to determine whether or not to beep at a target. While this is a great advantage for ignoring unwanted targets, it can make the circuitry more susceptible to interference. A number of outside conditions such as power lines, highly mineralized soil and wet salt sand can cause interference. The Sensitivity control is used to raise or lower the power to the operational amplifiers, which changes the gain. Gain is the measurement of how much a signal is amplified. The higher the gain, the more depth and sensitivity to small objects a detector has. Unfortunately, any small interference that is amplified can cause the detector to become erratic. The Sensitivity control is used to find the best gain setting in any location without letting the detector become unstable.

Turn the TUNE SPEED switch from ALL MET FAST to MOTION DISC. With the case open, place a slight pressure on the battery pack and wait for the battery test to finish. When the battery test is done, you will not hear any sounds in your headphones until you pass a target in front of the coil. Using your screwdriver turn the potentiometer clockwise to increase the gain and counterclockwise to decrease the gain. Take some time to try waving targets in front of the coil with different sensitivity settings. Notice that with a higher sensitivity setting, the farther away from the coil a target can be and still get a response. Please note that your detector will probably “chatter” at maximum sensitivity. This is normal and will not hurt your detector. The best setting is to set the Sensitivity control to a point just before the detector starts to chatter.

Perform Air Test in MOTION DISC Mode

As discussed before, the Discriminate Mode is used to filter unwanted targets from good targets. The principle behind this is pretty simple. The detector sends out a signal and then receives it back creating a small electronic field. As metal passes through the field that the detector generates, it causes a change in the received signal. The amount of change that each type of metal causes is fairly constant; therefore, we can tune our detectors to miss the targets that we don’t want to find. The change is based on the type of conductivity that each target has. The general list of targets is as follows: iron, foil, nickels, gold jewelry, pull tabs, screw caps, pennies and silver coins – starting with dimes and working up to silver dollars. This list is meant to be a guide only. There is a point that some gold rings and some pull tabs overlap. Also, the depth of the target and its orientation in the ground can change the received signal. A coin that is flat to the coil will produce a better signal than a coin that is on edge. Take some time now to try different combinations of depth and orientation of your targets and find out how your detector responds.

We are now ready to discriminate targets from each other. We will start with the DISC LEVEL at zero. Wave the targets one at a time at least 2 1/2 inches away from the coil. All four targets (the iron, nickel, pull tab and quarter) will respond with a good audio signal. Next, we will turn the DISC LEVEL up to approximately 3 or 4 (2 or 3 in the SALT Mode). This should be high enough to knock out the iron target and still get a positive response on the nickel, pull tab, and quarter. When you are done with the iron target, turn the DISC LEVEL to approximately 6 or 7 (4 or 5 in the SALT Mode). This level is high enough to knock out the nickel. At this time the iron target and the nickel should give no response, while the pull tab and quarter will give a solid response. Next, turn the DISC LEVEL to approximately 7 1/2 or 8 1/2 (7 or 8 in the SALT Mode). At this time only the quarter should respond with an audio signal. Now roll the DISC LEVEL all the way to MAX. Notice that the quarter is still responding. The discrimination will not go high enough to lose most silver coins.

This air test was designed to show you how the MOTION DISC Mode works. Each machine may be a little different than all the others, so you may want to take some time and try different targets to find the responses of your machine. At a later date, you may also build a test garden to test your detector in the field.

CONGRATULATIONS

Congratulations, you have just finished the Quickstart for your new Tiger Shark metal detector and in the process have learned quite a lot about your detector. But experience is the best teacher. I would recommend that you get out and practice with your detector as much as possible. Any time spent using your detector will give you valuable experience.

 


Ground Balancing Your Tiger Shark

Now that we have gone through the Quickstart, you are now ready to take your Tiger Shark out and learn how to ground balance. (Note: If you have not gone through the Tiger Shark Quickstart, it is strongly recommended that you do so before ground balancing your Tiger Shark.)

Ground balancing is a simple but very important skill that you must master to get the most out of your detector. The Tiger Shark has controls that will allow you to tune the detector to the exact ground matrix that you are hunting in. Finding and maintaining the exact tune or balance will give you the highest possible depth and stability for your conditions. Once you have read through this section, it is most important that you get out and practice your ground balancing skills as often as possible.

To start, find an area that is free of metal targets. If your coil is over any targets, it will always give a positive signal and it will be impossible to correctly ground balance your detector. Start with your Tiger Shark in the ALL MET FAST position. (You can use the ALL MET SLOW position, but it will take a little longer to do your ground balance.) At this time, it will not matter where your GROUND ADJUST knob is set. Place your DISC LEVEL at MIN and switch the MODE switch to NORM. After the battery test is done, you are ready to begin the ground balance procedure. (Note: Unless you are on a wet salt beach, do not use the SALT Mode. It will not ground balance to normal conditions. The SALT Mode is to be used only on a wet salt beach.)

Lift your detector straight off of the ground about 6 to 8 inches. Keep the coil parallel to the ground. At that height, your detector will not be affected by the ground mineralization. As you lower the coil, the detector will read the ground matrix and let you know how to adjust to achieve aground balance. (Note: You must lift your coil straight up. Do not swing it like a pendulum.) Once you have got a steady threshold, quickly lower the coil straight down to approximately 1 inch off of the ground and listen to any change that may occur in the threshold. You will hear one of three sounds: 1) the threshold will get louder or go positive 2) the threshold will go quiet or become negative, or 3) the threshold will stay the same.

If the threshold stays the same, the detector is telling you that the ground matrix is not affecting it and you are ready to hunt.

If you get a positive or negative signal, the machine is telling you that it is being affected by the ground matrix and must be adjusted for peak performance.

If your threshold goes positive, you must turn the GROUND ADJUST knob counterclockwise or towards the negative side.

If your threshold goes negative, you must turn the GROUND ADJUST knob clockwise or towards the positive side.

Once you have made an adjustment, lift the coil up, let the threshold retune and push the coil down again while listening for any sound change as the coil drops. If there is a threshold change, follow the above directions and repeat until you have very little or no threshold changes on the way down. A very slight positive response is better than any kind of negative response.

If there are threshold changes on the upstroke do not pay attention to them. As you raise the coil, the detector goes from a ground matrix (soil) to no ground matrix (air) and that difference will most likely cause some change in the threshold tone. Only changes on the downstroke are to be adjusted for.

Now that your detector is ground balanced, you are ready to hunt. You can stay in either of the ALL MET Modes or switch into the MOTION DISC. Whichever mode you choose to hunt in, it is always necessary to ground balance in an ALL MET Mode first.

Just like any skill, ground balancing must be practiced constantly. The easiest place to do it is in your backyard or any place close that has at least a 10 foot by 10 foot area. First, check for any metal targets and remove them. When the area is clean, take your Tiger Shark and ground balance it. When you are done, spin the GROUND ADJUST knob either positive or negative and ground balance again. Keep up this practice until you feel comfortable with ground balancing. Take some time to keep your ground balancing skills sharp and you will see better results in the field.

 


SELECTING THE RIGHT SEARCHCOIL

Selecting the right searchcoil for the type of detecting you’re doing will add greatly to your success.

In addition to the standard 8 inch open center searchcoil, two optional coil sizes are available for the Tiger Shark. The 10 1/ 2 inch open center coil is designed for areas where digging is easier and where junk targets may not be too numerous. The 7 inch coil will be particularly useful when searching for smaller targets, such as gold nuggets.

 


PINPOINTING

The sweep speed of the detector is slow enough to allow pinpointing in the Motion Discriminate Mode but will require a little more practice. Move the coil slowly from side to side and then from front to back over the target. Raising the coil slightly and slowing the sweep speed will narrow down the detection area enough that it’s easy to tell where the coil center is at the instant of sound.

Another easy method is to sweep the coil from side to side across the target in very short sweeps as you slowly move forward and backward across the target. Slow down the sweep rate and shorten the sweeps until you just barely get a response at one spot. The target will be directly below the coil center at this response time.

The easiest way to pinpoint for most people will be to switch to the ALL METAL Mode, since no-motion is required. To pinpoint a target that doesn’t saturate the audio, just move the coil forward and back and side to side until you get the strongest sound. The target will be directly below the coil center. If the audio saturates over a large area, simply hold the coil over the target momentarily to detune the detector. This will narrow its field of response to allow you to once again seek the area of strongest response.

 


DETECTOR PROTECTION CHECKLIST

Congratulations, you have just purchased a new metal detector, and we wish to thank you for choosing Tesoro.

So many people are disappointed when their new “state-of-the-art” detector becomes less and less exciting to use and doesn’t seem to go as deep anymore. There is something that you can do to keep your new detector working as good as when it was new.

The most important thing is simply to remember that your detector is an electronic instrument and to treat it as such. You wouldn’t expect your TV set to operate properly if you stored it in the trunk of your car, would you?

We have generated the following list to help you take care of your detector and to help ensure that you do not void its warranty. If you will follow its guidelines, you will find your detector will not let you down.

  1. Operate your detector exactly as recommended in this Operator Instruction Manual.
  2. Do not attempt to modify or repair the detector’s electronics.
  3. Cable is hard-wired into searchcoil. Do not attempt removal of the spring retainer on the searchcoil housing.
  4. Use only high quality carbon-zinc, alkaline, or nicad batteries. Remove batteries during long term storage. Never substitute batteries of other voltages. Brands should not be mixed. Do not attempt to modify the power supply system.
  5. Never spray lubricants such as WD-40 or any types of cleaners, sealants or other chemical preparation on or into the detector.
  6. Avoid banging the searchcoil against rocks or foundation walls.
  7. Always protect the searchcoil with a properly designed scuff cover.
  8. Remove and clean out scuff covers periodically to avoid buildup of mineralized or metallic particles.
  9. After use, clean the detector with a soft cloth to remove any dust, moisture, or other contaminants.
  10. Do not transport or store your detector in the trunk of your car.
  11. Keep cables properly wound to stem and protected. Floppy or pinched cables may short causing erratic noises or unnecessary replacement of searchcoils.
  12. Protect the detector from dust, moisture, and extreme temperatures during storage. Avoid storing it in places such as attics, basements or garages. When shipping the detector, use the original factory carton or a similar heavy-duty container. A one inch minimum clearance of padding around the detector must be provided when shipping.
  13. Treat your detector as you would any sensitive electronic instrument. Although ruggedly constructed and designed to withstand the demands of normal treasure hunting applications, it is not intended to be improperly operated or abused.

 


SPECIFICATIONS
Operating Frequency 12.5 kHz
Searchcoil Type Round, open center concentric
Searchcoil Size 8 inch Diameter
Audio Frequency Approx. 270 Hz
Audio Output Stereo Piezo Headphones
Weight (may vary slightly) Less than 4½ lbs.
Battery Requirement (8) AA DC (alkaline)
Battery Life (typical) 10 to 20 hours
Optimum Temperature Range 30° to 100° F
Operating Modes No-Motion All Metal – (Fast & Slow Tune)
Normal Mode
Salt Mode
Silent Search Motion Discriminate
Maximum Depth Rating 200 ft.
WARRANTY SERVICE

Your Tesoro metal detector is covered by a Lifetime Warranty, the terms of which are listed below. If your metal detector should require service, you may return it to the Tesoro factory at the address below.

LIMITED LIFETIME WARRANTY

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

This instrument is warranted to be free of defects in material and workmanship as long as it is owned by the original consumer purchaser. This warranty is not transferable and is valid only if the warranty registration card has been completed and mailed within 10 days of purchase.

TESORO will, at its option, repair or replace any instrument covered by this warranty, without charge, except for transportation charges, at its factory in Prescott, Arizona.

This warranty excludes batteries, damage caused by leaky batteries, cable breakage due to flexing on body mount units, and wear of the searchcoil housing. Also excluded are instruments which have been abused, altered, or repaired by an unauthorized party.

Under the copyright laws this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable form, in whole or in part, without the prior written consent of Tesoro Electronics Incorporated, except in the manner described in this documentation.
© 2001 Tesoro Electronics Incorporated. All rights reserved. Printed in the United States.


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Tesoro SAND SHARK Metal Detector OPERATOR INSTRUCTION MANUAL Salt water diving

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Tesoro SAND SHARK Metal Detector OPERATOR INSTRUCTION MANUAL
 


 

CONGRATULATIONS!

Your new TESORO metal detector was designed to provide you with many happy hours of enjoyment in the most rewarding hobby I can think of—treasure hunting. Ahead of you lie fascinating and exciting experiences as you step into the past, uncovering artifacts lost by past generations. I wish we could share these experiences with you, and we wish you the best of success.

Your Tesoro metal detector is capable of meeting your needs in a wide range of treasure hunting situations. As with any detector, operator skill and familiarity is probably the limiting factor in determining how successful you will be. We recommend that you read and understand this manual fully before attempting to use the instrument in the field. Then, as you practice and become familiar with your detector, your rate of success will increase dramatically.

Your TESORO metal detector is a precision electronic instrument, which will last for years if properly cared for. Treat it right and it won’t let you down.

 

 

 


GENERAL DESCRIPTION

The Sand Shark is the first Pulse Induction metal detector that is controlled by microprocessor technology. It combines new technology with Tesoro’s time-proven PI circuits and interchangeable Spiral Printed coils. While simple to operate, the Sand Shark offers a wide variety of user definable controls that allow for precise fine-tuning of the detector. Don’t be fooled by its simplicity, the Sand Shark is capable of delivering peak performance by eliminating troublesome adjustments and complicated features creating an extremely simple to operate lightweight detector. The Sand Shark is packaged in a waterproof housing making it ideal for wet weather use, beach hunting, or diving in fresh or salt water. It is convertible to body/belt mount and requires no special tools.

As a Pulse Induction instrument the Sand Shark will provide mineral free operation in virtually all ground mineral or salt water environments. Equipped with auto tuning the Sand Shark is a motion- based “all metal” detector. Though the searchcoil must be moving when pinpointing, due to the auto tuning, the amount of motion is so slight that pinpointing is easily accomplished.

Designed as an all-purpose detector, the Sand Shark requires no special ground adjustments or complicated set-up. A variety of optional searchcoils provide the operator greater versatility and a wider range of site selection. A guide to selecting the proper optional coil is included in the section for “Selecting the Right Searchcoil.”

Be sure to complete and mail the warranty registration card in order to validate your warranty.

 


UNPACKING THE BOX

Your Sand Shark was shipped with these parts:

1 Upper Pole Assembly

Fully assembled, including upper pole stem with handle grip, padded arm bracket, pole lock and control housing.

1 Middle Pole Assembly With Pole Lock

1 Lower Pole Assembly

Fully assembled with 2 washers and nylon nut and bolt.

1 8” round printed spiral searchcoil with 8′ cable

1 8-cell battery pack with 8 AA batteries installed

1 Tube of Dow Corning #4 silicone

2 Velcro cable straps

1 Operator Instruction Manual

1 Tesoro Warranty Card

If any of these items are missing, contact the Tesoro Authorized Dealer where you purchased your detector immediately.


ASSEMBLING YOUR DETECTOR

    1. On the lower pole assembly, remove the mounting screw and thumb nut from the pole tip.
    2. Insert the pole tip between the mounting ears of the searchcoil and align the holes of the pole tip and washers with those of the mounting ears.
      Note: The pole tip should fit very snugly into the mounting ears.
    3. Insert the mounting screw through the holes in the mounting ears and pole tip—entering from the side opposite the cable connection.
    4. Install the thumb nut on the mounting screw and tighten by hand.
      Note: Do not overtighten the thumb nut. It should be snug but not too difficult to loosen up.
    5. On the middle pole assembly, depress the two spring buttons and slide the middle pole assembly into the upper pole assembly until the spring buttons click into the holes—locking the two assemblies into place. Tighten the pole lock to secure the two assemblies together.

 

 

  1. Slide lower pole into middle pole until spring buttons click into the first set of adjustment holes. Turn pole lock to tighten—locking the assembly into place.
  2. The Sand Shark can be assembled in several different configurations. Take a look at the pictures below to find out the best configuration for you:Control housing mounted under arm
    Control housing mounted under pole
    Divers setup (lower pole set directly into upper pole)
    Body Mount

    Converting the Sand Shark from pole mount to body/belt mount is simply a matter of removing the control box from the upper pole and unwinding the cable. To remove the control box from the pole, depress the four spring buttons that hold the mounting bracket and control box to the pole, and lift. It is easiest to release one set of spring buttons at a time.

  3. Once you have decided on a pole mount configuration, wrap the cable around the pole leaving enough slack near the searchcoil to permit searchcoil adjustment.
    Install the coil connector into its receptacle on the back of the control housing and tighten it fingertight.

Note: Do not use pliers to tighten the coil connector. Do not allow the cable to flop loosely over the searchcoil. Since the detector is sensitive enough to “see” the tiny wires in the cable, a floppy cable can cause false signals as the searchcoil senses the moving wires.

 


BATTERY INSTALLATION / REPLACEMENT

The Sand Shark has been equipped with a drop-in battery pack. To install or replace the batteries, make sure the detector housing is dry, then release the two draw bolts securing the faceplate to the housing. Gently pull the control panel free being careful not to twist or strain the ribbon cable connecting the faceplate panel to the printed circuit board. The Sand Shark takes 8 AA size alkaline batteries. Also, make certain that you follow the polarity indicators on both the battery holder as well as the batteries themselves. Then check the polarity of the pack as it goes into the housing. Look inside the housing for the two spring clips and slide the pack so that the battery terminals meet the spring clips. There is only one correct way to put the battery pack in. If the batteries are put in wrong, the detector will not work. Replace the faceplate and use the drawbolts to clamp the faceplate back onto the housing.

Do not rest the unit on the coil connector while clamping the faceplate. This can cause excess wear and damage to the connector.

IMPORTANT NOTE: Always make sure the instrument is dry before opening. Water, if allowed to make contact with the circuit board, may damage it. Always make sure the O-ring is clean and free of dirt or sand. It is recommended that you wipe the O-ring with a dry cloth and look for damage and apply a new coat of diver’s silicone grease before replacing it. Failure to maintain the O-ring will result in extensive damage and will not be covered under warranty.


ADJUSTMENT

The searchcoil angle and stem length should be adjusted so that the unit does not become uncomfortable or tiring to hold after long periods of use. The detector should rest in your hand with arm relaxed allowing it to swing back and forth without having to lift with the elbow or shoulder while keeping the searchcoil as close as possible to the ground without touching. The pole length is adjusted by depressing the spring buttons and extending or shortening the lower stem until they click into the set of holes that give you the most comfortable setting. The searchcoil should rest about one inch above the ground while standing erect. Adjust the angle of the searchcoil so that it is parallel to the ground. Tighten the searchcoil thumbnut by hand so that the searchcoil will maintain this setting.


QUICKSTART TEST AND TUNING PROCEDURES

The Quickstart is designed to teach you how to use your new Sand Shark. It provides a quick and easy means of learning all of the functions of your detector and the concepts behind the functions.

You will need the following items:

  1. Your fully assembled Sand Shark metal detector.
  2. Several targets for air test.
  3. A nonmetal table or counter surface.

Here’s what you will do:

  1. Set the THRESHOLD and VOLUME.
  2. Perform an Audio Battery Test.
  3. Perform an Air Test in the VCO Mode.
  4. Set the Audio Frequency for the NORMAL Mode.
  5. Perform an Air Test in the NORMAL Mode.
  6. Set the Pulse Width.
Prepare for the Quickstart

Place your assembled Sand Shark on the nonmetal surface as shown in the photo. Make sure there are no metal objects near the coil and remove any jewelry from your hands and wrists.

Start with the controls like this:

  1. PULSE WIDTH in center position.
  2. VOLUME & THRESHOLD in the 1 o’clock position.
  3. Mode Switch in OFF position.
Set the Threshold and Volume

The Mode Switch controls all of the tuning functions on your Sand Shark. As we go through the other tuning steps, we will be resetting the Mode switch to the other functions.

We will start by turning the Mode Switch from off to VCO. At this time you will hear a humming tone in the headphones. This sound is the threshold. Its purpose is to give you a reference point to judge targets by. Some targets may be small enough or deep enough that they will not be able to generate an audio tone by themselves. By monitoring a threshold, you already have a signal so changes in that signal are easier to hear. However if the threshold is set too loud, the small changes will not be noticed. Therefore, a low steady threshold setting is ideal. You can change the threshold with the Threshold adjust knob. Try turning it up and down to find the best possible setting for the machine.

Once the threshold has been set, you should adjust the volume control to a comfortable level. Please remember that the sound level will be affected by your surroundings. What may be just right in one location may be too high or low in another. The volume can be changed with the VOLUME adjust knob. Take a moment and find the level that is best for you now.

Perform an Audio Battery Test

With the threshold and volume set, we will now check the batteries. Turn the THRESHOLD adjust knob all the way counterclockwise until you feel a click. You should hear a number of beeps. If the batteries are fully charged, you will hear 6 or 7 beeps. As the batteries drain, you will hear fewer and fewer beeps. When you hear no beeps or only one, it will be time to replace your batteries. Please remember that you will have to reset your threshold when you are done with the battery test. Try your battery test and reset your threshold before moving to the next step.

Perform an Air Test in the VCO mode

You are now ready to perform an air test in the VCO Mode. VCO stands for Voltage Controlled Oscillator. The VCO mode has a very distinct sound that makes it very easy to work with. As a target gets close to the coil, the rise in signal voltage causes the oscillator to change frequency and amplitude causing the audio part of the signal to become higher in pitch and louder in volume. These changes will leave no doubt in your mind that you are close to a target. Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and work your way towards the coil. Now try starting from 6 inches to the left or right side of the coil and working your way to the center of the coil. Notice how the audio signal changes. Your strongest signal will always be closest to the center of the coil, but additional information can also be learned by the signal strength. A deep or small target will give a smaller change in the threshold than a larger or shallower target will give. Take some time to try a number of different targets at different depths to find out how your detector sounds.

Set the Audio Frequency for the Normal Mode

In the NORMAL tuning mode you will be able to preset the frequency of the audio tone that you will hear in the headphones. The adjustment is made by going into the “F” SET Mode on the Mode switch. Notice that the “F” SET is highlighted in this mode and that “F” ADJUST written in the same highlighting is found beneath the THRESHOLD adjust knob. When the mode switch is in “F” SET, the THRESHOLD adjust knob now sets the audio tone. Try turning the “F” ADJUST knob up and down to find the audio frequency that you like best. While you are in the “F” SET mode, your Sand Shark will not respond to targets. When you are ready, turn the Mode switch to NORMAL. Please remember that once the frequency is set, you must reset your threshold to a low steady hum.

Perform an Air Test in the Normal Mode

You are now operating in the NORMAL Mode. In this mode only, one frequency at a time will be heard and the volume of the audio signal will determine signal strength. Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and work your way towards the coil. Now try starting from 6 inches to the left or right side of the coil and working your way to the center of the coil. Notice the difference from what you heard in the air test in the VCO Mode. Your strongest signal is still closest to the center of the coil, but there was no change in audio frequency. Take some time to try a number of different targets at different depths to find out how your detector sounds.

Set the Pulse Width

The PULSE WIDTH setting controls the amount of signal that the Sand Shark will transmit into the ground. A pulse induction detector works by transmitting a signal and then reading the residual eddy currents that are left on metal items. All of this takes place at approximately 600 pulses per second. Increasing the pulse width allows the detector to transmit longer and create more eddy currents on a metal target. These extra currents are more easily picked up during the receive phase and will therefore increase depth and sensitivity. However, more transmitted signal means more power used in the transmit phase, limiting the battery life. We have marked the best balance of battery life and depth and sensitivity on the faceplate at the mid-position on the PULSE WIDTH adjust knob. You will be able to increase or decease the PULSE WIDTH by turning the Pulse width adjust knob. Start with the detector in the factory recommended position and wave a few targets in front of the coil. Try turning the knob and see what effects it has on depth and sensitivity.

 


CONGRATULATIONS

You have completed the Sand Shark Quickstart Test and Tuning Procedures and in the process have learned quite a lot about your new Sand Shark. But experience is the best teacher. I would recommend that you get out and practice with your detector as much as possible. For your convenience, you may want to create a test garden in your lawn or work a local park. Any time spent using your detector will give you valuable experience.

 


SELECTING THE RIGHT SEARCHCOIL

Selecting the right searchcoil for the type of detecting you’re doing will add greatly to your success. The Sand Shark comes with a standard 8 inch Printed Spiral coil, which is a new and revolutionary design developed by Tesoro specifically for the Sand Shark. This is an excellent overall coil since most people who operate PI instruments are usually searching large sandy beach areas where targets are easy to dig and there is usually not an over abundance of trash. This coil will detect very tiny targets for its size and provides excellent target separation while giving more ground coverage. However, it is not always the right coil for the job. Therefore, Tesoro has made it possible to interchange coils and has developed a variety of its unique Printed Spiral searchcoil in a selection of sizes.

In addition to the standard 8 inch open center searchcoil, three optional coil sizes are available for the Sand Shark. The 10 1/2 inch open center coil is designed for areas where digging is easier and where junk targets may not be too numerous. The 7 inch coil will be particularly useful when searching for smaller targets, such as gold nuggets. The 10 inch elliptical allows a widescan sweep pattern while keeping a good sensitivity to small targets.

 


PINPOINTING

Move the searchcoil slowly across the target from side to side and then from front to back at 90 degree angles. Raise the coil slightly, slow the sweep speed, and shorten the sweep to narrow the detection area enough to make it easy to tell where the coil center is at the instant of sound as you crisscross the target.

 


DETECTOR PROTECTION CHECKLIST

Congratulations, you have just purchased a new metal detector, and we wish to thank you for choosing Tesoro.

So many people are disappointed when their new “state-of-the-art” detector becomes less and less exciting to use and doesn’t seem to go as deep anymore. There is something that you can do to keep your new detector working as good as when it was new.

The most important thing is simply to remember that your detector is an electronic instrument and to treat it as such. You wouldn’t expect your TV set to operate properly if you stored it in the trunk of your car, would you?

We have generated the following list to help you take care of your detector and to help ensure that you do not void its warranty. If you will follow its guidelines, you will find your detector will not let you down.

  1. Operate your detector exactly as recommended in this Operator Instruction Manual.
  2. Do not attempt to modify or repair the detector’s electronics.
  3. Cable is hard-wired into searchcoil. Do not attempt removal of the spring retainer on the searchcoil housing.
  4. Use only high quality carbon-zinc, alkaline, or nicad batteries. Remove batteries during long term storage. Never substitute batteries of other voltages. Brands should not be mixed. Do not attempt to modify the power supply system.
  5. Never spray lubricants such as WD-40 or any types of cleaners, sealants or other chemical preparation on or into the detector.
  6. Avoid banging the searchcoil against rocks or foundation walls.
  7. Always protect the searchcoil with a properly designed scuff cover.
  8. Remove and clean out scuff covers periodically to avoid buildup of mineralized or metallic particles.
  9. After use, clean the detector with a soft cloth to remove any dust, moisture, or other contaminants.
  10. Do not transport or store your detector in the trunk of your car.
  11. Keep cables properly wound to stem and protected. Floppy or pinched cables may short causing erratic noises or unnecessary replacement of searchcoils.
  12. Protect the detector from dust, moisture, and extreme temperatures during storage. Avoid storing it in places such as attics, basements or garages. When shipping the detector, use the original factory carton or a similar heavy-duty container. A one inch minimum clearance of padding around the detector must be provided when shipping.
  13. Treat your detector as you would any sensitive electronic instrument. Although ruggedly constructed and designed to withstand the demands of normal treasure hunting applications, it is not intended to be improperly operated or abused.

 


SPECIFICATIONS
Operating Frequency 600 pps
Searchcoil Type Printed Spiral
Searchcoil Size 8 inch Diameter
Audio Frequency Approx. 220-450 Hz
Audio Output Stereo Piezo Headphones
Weight (may vary slightly) Less than 4½ lbs.
Battery Requirement (8) AA DC (alkaline)
Battery Life (typical) 10 to 20 hours
Optimum Temperature Range 30° to 100° F
Optimum Humidity 0 to 75% R.H.
Operating Modes VCO Motion All Metal
Adjustable Audio Frequency All Metal
Maximum Depth Rating 200 ft.

 

WARRANTY SERVICE

Your Tesoro metal detector is covered by a Limited Lifetime Warranty, the terms of which are listed below. If your metal detector should require service, you may return it to the Tesoro factory at the address below.

LIMITED LIFETIME WARRANTY

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

This instrument is warranted to be free of defects in material and workmanship as long as it is owned by the original consumer purchaser. This warranty is not transferable and is valid only if the warranty registration card has been completed and mailed within 10 days of purchase.

TESORO will, at its option, repair or replace any instrument covered by this warranty, without charge, except for transportation charges, at its factory in Prescott, Arizona.

This warranty excludes batteries, damage caused by leaky batteries, cable breakage due to flexing on body mount units, and wear of the searchcoil housing. Also excluded are instruments which have been abused, altered, or repaired by an unauthorized party.

Under the copyright laws this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable form, in whole or in part, without the prior written consent of Tesoro Electronics Incorporated, except in the manner described in this documentation.
© 2001 Tesoro Electronics Incorporated. All rights reserved. Printed in the United States.

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TESORO CORTÉS CORTES METAL DETECTOR OPERATOR INSTRUCTION MANUAL

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TESORO CORTÉS METAL DETECTOR OPERATOR INSTRUCTION MANUAL
 


 

CONGRATULATIONS!

Your new Tesoro Cortés metal detector is part of a new series of detectors designed to provide you with many happy hours of enjoyment in the most rewarding hobby I can think of—treasure hunting. Ahead of you lie fascinating and exciting experiences as you step into the past—uncovering artifacts lost by past generations, or as you take pleasure in the great outdoors with family and friends searching for precious metals. I wish we could share these experiences with you, and all of us at Tesoro wish you the best of success.

Your Tesoro detector is capable of meeting your needs in a wide range of treasure hunting situations. As with any other metal detector, familiarity with this instrument is probably the limiting factor in determining how successful you can be. I recommend that you read this manual and fully understand how to operate this detector before attempting to use it in the field. As you become more familiar with your detector through practice, your rate of success will increase dramatically.

The Cortés is a precision electronic instrument that will last for years if properly cared for. Treat it right and it won’t let you down.

 

 


GETTING STARTED – UNPACKING THE BOX

Your Cortés was shipped with these parts:

1 Upper Pole Assembly

Fully assembled, including upper pole stem with handle grip, padded arm bracket and control housing.

1 Middle Pole Assembly With Pole Lock

1 ABS Lower Pole Assembly

Fully assembled, complete with two friction washers, mounting screw, and thumb nut.

1 9 x 8 Concentric Searchcoil With 3’ Cable

2 Battery Packs, Each With 4 AA Batteries

1 Operator Instruction Manual

1 Tesoro Warranty Card

If any of these items are missing, contact the Tesoro Authorized Dealer where you purchased your detector immediately.

Assembling the Cortés is simple and requires no special tools. Just install the battery packs, mount the searchcoil on the lower pole assembly, connect the pole assemblies together, wrap the excess cable around the pole and plug the cable into the control housing. Finally, adjust the pole length and searchcoil angle and you’re ready!


INSTALLING THE BATTERY

The Cortés is powered by 8 AA batteries divided into 2 compartments, which are located in the armrest housing.

Open the battery compartment under the armrest by gently grasping the bottom edge of the door and pulling outward and upwards. (The door is hinged at the top.)

Remove the batteries by pressing down on the right side of the 4-pack battery holder so that the left side of the holder will pop up. Pull out the holder and replace the batteries as needed.

When returning the holder, note the position of the spring clips inside the armrest housing and make sure that the battery pack contacts fit snugly against the springs. Insert the side with the contacts first and then press down on the left edge of the battery holder to reseat the holder.

Snap compartment cover to close.


ASSEMBLING YOUR DETECTOR
    1. On the lower pole assembly, remove the mounting screw and thumb nut from the pole tip.
    2. Insert the pole tip between the mounting ears of the searchcoil and align the holes of the pole tip and washers with those of the mounting ears.
      Note: The pole tip should fit very snugly into the mounting ears.

 

    1. Insert the mounting screw through the holes in the mounting ears and pole tip—entering from the side opposite the cable connection.
    2. Install the thumb nut on the mounting screw and tighten by hand.
      Note: Do not overtighten the thumb nut. It should be snug but not too difficult to loosen up.
    3. On the middle pole assembly, depress the two spring buttons and slide the middle pole assembly into the upper pole assembly until the spring buttons click into the holes, thus locking the two assemblies into place. Tighten the pole lock to secure the two assemblies together.

 

    1. Slide lower pole into middle pole until the spring buttons click into the first set of adjustment holes. Turn pole lock to tighten, thus locking the assembly into place.
    2. Wrap the cable around the pole leaving enough slack near the searchcoil to permit searchcoil adjustment. Note: Do not allow the cable to flop loosely over the searchcoil. Since the detector is sensitive enough to “see” the tiny wires in the cable, a floppy cable can cause false signals as the searchcoil senses the moving wires.
    3. Plug the male cable end into the female connector on the control housing and tighten the cable thumb nut. You are finished!
      Note: You will want to adjust the pole length and the searchcoil angle to your preference.

 


ADJUSTING THE POLE & SEARCHCOIL

The pole length should be adjusted so that the detector does not become uncomfortable or tiring after long periods of use. The detector grip should rest in your hand with your arm relaxed, your elbow straight but not locked, with the pole extending out in front of you at the approximate angle shown in the photo.

You should be able to swing the detector back and forth in front of you—using relaxed shoulder movement—while keeping the searchcoil as close to the ground as possible. This swinging movement is often called a “sweep.”

The searchcoil should not touch the ground during your sweep. The pole length should be adjusted to allow this without having to lift the detector with your elbow or shoulder. The searchcoil should rest about one inch above the ground while you are standing erect. The angle of the searchcoil should allow the bottom to be parallel to the ground.

The pole length is adjusted by loosening the pole lock, then depressing the spring buttons and extending or shortening the pole until the spring buttons click into the set of holes that give you the most comfortable pole length.

To adjust the searchcoil angle, simply loosen the searchcoil thumb nut slightly and move the searchcoil into the desired position. Tighten the searchcoil thumb nut by hand so that the searchcoil will hold in place.

 


QUICKSTART – SELF-GUIDED TUTORIAL

The Quickstart is designed to teach you how to use your new Cortés. It provides a quick and easy means of learning your detector and the concepts behind all of the functions.

You will need the following items:

  1. Your fully assembled Cortés.
  2. An iron target (a small nail or screw will do), an iron washer, a nickel, a zinc penny (1982 or later), a quarter and a couple of different pull tabs.
  3. A nonmetal table top or counter.

Here’s what you will do:

  1. Check Display Readings in DISC Mode
  2. Adjust SENSITIVITY
  3. Perform Air Test in DISC Mode
  4. Perform Air Test in NOTCH Mode
  5. Perform Air Test in SUM Mode
  6. Adjust THRESHOLD
  7. Adjust GROUND BALANCE for Air Test
  8. Perform Air Test in ALL METAL Mode
  9. Check Back Light Levels
Prepare for the Quickstart

Place your assembled Cortés on the nonmetal surface. Make sure that there are no metal objects near the coil and remove any jewelry from your hands and wrists.

Start with the controls like this:

  1. THRESHOLD, SENSITIVITY and DISCRIMINATE LEVEL knobs turned completely counterclockwise.
  2. MODE, NOTCH and LIGHT switches in the center position.
  3. GROUND BALANCE knob in the 12 o’clock position.
Check Display Readings in DISC Mode

Turn the SENSITIVITY knob from OFF to about 2-3. You will hear a quick beep followed by a slight hum that will fade away. This is the detector letting you know that it has been turned on and is ready to go.

The Tesoro Cortés is a Target Identification Detector or T.I.D. The most important feature is the 2 by 16 character display found on the upper half of the detector faceplate. At this time the only thing that should be displayed on your screen is the battery level indicator in the lower right corner and the word DISCRIMINATE. The battery level is a continuous test of the condition of your battery. The indicator will read like a fuel gauge. As the batteries get lower, the bar dips lower. When the bar becomes very small, it is time to change your batteries.

Pass any target over the coil and read the meter. The information is unimportant at this moment. After about 6 to 10 seconds the screen will clear and the word DISCRIMINATE will appear again. The Cortés will clear the display screen after that amount of time so you will be able to visually see a target even if you do not get an audio response. You may want to take some time to try this out.

As you were waving the targets, you will have noticed that the display has several areas that contain different pieces of information. All of the different segments will be used together to determine the most likely identification of the target while it is still in the ground. As you are practicing, please note that different distances from the coil, orientation of the target, and width of the sweeps or passes over the coil may produce a variety of slightly distinct display readings.

NOTE: A target identification detector is never 100% accurate. If you get a strong, positive audio signal when hunting, dig it, no matter what the display shows. Digging the good audio/bad display target will result in better finds over the long run than ignoring those signals.

The top row of the display shows the target data in the broadest strokes. All targets will fall into one of four categories: Iron or Foil; Nickel, Pull Tab, Ring; Zinc Penny, Screw Cap; Silver Coin, Copper Penny. This brief information will lead you to the bottom row that contains much more detailed data.

Starting from the bottom left-hand corner of the display, you will find the COIN DEPTH indicator. This section will let you know the approximate depth of the target. In the center of the bottom row is a nine segment bar graph. It will show all of the information the detector saw during the entire coil sweep. Full sweep data information is helpful in determining possible treasure/trash masking and odd-shaped iron. Between the graph and the battery indicator is the ID NUMBER. The ID Number shows the peak part of the signal as a two digit number from 0 to 95. Iron reads as 0 and copper and silver coins read 95. All other targets will read somewhere in between. Take some time to try all of your targets and notice the different readings that you get. The best distance from the coil is somewhere between 4 and 8 inches. If you get closer, you will notice the detector will read LIFT COIL. Moving the target away from the coil slightly will result in a more accurate reading.

Below are some of the possible readings from various targets. These are not exact and your machine may read slightly different.

Small Iron Target (Screw or Nail): You may not get an audio signal depending on the target size and shape. However, you will get a meter reading.

Iron Washer or Odd-Shaped Iron: Odd-shaped iron or iron with holes in it can fool many machines. As it starts to pass under the coil, it may look like a coin. But as it nears the center of the coil, its signal shifts to the more traditional iron signal. Notice the two illustrations below. In the first, the top row reads iron or foil, the bar graph has some peaks in the coin range and the ID number reads 0. In the second, the top row reads zinc cent, screw cap, there is nothing in the bar graph and the ID number reads 88.


The thing that both of these illustrations have in common is that the various segments of the display do not “agree” with each other. This is a sure sign that you are detecting an odd-shaped piece of iron. Notice on the rest of the illustrations that the bar graph and the ID number show about the same information. When the ID number and the graph “agree,” you can be sure that your Cortés is receiving a clean signal.


Adjust SENSITIVITY

The all metal circuit uses a single channel to detect various metals. The discriminate circuit uses two different channels, then amplifies and filters them. The detector will then compare the signals and determine whether or not to beep at the target. While there is a great advantage to ignoring unwanted targets, it can make the circuitry more susceptible to interference. A number of outside conditions such as power lines, highly mineralized soil, and wet salt sand can cause interference.

The SENSITIVITY knob is used to raise or lower the power to the operational amplifiers, which changes the gain. Gain is a measurement of how much a signal is amplified. The higher the gain the more depth and sensitivity to small objects a detector has. Unfortunately, any small interference that is amplified can cause the detector to become erratic. The SENSITIVITY control is used to find the best gain setting in any location without letting the detector become unstable.

The SENSITIVITY knob is numbered from MIN to 10 and then has an orange area called the Max Boost Zone. For normal hunting, anywhere in the numbered zone will work very well. However, the Max Boost will allow you to increase the power to the operational amplifiers to the point of overload. This may cause your detector to become unstable and force you to turn the SENSITIVITY knob to a lower setting. An overload situation will not hurt your detector, but it will maximize the gain that is used by your detector. This can, in certain conditions such as low mineralization in the soil, cause your detector to penetrate deeper into the ground and become more sensitive to small targets.

Take some time to try waving targets in front of the coil with different sensitivity settings. Notice that the higher the sensitivity setting, the farther away from the coil that a target can be and still respond with an audio signal.

Perform Air Test in DISC Mode

As discussed before, the Discriminate Mode is used to filter unwanted targets from good targets. The principle behind this is pretty simple. The detector sends out a signal and then receives it back creating a small electronic field. As metal passes through the field that the detector generates, it causes a change in the received signal. The amount of change that each type of metal causes is fairly constant; therefore, we can tune our detectors to miss targets that we don’t want to find. The change is based on the type of conductivity that each target has. The general list of conductive targets is as follows: iron, foil, nickels, gold jewelry, pull tabs, screw tabs, pennies and silver coins starting with dimes and working up to silver dollars. This is very easy to visualize using the bar graph. This list is meant to be a guide only. There is a point that some pull tabs, nickels and gold jewelry overlap. Also, the depth of the target and its orientation in the ground can change the received signal. A coin that is flat to the coil will produce a better signal than a coin that is on edge. Take some time to try different combinations of depths and orientation of your targets and find out how your detector responds.

We are now ready to discriminate targets from each other. We will start with the DISCRIMINATE LEVEL at MIN. Please notice that the DISCRIMINATE LEVEL knob has words that correspond to the items that are discriminated out. While performing the Air Test, notice that your Cortés will continue to display target data for items that do not respond with an audio signal.

All of your targets except the small iron should respond with a good audio signal at the MIN setting. Next, we will turn the DISCRIMINATE LEVEL up to the 5¢ setting. This level is high enough to knock out the nickel. At this time the iron target and the nickel should give no response, while most of the pull tabs, the zinc penny, and the quarter will give a solid response. The iron washer may fall out at some point or may give a choppy signal all the way up to MAX. But reading the display should give you the indication that it is odd-shaped iron. Next, turn the DISCRIMINATE LEVEL knob just past the PULL TAB marking. At this time most or all of the pull tabs should not give any audio signal. The zinc penny and the quarter should give a strong signal. Now roll the DISCRIMINATE LEVEL all the way to MAX. Notice that the penny has stopped responding and only the quarter is still responding. The discrimination will not go high enough to lose most of the silver coins.

This Air Test was designed to show you quickly how your Discriminate Mode works. Each machine may be a little different from all of the others, so you may want to take some time and try different targets to find responses of your machine. At a later date, you may want to build a test garden to test your detector in the field.

Perform Air Test in NOTCH Mode

There is a very distinct difference between the regular Discriminate and the Notch Filter Discriminate. While both filter out unwanted targets, the regular Discriminate Level knocks out everything below the level it was set at. The Notch Filter Discriminate works only in a certain band and does not affect the targets below or above it. This gives the detector the advantage of discriminating most of the pull tabs and still keeping nickels and gold rings. The Notch Filter Discriminate has two settings—Narrow and Wide. Narrow covers most pull tabs and Wide covers most pull tabs and most screw caps.

Turn the DISCRIMINATE LEVEL down to MIN. Please remember that the regular Discriminate will override the Notch Filter Discriminate. The best settings when using the Notch Filter Discriminate is to have the DISCRIMINATE LEVEL set just high enough to knock out small iron and foil and use the NOTCH switch to define the width of the Notch window.

Flip the NOTCH switch to either NAR. (Narrow) or WIDE. The N will indicate a narrow notch window and will be in the round tab and square tab portion of the graph segments. The wide notch window will cause a W to be in the round tab, square tab and zinc penny segments.

These indications are an easy way to check what part of the scale is being notched out. The notch indicators will only show when there is no target under the coil. When there is a target signal, no matter if the target has been discriminated or not, the display will show the information of the target. Take some time to try various targets and note the response. When you are done, flip the NOTCH switch back into the center position before moving to the next section of the quick start.

NOTE: No detector can guarantee to discriminate out all of the pull tabs and respond to all of the gold rings. The Cortés has two different notch positions to knock out the most common trash targets. Only the user can determine the right amount of Notch Filter Discrimination that is correct for his/her hunting style and local environment.

Perform Air Test in SUM Mode

The Sum Mode is a feature that can help identify targets. While the detector is in either the Discriminate or All Metal Mode, the display shows the target information from the entire sweep of the coil. Each time the coil passes over the target, the microprocessor generates a new target ID reading. While this is nice for general searching, it can be confusing while pinpointing. This is where the Sum Mode becomes useful. Pushing the springloaded switch into the Sum Mode causes the detector to start a multi-tone ID and averages all of the coil passes over the target. The tone ID has nine different tones and relates directly to the bar graph segments. The higher up on the graph the target is, the higher the pitch of the audio signal. Averaging the coil passes over the target gives the detectorist the ability to get rid of most of the signal noise that prevents making an accurate target identification.

Start by waving targets across both the outer and inner rings of your 9×8 coil. Notice that you are hearing a single frequency audio tone and that the display may change. Now push the MODE Switch to the SUM position and let go. The switch should spring back to the center position. The SUM Mode is a momentary position only. In the SUM Mode, you will want to shorten your coil sweep down to about 2″ to 4″. You will be able to duplicate this by waving your target over the inner ring of your 9×8 coil only. Shortening the coil sweep helps to eliminate unwanted ground noise in the field.

Now push and hold the MODE Switch into the SUM position. As you wave your targets, you will notice the audio signal starts out with a low tone and will shift as the Cortés averages the coil sweeps. After 4 to 7 sweeps, the tone should stop shifting and the display will show the most accurate data available.

Take some time to check all of your targets and notice the different tones and practice shortening your target sweeps.

Adjust Threshold

Flip the MODE Switch to the farthest right-hand position. This will put your Cortés into the ALL METAL Mode. The All Metal Mode is used to help pinpoint and handle highly mineralized ground. The Cortés uses a factory preset ground balance in the DISCRIMINATE Mode. This will work fine for most hunting conditions, but some areas may have a high enough mineral content to cause a loss of depth and sensitivity. The ALL METAL Mode and its adjustable ground balance was designed to allow you to work in those tougher conditions.

To adjust the threshold tone, turn the THRESHOLD knob clockwise until you hear a slight but steady tone. You will have to turn the knob to somewhere between the 10 o’clock and 1 o’clock position to get the best hum.

The purpose of the threshold tone is to give a reference to judge targets for pinpointing and to adjust the ground balance. (For more information on ground balancing, see the “Adjust GROUND BALANCE for Air Test” section below and the “Ground Balancing in the Field” section.)

In the field, some targets may be small enough or deep enough that they will not be able to generate an audio signal by themselves. By monitoring a threshold tone, you already have a threshold tone so changes are easier to hear. However, if the threshold is set too soft or too loud, small changes in the signal will be hard to hear. Take some time and find a threshold level that is right for you.

Adjust GROUND BALANCE for Air Test

The ground balance function for your Cortés is a form of discrimination that allows you to tune out the mineralization in the ground that may mask targets or decrease the detector’s depth and sensitivity. The GROUND BALANCE knob is on a 3 and ¾ turn potentiometer. While the knob will turn endlessly in either direction, when the knob is at the end of its range, a slight drag will be felt while turning.

NOTE: The following procedure is for the Air Test only. For directions on ground balancing your Cortés in the field, see the “Ground Balancing in the Field” section.

To set the GROUND BALANCE knob for the Air Test, turn the knob 5 turns counterclockwise and then turn the knob 2 turns clockwise. This will make sure the GROUND BALANCE knob is just slightly above the middle part of its range. No further turns will be needed for the Air Test.

Perform Air Test in ALL METAL Mode

Once you have set the correct threshold hum and adjusted the ground balance, you are ready to perform an Air Test in the ALL METAL Mode. Your Cortés has a VCO-style ALL METAL Mode. You will find that as targets get closer to the coil, the threshold tone will get louder and higher in pitch.

Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and slowly work your way closer to the coil. Then try starting from 6 inches away from the left or right of your coil and work your way to the center of the coil. Notice the changes of the audio signal.

Your strongest signal will always be closest to the center of the coil. Additional information can also be learned by the signal strength and pitch. A smaller or deeper target will give a less noticeable change in the threshold than a larger or more shallow target will give. Take some time and try all of your targets at different depths to find out how your detector sounds.

Check Back Light Levels

The Cortés has a back lighting system so that you will be able to hunt in darkened conditions. To check the back light levels, shade the display with your cupped hand or turn down the light in the room that you are in. Flip the LIGHT switch from the center position to either the LOW or HIGH position. You should see the display light up. Make sure that you return the LIGHT switch to the center position when you are done using the back light.

NOTE: Using the LIGHT feature will cause your batteries to drain much faster than during regular use. The Low Level draws less current than the High and will not drain your batteries as quickly.

Conclusion

Congratulations, you have just finished the Quickstart for your new Cortés detector and in the process have learned quite a lot about your detector. But experience is the best teacher. I would recommend that you get out and practice with your detector as much as possible. Any time spent using your detector will give you valuable experience.

 


OPERATING TECHNIQUES
Ground Balancing In The Field

Ground balancing is not a difficult procedure, but it is critical if you desire maximum depth and stability. It is especially important if you plan to find deep relics or prospect for gold nuggets.

To ground balance in the field, we will start by assuming your detector is turned off. This will be the normal condition of your detector when you start hunting. Ground balancing can be done at any time while you are using the detector. It is not necessary to turn the machine off each time that you ground balance.

Start with the controls in the following positions:

  1. SENSITIVITY on OFF.
  2. MODE in the ALL METAL position.
  3. All other controls will be set during the ground balancing procedure or are not applicable at this time.

Turn the detector on by rolling the SENSITIVITY knob clockwise to about 9 or 10 on the dial. You will hear a quick double beep to let you know the detector is operating. Next adjust the THRESHOLD knob until a slight, steady hum is heard. The machine is now ready to be ground balanced. Next find an area that has no metal targets in the ground, as this may give false readings while in the ground balance procedure.

As shown in the photos, raise your searchcoil about 6 to 8 inches off of the ground. This is high enough so that the detector will no longer read the minerals in the ground. While listening to the threshold sound, lower the searchcoil to about 1 inch off of the ground. As the coil is dropped, the detector will start to read the ground minerals and will give you one of three sounds: 1) The threshold tone will get louder and raise in pitch. This is a positive response. 2) The threshold tone will go quiet, followed by a quick tone. This is called a negative response. 3) There will be no change in the threshold tone as the coil is dropped. This is the balanced response. When you get a balanced response, the detector is telling you that it is ready to hunt.

The positive and negative responses are easy to adjust. If you get a positive response, turn the GROUND BALANCE knob towards the minus sign on the face or in a counterclockwise direction. Getting a negative response means turning the GROUND BALANCE knob towards the plus sign on the faceplate or in a clockwise direction.

Here is an example of balancing: After setting up the detector, you raise the coil and then push it to the ground. As the coil drops, the threshold hum gets louder. You then turn the GROUND BALANCE knob counterclockwise towards the minus sign. You pick up the coil and push down again. This time you get a slight negative response. Turn the GROUND BALANCE knob a little bit towards the positive or in a clockwise direction. When raising and lowering the coil, the threshold made no change as the coil was dropped. At this point the detector is balanced for the area and is ready to hunt.

Ground balancing is a learned skill, one that you should practice often. It is easy to practice almost anywhere—your front or backyard, a local park or a fair-sized flower garden. When you are practicing, make sure that there are no pieces of metal underneath your coil that may cause a target sound.

NOTE: Please remember that the coil must be lifted straight off of the ground. Swinging the coil in an arc, like a pendulum, will cause false readings and will result in an improper ground balance.

Handling Your Detector

The detector should be held in a position that is comfortable for you as shown in the “Adjusting The Pole & Searchcoil” section in Getting Started. Swing the detector from side to side in about a three foot arc, overlapping succeeding strokes well. This motion is called a “sweep.” The Cortés was designed to get maximum depth without the frantic pace required of earlier motion detectors, so go at a pace that is comfortable for you. In fact, trying to hunt too fast may even cause a loss of depth in heavily mineralized locations.

Regardless of which mode you are using, try to keep your searchcoil height constant and close to the ground. Most people tend to raise the coil at the end of a sweep—much like a pendulum—especially if they are hurrying. Try to avoid this as any increase in height from the ground will cause a corresponding loss of depth.

In areas with well-kept lawns, the easiest way to maintain a constant searchcoil height is to allow the coil to rest on the grass as you sweep from side to side. In rough and rocky areas, it is best not to “scrub” the coil on the ground, as the rocks will act like abrasives and wear away the coil bottom (an optional coil scuff cover will protect against this). Sweep the coil as close to the ground as possible without touching. Hitting the ground or rocks may cause a false signal, much like a desired target would. Sweeping the coil too high above the ground results in a loss of depth.

Pinpointing a Target

When pinpointing a target, the All Metal Mode can offer advantages over the Discriminate Mode, such as no false signals and no need to move the searchcoil to get a target response.

A good method for pinpointing in All Metal Mode is “X-ing” the target with the searchcoil. Remember that the target’s response sound is always greatest when the target is directly under the center of the searchcoil. To “X” a target, sweep the searchcoil over the target from side to side and then from front to back until you can identify the center of the X—the spot on the ground where the target response sound is the greatest.

Pinpointing a target in Discriminate Mode is probably best done by “X-ing” as well. Remember that the detector will beep just as the target passes under the center of the searchcoil. Slowing the sweep speed down will help you pick out the center of the X because the target response is reduced at very slow speeds making it easier to correlate the sound with the coil center.

Another easy method is to sweep the coil from side to side across the target in very short sweeps as you slowly move forward and backward across the target. Slow down the sweep rate and shorten the sweeps until you just barely get a response at one spot. The target will be directly below the coil center at this response time.

Another method of pinpointing in Discriminate Mode is to quickly change to the All Metal Mode to check the target response. Remember that the All Metal Mode is not susceptible to the false signals of the Discriminate Mode and can sometimes give a clearer and more consistent response to difficult targets such as a dime buried next to a pull tab. By switching back and forth between modes and comparing the target response sound in All Metal to the target response sound in Discriminate, you can often better identify the likely location of the target.

Finally, raising the searchcoil during pinpointing can also help by narrowing the response to the target. Practice pinpointing often, and you will soon become more accurate and faster.

Planting a Test Garden

To better learn how your detector will perform in the field, it would be helpful to bury some coins and trash metal junk items in an area that you know is clear of other metal objects, and then try the Cortés in the All Metal & Discriminate Modes. Check the area in All Metal Mode to be sure it’s clear of trash. Then bury the targets at least 1 foot apart and from 2 to 4 inches deep to start. Make a map of the area to be sure you know what each target is and how deep it is. Practice on these targets to familiarize yourself with your detector’s target response. This will also help you learn the proper sweep speed for best operation. This type of practice area is often called a “test garden” or “test bed” and is one of the best tools to help you develop your metal detecting skills.

GENERAL INFORMATION – CARE AND USE
Basic Care

The Cortés is a sturdy instrument, but it is not designed to withstand abuse. In caring for your Cortés there are several important “DO NOTs” to remember. DO NOT use it to pry rocks loose or to beat bushes out of the way. DO NOT drop the machine into water. DO NOT use it unprotected in the rain. DO NOT leave it exposed at night where dew could form on it. DO NOT store it in places that could get extremely hot (next to a woodstove, in an attic). DO NOT leave it in the trunk of a car or in the back of a hatchback-style car where high temperatures could build up. DO NOT store it with the batteries installed as batteries may leak. DO NOT spray lubricants such as WD-40, or any type of cleaners, solvents, sealants or other chemicals into or onto the electronic parts, switches or controls. And finally, DO NOT attempt to modify or repair the detector’s electronics as this will void your detector’s warranty.

THE WARRANTY DOES NOT COVER DAMAGE RESULTING FROM AN ACCIDENT, NEGLECT OR ABUSE.

Protecting Your Investment

Often detectorists are disappointed when their new detector slowly becomes less and less responsive and seems to have lost some of its original peak performance. You can help avoid this from happening to your detector by following these basic care and protection guidelines:

  • Operate your detector exactly as recommended in this Operator Instruction Manual.
  • Use only high-quality alkaline batteries of the correct voltage. Never substitute a different voltage. When using a Ni-Cad battery, always use a separate convertible pack with the proper voltage output for the detector’s design.
  • Remove the battery from the detector after each use. This will prevent damage to the detector if the battery leaks.
  • The searchcoil cable is hard-wired to the searchcoil and protected by a strain relief. Inspect the strain relief frequently to make sure it is firmly attached and intact.
  • Keep cables properly wound around the pole stems and protect them during use. Floppy, pinched, or cables that become snagged during use may short, causing erratic noises or unnecessary replacement of the searchcoil.
  • Sweep the searchcoil carefully, especially when using around rocks and building foundations. Avoid hitting the searchcoil against hard, solid objects and surfaces.
  • Keep your searchcoil slightly off of the ground during the sweep, especially when using in gravel or hard, rocky dirt.
  • Always use a properly designed protective scuff cover on the searchcoil. (See “Optional Accessories” in the next section.)
  • Remove and clean out scuff covers periodically to avoid buildup of mineralized dirt particles which will affect performance.
  • The searchcoil is waterproof and can be submerged in either fresh or salt water. After the searchcoil is used in salt water, rinse it and the lower stem assembly well with fresh water to prevent corrosion of the metal parts.
  • The searchcoil is waterproof but the electronics are not, so always prevent any moisture or water from entering the control housing and never allow the cable connectors to become submerged in water.
  • If working in or near water, or if there is a possibility of rain, use a protective weather resistant pouch or plastic bag to cover the control housing. Make sure it can “breathe” in order to ensure against condensation buildup inside.
  • After each use, clean the detector with a soft cloth to remove dust, moisture, or other contaminants.
  • When transporting the detector in a car during hot weather, store it on the floor of the passenger compartment if possible. Using a carry bag gives additional protection. In any case, never allow the detector to roll around unprotected in the trunk or back of a pickup truck.
  • Protect your detector from dust, moisture, and extreme temperatures during storage.
  • When shipping, use the original factory carton or similar heavy-duty container and provide a minimum one inch of padding around all parts.
  • Treat your detector as you would any sensitive electronic instrument. Though ruggedly constructed and designed to withstand the demands of normal treasure hunting, proper care is essential.

 


OPTIONAL ACCESSORIES

Tesoro metal detectors and genuine Tesoro accessories are sold only through independent Tesoro Authorized Dealers, who are almost always metal detectorists themselves. They can answer your questions about your Tesoro detector, what accessories may be helpful and about metal detecting in general.

See your Tesoro Authorized Dealer for more information and prices on optional accessories.

Scuff Covers

We highly recommend using a scuff cover to protect your searchcoil at all times. The scuff cover for the Cortés fitted with the 9 x 8 searchcoil is Tesoro Part # SCUF-9×8.

Searchcoils

The 9 x 8 concentric searchcoil provided with the Cortés is designed for best all-around performance. Optional searchcoils may add to your detector’s performance.

Smaller searchcoils give better “target separation”—that is, more distinct target response for metal objects buried closely together—which is very useful when hunting trashy sites. Very small searchcoils can deliver the best response and depth to small targets such as fine gold chains with some sacrifice in depth on larger objects. Larger searchcoils give a wider sweep, covering more ground, and provide greater depth especially on larger objects; however, they may not detect some very small objects such as half dimes and will have difficulty in very trashy areas.

Wide scan searchcoils ignore ground mineralization better than concentric searchcoils and may offer improved performance in extreme ground conditions.

Selecting the right optional searchcoil depends on factors such as what you are searching for and search site conditions. No one searchcoil is better than all the rest. Several optional interchangeable searchcoils are available for the Cortés. They are all easy to mount and require no special tools. See the coils section for a list of these searchcoils with the Tesoro part # and description.

Optional scuff covers are also available for any Tesoro searchcoil.

Headphones

Most metal detectorists prefer to use headphones instead of the detector’s built-in speaker. Headphones help block out background noise (such as wind) and make it easier to hear faint signals. Headphones with a built-in volume control will allow you to adjust the sound volume to your preference.

 


SPECIFICATIONS
Operating Frequency 10 kHz
Searchcoil Type Concentric
Searchcoil Size 9 x 8
Searchcoil Family Epsilon
Cable Length Approx. 3’
Audio Frequency Target ID Tones Approx. 350 to 800 Hz
Audio Frequency All Metal VCO Approx. 350 to 950 Hz
Audio Output 2¼” speaker and headphone jack
Headphone Compatibility ¼” stereo plug
Weight (may vary slightly) 2.98 lbs.
Battery Requirement Eight AA (alkaline)
Battery Life (typical) 10 to 20 hours
Optimum Temperature Range 30° to 100° F
Optimum Humidity 0 to 75% R.H.
Operating Modes No-motion All Metal
Silent Search Discriminate
Sum
Notch Narrow/Wide

 


Metal Detectorist’s Code of Ethics
  1. Always check federal, state, county and local laws before searching. It is your responsibility to “know the law.”
  2. Abide by all laws, ordinances or regulations that may govern your search and the area you will be in.
  3. Never trespass. Always obtain permission prior to entering private property, mineral claims, or underwater salvage leases.
  4. Do not damage, deface, destroy, or vandalize any property, including ghost towns and deserted structures, and never tamper with any equipment at the site.
  5. Never litter. Always pack out what you take in and remove all trash dug in your search.
  6. Fill all holes, regardless how remote the location. Never dig in a way that will damage, be damaging to, or kill any vegetation.
  7. Do not build fires, camp at or park in non-designated or restricted areas.
  8. Leave all gates and other accesses to land as found.
  9. Never contaminate wells, creeks, or any other water supplies.
  10. Be courteous, considerate, and thoughtful at all times.
  11. Report the discovery of any items of historic significance to the local historical society or proper authorities.
  12. Uphold all finders, search and salvage agreements.
  13. Promote responsible historical research and artifact recovery and the sharing of knowledge with others.

WARRANTY SERVICE

Your Tesoro metal detector is covered by a Limited Lifetime Warranty, the terms of which are listed below. If your metal detector should require service, you may return it to the Tesoro factory at the address below.

LIMITED LIFETIME WARRANTY

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

This instrument is warranted to be free of defects in material and workmanship as long as it is owned by the original consumer purchaser. This warranty is not transferable and is valid only if the warranty registration card has been completed and mailed within 10 days of purchase.

TESORO will, at its option, repair or replace any instrument covered by this warranty, without charge, except for transportation charges, at its factory in Prescott, Arizona.

This warranty excludes batteries, damage caused by leaky batteries, cable breakage due to flexing on body mount units, and wear of the searchcoil housing. Also excluded are instruments which have been abused, altered, or repaired by an unauthorized party.

Under the copyright laws this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable form, in whole or in part, without the prior written consent of Tesoro Electronics Incorporated, except in the manner described in this documentation.
© 2001 Tesoro Electronics Incorporated. All rights reserved. Printed in the United States.

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Tesoro DELEÓN Deleon De Leon Metal Detector OPERATOR INSTRUCTION MANUAL

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Tesoro DELEÓN Metal Detector OPERATOR INSTRUCTION MANUAL
 


 

CONGRATULATIONS!

Your new Tesoro DeLeón metal detector is part of a new series of detectors designed to provide you with many happy hours of enjoyment in the most rewarding hobby I can think of—treasure hunting. Ahead of you lie fascinating and exciting experiences as you step into the past— uncovering artifacts lost by past generations, or as you take pleasure in the great outdoors with family and friends searching for precious metals. I wish we could share these experiences with you, and all of us at Tesoro wish you the best of success.

Your Tesoro detector is capable of meeting your needs in a wide range of treasure hunting situations. As with any other metal detector, familiarity with this instrument is probably the limiting factor in determining how successful you can be. I recommend that you read this manual and fully understand how to operate this detector before attempting to use it in the field. As you become more familiar with your detector through practice, your rate of success will increase dramatically.

The DeLeón is a precision electronic instrument that will last for years if properly cared for. Treat it right and it won’t let you down.

 

 

 


GETTING STARTED – UNPACKING THE BOX

Your DeLeón was shipped with these parts:

1 Upper Pole Assembly

Fully assembled, including upper pole stem with handle grip, padded arm bracket and control housing.

1 Middle Pole Assembly With Pole Lock

1 ABS Lower Pole Assembly

Fully assembled, complete with two friction washers, mounting screw, and thumb nut.

1 9 x 8 Concentric Searchcoil With 3’ Cable

2 Battery Packs, Each With 4 AA Batteries

1 Velcro Arm Strap Set

1 Operator Instruction Manual

1 Warranty Card

If any of these items are missing, contact the Tesoro Authorized Dealer where you purchased your detector immediately.

Assembling the DeLeón is simple and requires no special tools. Just install the battery packs, mount the searchcoil on the lower pole assembly, connect the pole assemblies together, wrap the excess cable around the pole and plug the cable into the control housing. Finally, adjust the pole length and searchcoil angle and you’re ready!


INSTALLING THE BATTERY

The DeLeón is powered by 8 AA batteries divided into 2 compartments, which are located in the armrest housing.

Open the battery compartment under the armrest by gently grasping the bottom edge of the door and pulling outward and upward. (The door is hinged at the top.)

Remove the batteries by pressing down on the right side of the 4-pack battery holder so that the left side of the holder will pop up. Pull out the holder and replace the batteries as needed.

When returning the holder, note the position of the spring clips the armrest housing and make sure that the battery pack contacts fit snugly against the springs. Insert the side with the contacts first and then down on the left edge of the battery holder to reseat the holder.

Snap compartment cover to close.


ASSEMBLING YOUR DETECTOR
    1. On the lower pole assembly, remove the mounting screw and thumb nut from the pole tip.
    2. Insert the pole tip between the mounting ears of the searchcoil and align the holes of the pole tip and washers with those of the mounting ears.
      Note: The pole tip should fit very snugly into the mounting ears.

 

    1. Insert the mounting screw through the holes in the mounting ears and pole tip—entering from the side opposite the cable connection.
    2. Install the thumb nut on the mounting screw and tighten by hand.
      Note: Do not overtighten the thumb nut. It should be snug but not too difficult to loosen up.
    3. On the middle pole assembly, depress the two spring buttons and slide the middle pole assembly into the upper pole assembly until the spring buttons click into the holes, thus locking the two assemblies into place. Tighten the pole lock to secure the two assemblies together.

 

  1. Slide lower pole into middle pole until the spring buttons click into the first set of adjustment holes. Turn pole lock to tighten the assembly into place.
  2. Wrap the cable around the pole leaving enough slack near the searchcoil to permit searchcoil adjustment. Note: Do not allow the cable to flop loosely over the searchcoil. Since the detector is sensitive enough to “see” the tiny wires in the cable, a floppy cable can cause false signals as the searchcoil senses the moving wires.
  3. Plug the male cable end into the female connector on the control housing and tighten the cable thumb nut. You are finished!
    Note: You will want to adjust the pole length and the searchcoil angle to your preference.
    Note: We have included an optional Velcro arm strap with your DeLeón detector. To install, remove the backing on the two smaller hook patches and press firmly to sides of arm cup. Adjust strap to provide snug comfortable fit.

ADJUSTING THE POLE & SEARCHCOIL

The pole length should be adjusted so that the detector does not become uncomfortable or tiring after long periods of use. The detector grip should rest in your hand with your arm relaxed, your elbow straight but not locked, with the pole extending out in front of you at the approximate angle shown in the photo.

You should be able to swing the detector back and forth in front of you—using relaxed shoulder movement—while keeping the searchcoil as close to the ground as possible. This swinging movement is often called a “sweep.”

The searchcoil should not touch the ground during your sweep. The pole length should be adjusted to allow this without having to lift the detector with your elbow or shoulder. The searchcoil should rest about one inch above the ground while you are standing erect. The angle of the searchcoil should allow the bottom to be parallel to the ground.

The pole length is adjusted by loosening the pole lock, then depressing the spring buttons and extending or shortening the pole until the spring buttons click into the set of holes that give you the most comfortable pole length.

To adjust the searchcoil angle, simply loosen the searchcoil thumb nut slightly and move the searchcoil into the desired position. Tighten the searchcoil thumb nut by hand so that the searchcoil will hold in place.


QUICKSTART – SELF-GUIDED TUTORIAL

The Quickstart is designed to teach you how to use your new DeLeón. It provides a quick and easy means of learning your detector and the concepts behind all the functions.

You will need the following items:

  1. Your fully assembled DeLeón.
  2. An iron target (a small nail or screw will do), an iron washer, a nickel, a zinc penny (1982 or later), a quarter and a couple of different pull tabs.
  3. A nonmetal table top or counter.

Here’s what you will do:

  1. Check Display Readings in DISC Mode
  2. Adjust SENSITIVITY
  3. Perform Air Test in DISC Mode
  4. Adjust THRESHOLD
  5. Perform Air Test in ALL METAL Mode
  6. Perform BATT TEST
Prepare for the Quickstart

Place your assembled DeLeón on the nonmetal surface. Make sure that there are no metal objects near the coil and remove any jewelry from your hands and wrists.

Start with the controls like this:

  1. THRESHOLD, SENSITIVITY and DISCRIMINATE LEVEL knobs turned completely counterclockwise.
  2. MODE switch in the DISC setting.

Check Display Readings in DISC Mode

Turn the SENSITIVITY knob from OFF to about 2-3. In the first couple of seconds, you may or may not hear a slight hum that will fade away and the display will read TESORO, DELEON and DISC. As long as these three screens show up, you can be assured that your DeLeón has started up properly.

The Tesoro DeLeón is a Target Identification Detector or T.I.D. The most important feature is the 1 by 8 character display found on the upper half of the detector faceplate. At this time the only thing that should be showing in your display is the word DISC.

Pass any target over the coil and read the display. The information displayed is unimportant at this moment. After about 6 to 10 seconds, the screen clears and the word DISC will appear again. The DeLeón will clear the display screen after that amount of time so you will be able to visually see a target even if you do not get an audio response. You may want to take some time to try this out.

As you wave the targets, you will notice that the display has three key areas that contain information: the Coin Depth indicator, the 5 segment bar graph area and the 2 digit ID Number. All of the different areas will be used together to determine the most likely identification of the target while it is still in the ground. As you practice, please note that different distances from the coil, orientation of the target and width of sweeps or passes over the coil may produce a variety of slightly different but distinct display readings.

NOTE: A target identification detector is never 100% accurate. If you get a strong positive audio signal when hunting, dig it, no matter what the display shows. Digging the good audio/bad display target will result in better finds over the long run than ignoring those signals.

Starting from the left-hand edge, you will find the COIN DEPTH indicator. This section will let you know the approximate depth of the target. The next section is a 5 segment bar graph. It will show all of the information that the detector saw during the entire coil sweep. Full sweep information is helpful in determining possible treasure/trash masking and odd-shaped iron. The last section is the ID NUMBER. The ID NUMBER shows the peak part of the signal as a two digit number from 0 to 95. Iron reads as 0 and copper and silver coins read 95. All other targets will read somewhere in-between. Take some time to try all your targets and notice the different readings that you get.

The best distance from the coil is somewhere between 4 and 8 inches. If you get closer, you will notice the display will show a series of arrows pointing upwards or the words “LIFT COIL.” Either one of these display readings indicates that there is too much signal for the microprocessor to handle properly. When the arrows are showing, the display will show as much information as it possibly can. Once the overload is too great, the display will show “LIFT COIL.” Moving the target away from the coil will result in a more accurate reading. When using the DeLeón in the field, lifting the coil will accomplish the same result.

Below are some of the possible readings from various targets. These are not exact and your machine may read slightly different. Take the time to learn the readings and responses for your machine, both in the air test and in the ground.

Small Iron Target (Screw or Nail): You may or may not get an audio signal depending on the size and shape of the target. However, you will get a meter reading.

Iron Washer or Odd-Shaped Iron: Odd-shaped iron targets or iron targets that have holes can fool many machines. As it starts to pass under the edges of the coil, it produces a signal that looks like a silver coin. But as it nears the center of the coil, the signal shifts to a more traditional iron signal. Notice the following two illustrations. In the first, the bar graph shows a small peak in the silver bar and the ID number reads 0. In the second, the bar graph shows iron but the ID number reads 85.


The thing that both of these illustrations have in common is that various segments of the display do not “agree” with each other. This is a sure sign that you are detecting an odd-shaped piece of iron. Notice on the rest of the illustrations that the bar graph and the ID number show about the same information. When the ID number and the graph “agree,” you can be sure that your DeLeón is receiving a clean signal.

Adjust SENSITIVITY

The all metal circuit uses a single channel to detect various metals. The discriminate circuit uses two different channels, then amplifies and filters them. The detector will then compare the signals and determine whether or not to beep at the target. While there is a great advantage to ignoring unwanted targets, it can make the circuitry more susceptible to interference. A number of outside conditions such as power lines, highly mineralized soil, and wet salt sand can cause interference.

The SENSITIVITY knob is used to raise or lower the power to the operational amplifiers, which changes the gain. Gain is a measurement of how much a signal is amplified. The higher the gain the more depth and sensitivity to small objects a detector has. Unfortunately, any small interference that is amplified can cause the detector to become erratic. The SENSITIVITY control is used to find the best gain setting in any location without letting the detector become unstable.

The SENSITIVITY knob is numbered from MIN to 10 and then has an orange area called the Max Boost Zone. For normal hunting, anywhere in the numbered zone will work very well. However, the Max Boost will allow you to increase the power to the operational amplifiers to the point of overload. This may cause your detector to become unstable and force you to turn the SENSITIVITY knob to a lower setting. An overload situation will not hurt your detector, but it will maximize the gain that is used by your detector. This can, in certain conditions such as low mineralization in the soil, cause your detector to penetrate deeper into the ground and become more sensitive to small targets.

Take some time to try waving targets in front of the coil with different sensitivity settings. Notice that the higher the sensitivity setting, the farther away from the coil that a target can be and still respond with an audio signal.

Perform Air Test in DISC Mode

The Discriminate Mode is used to filter unwanted targets from good targets. The principle behind this is pretty simple. The detector sends out a signal and then receives it back creating a small electronic field. As metal passes through the field that the detector generates, it causes a change in the received signal. The amount of change that each type of metal causes is fairly constant; therefore, we can tune our detectors to miss targets that we don’t want to find. The change is based on the amount of conductivity of each target type. The general list of conductive targets is as follows: iron, foil, nickels, gold jewelry, pull tabs, screw tabs, pennies and silver coins starting with dimes and working up to silver dollars. This is very easy to visualize using the bar graph. This list is meant to be a guide only. There is a point that some pull tabs, nickels and gold jewelry overlap. Also, the depth of the target and its orientation in the ground can change the received signal. A coin that is flat to the coil will produce a better signal than a coin that is on edge. Take some time to try different combinations of depths and orientation of your targets and find out how your detector responds.

We are now ready to discriminate targets from each other. We will start with the DISCRIMINATE LEVEL at MIN. Please notice that the DISCRIMINATE LEVEL knob has words that correspond to the items that are discriminated out. While performing the Air Test, notice that your DeLeón will continue to display target data for items that do not respond with an audio signal.

All of your targets, except the small iron, will respond with a good audio signal at the MIN setting. Next, we will turn the DISCRIMINATE LEVEL up to the 5¢ setting. This level is high enough to knock out the nickel. At this time the iron target and the nickel should give no response, while most of the pull tabs, the zinc penny and the quarter will give a solid response. The iron washer may fall out at some point or may give a choppy signal all the way up to MAX. But reading the display should give you the indication that it is odd-shaped iron. Next, turn the DISCRIMINATE LEVEL knob just past the PULL TAB marking. At this time most or all of the pull tabs should not give any audio signal. The zinc penny and the quarter should give a strong signal. Now, roll the DISCRIMINATE LEVEL all the way to MAX. Notice that the penny has stopped responding and only the quarter is still responding. The discrimination will not go high enough to lose most of the silver coins.

This Air Test was designed to quickly show you how your Discriminate Mode works. Each machine may be a little different from all others, so you may want to take some time and try different targets to find the responses of your machine. At a later date, you may want to build a test garden to test your detector in the field.

Adjust THRESHOLD

Flip the MODE switch to the center position. This will put your DeLeón into the ALL METAL Mode. The display screen will show AM. This is the indication that you are now in the ALL METAL Mode. The ALL METAL Mode is used to pinpoint. The DeLeón uses a factory preset ground balance in both the DISCRIMINATE and ALL METAL Modes. This should work fine for most hunting conditions.

To adjust the threshold tone, turn the THRESHOLD knob clockwise until you hear a slight but steady tone. You will have to turn the knob to somewhere between the 10 o’clock and 1 o’clock position to get the best hum.

In the field, some targets may be small enough or deep enough that they will not be able to generate an audio signal by themselves. By monitoring a threshold, you already have an audio signal so changes in volume will be easier to hear. However, if the threshold is set too soft or too loud, small changes in the signal will be hard to hear. Take some time to find the threshold level right for you.

Perform Air Test in ALL METAL Mode

Once you have set the correct threshold hum, you are ready to perform an Air Test in the ALL METAL Mode. Your DeLeón has a VCO style ALL METAL Mode. You will find that as targets get closer to the coil, the threshold tone will get louder and higher in pitch.

Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and slowly work your way closer to the coil. Then try starting from 6 inches away from the left or right of your coil and work your way to the center of the coil. Notice the changes of the audio signal. Your strongest signal will always be closest to the center of the coil. Additional information can also be learned by the signal strength and pitch. A smaller or deeper target will give a less noticeable change in the threshold than a larger or more shallow target will give. Take some time and try all of your targets at different depths to find out how your detector sounds.

Perform BATT TEST

Push the MODE Switch to the left most position marked BATT TEST and hold. This will activate the battery test. Release the switch and notice that it is spring loaded and will snap back into the center position. Press the switch back into the BATT TEST position and read the display screen. With fresh batteries, all eight of the display segments will show up. As the batteries lose power, fewer and fewer segments will show. When the batteries are close to failing, the display screen will show the words VERY LOW. It is highly recommended that you change your batteries before the VERY LOW appears on the display screen.

CONCLUSION

Congratulations, you have just finished the Quickstart for your new DeLeón and in the process have learned quite a lot about your detector. But experience is the best teacher. I would recommend that you get out and practice with your DeLeón as much as possible. Any time spent using your detector will give you valuable experience.

 


OPERATING TECHNIQUES

Handling Your Detector

The detector should be held in a position that is comfortable for you as shown in the “Adjusting The Pole & Searchcoil” section in GETTING STARTED. Swing the detector from side to side in about a three foot arc, overlapping succeeding strokes. This motion is called a “sweep.” The DeLeón was designed to get maximum depth without the frantic pace required of earlier motion detectors, so go at a pace that is comfortable for you. In fact, trying to hunt too fast may even cause a loss of depth in heavily mineralized locations.

Regardless of which mode you are using, try to keep your searchcoil height constant and close to the ground. Most people tend to raise the coil at the end of a sweep—much like a pendulum—especially if they are in a hurry. Try to avoid this as any increase in height from the ground will cause a corresponding loss of depth.

In areas with well-kept lawns, the easiest way to maintain a constant searchcoil height is to allow the coil to rest on the grass as you sweep from side to side. In rough and rocky areas, it is best not to “scrub” the coil on the ground, as the rocks will act like abrasives and wear away the coil bottom (an optional coil scuff cover will protect against this). Sweep the coil as close to the ground as possible without touching. Hitting the ground or rocks may cause a false signal, much like a desired target would. Sweeping the coil too high above the ground results in a loss of depth.

Pinpointing a Target

When pinpointing a target, the All Metal Mode can offer advantages over the Discriminate Mode, such as no false signals and no need to move the searchcoil to get a target response.

A good method for pinpointing in All Metal Mode is “X-ing” the target with the searchcoil. Remember that the target’s response sound is always greatest when the target is directly under the center of the searchcoil. To “X” a target, sweep the searchcoil over the target from side to side and then from front to back until you can identify the center of the X— the spot on the ground where the target response sound is the greatest.

Pinpointing a target in Discriminate Mode is probably best done by “X-ing” as well. Remember that the detector will beep just as the target passes under the center of the searchcoil. Slowing the sweep speed down will help you pick out the center of the X, but remember that the searchcoil must always be moving slightly for target detection.

Another easy method is to sweep the coil from side to side across the target in very short sweeps as you slowly move forward and backward across the target. Slow down the sweep rate and shorten the sweeps until you just barely get a response at one spot. The target will be directly below the coil center at this response time.

Another method of pinpointing in Discriminate Mode is to quickly change to the All Metal Mode to check the target response. Remember that the All Metal Mode is not susceptible to the false signals of the Discriminate Mode and can sometimes give a clearer and more consistent response to difficult targets such as a dime buried next to a pull tab. By switching back and forth between modes and comparing the target response sound in All Metal to the target response sound in Discriminate, you can often better identify the likely location of the target.

Finally, raising the searchcoil during pinpointing can also help by narrowing the response to the target. Practice pinpointing often, and you will soon become more accurate and faster.

Planting a Test Garden

To better learn how your detector will perform in the field, it would be helpful to bury some coins and trash metal junk items in an area that you know is clear of other metal objects, and then try the DeLeón in the All Metal & Discriminate Modes. Check the area in All Metal Mode to be sure it’s clear of trash. Then bury the targets at least 1 foot apart and from 2 to 4 inches deep to start. Make a map of the area to be sure you know what each target is and how deep it is. Practice on these targets to familiarize yourself with your detector’s target response. This will also help you learn the proper sweep speed for best operation. This type of practice area is often called a “test garden” or “test bed” and is one of the best tools to help you develop your metal detecting skills.

 


CARE AND USE

Basic Care

The DeLeón is a sturdy instrument, but it is not designed to withstand abuse. In caring for your DeLeón there are several important “DO NOTs” to remember. DO NOT use it to pry rocks loose or to beat bushes out of the way. DO NOT drop the machine into water. DO NOT use it unprotected in the rain. DO NOT leave it exposed at night where dew could form on it. DO NOT store it in places that could get extremely hot (next to a woodstove, in an attic). DO NOT leave it in the trunk of a car or in the back of a hatchback-style car where high temperatures could build up. DO NOT store it with the batteries installed as batteries may leak. DO NOT spray lubricants such as WD-40, or any type of cleaners, solvents, sealants or other chemicals into or onto the electronic parts, switches or controls. And finally, DO NOT attempt to modify or repair the detector’s electronics as this will void your detector’s warranty.

THE WARRANTY DOES NOT COVER DAMAGE RESULTING FROM AN ACCIDENT, NEGLECT OR ABUSE.

Protecting Your Investment

Often detectorists are disappointed when their new detector slowly becomes less and less responsive and seems to have lost some of its original peak performance. You can help avoid this from happening to your detector by following these basic care and protection guidelines:

  • Operate your detector exactly as recommended in this Operator Instruction Manual.
  • Use only high-quality alkaline batteries of the correct voltage. Never substitute a different voltage. When using a Ni-Cad battery, always use a separate convertible pack with the proper voltage output for the detector’s design.
  • Remove the battery from the detector after each use. This will prevent damage to the detector if the battery leaks.
  • The searchcoil cable is hard-wired to the searchcoil and protected by a strain relief. Inspect the strain relief frequently to make sure it is firmly attached and intact.
  • Keep cables properly wound around the pole stems and protect them during use. Floppy, pinched, or cables that become snagged during use may short, causing erratic noises or unnecessary replacement of the searchcoil.
  • Sweep the searchcoil carefully, especially when using around rocks and building foundations. Avoid hitting the searchcoil against hard, solid objects and surfaces.
  • Keep your searchcoil slightly off of the ground during the sweep, especially when using in gravel or hard, rocky dirt.
  • Always use a properly designed protective scuff cover on the searchcoil. (See “Optional Accessories” in the next section.)
  • Remove and clean out scuff covers periodically to avoid buildup of mineralized dirt particles which will affect performance.
  • The searchcoil is waterproof and can be submerged in either fresh or salt water. After the searchcoil is used in salt water, rinse it and the lower stem assembly well with fresh water to prevent corrosion of the metal parts.
  • The searchcoil is waterproof but the electronics are not, so always prevent any moisture or water from entering the control housing and never allow the cable connectors to become submerged in water.
  • If working in or near water, or if there is a possibility of rain, use a protective weather resistant pouch or plastic bag to cover the control housing. Make sure it can “breathe” in order to ensure against condensation buildup inside.
  • After each use, clean the detector with a soft cloth to remove dust, moisture, or other contaminants.
  • When transporting the detector in a car during hot weather, store it on the floor of the passenger compartment if possible. Using a carry bag gives additional protection. In any case, never allow the detector to roll around unprotected in the trunk or back of a pickup truck.
  • Protect your detector from dust, moisture, and extreme temperatures during storage.
  • When shipping, use the original factory carton or similar heavy-duty container and provide a minimum one inch of padding around all parts.
  • Treat your detector as you would any sensitive electronic instrument. Though ruggedly constructed and designed to withstand the demands of normal treasure hunting, proper care is essential.

 


OPTIONAL ACCESSORIES

Tesoro metal detectors and genuine Tesoro accessories are sold only through independent Tesoro Authorized Dealers, who are almost always metal detectorists themselves. They can answer your questions about your Tesoro detector, what accessories may be helpful and about metal detecting in general.

See your Tesoro Authorized Dealer for more information and prices on optional accessories.

Scuff Covers

We highly recommend using a scuff cover to protect your searchcoil at all times. The scuff cover for the DeLeón fitted with the 9 x 8 searchcoil is Tesoro Part # SCUF-9×8.

Searchcoils

The 9 x 8 concentric searchcoil provided with the DeLeón is designed for best all-around performance. Optional searchcoils may add to your detector’s performance. See all the accessory coils.

Smaller searchcoils give better “target separation”—that is, more distinct target response for metal objects buried closely together—which is very useful when hunting trashy sites. Very small searchcoils can deliver the best response and depth to small targets such as fine gold chains with some sacrifice in depth on larger objects. Larger searchcoils give a wider sweep, covering more ground, and provide greater depth especially on larger objects; however, they may not detect some very small objects such as half dimes and will have difficulty in very trashy areas.

Wide scan searchcoils ignore ground mineralization better than concentric searchcoils and may offer improved performance in extreme ground conditions.

Selecting the right optional searchcoil depends on factors such as what you are searching for and search site conditions. No one searchcoil is better than all the rest. Several optional interchangeable searchcoils are available for the DeLeón. They are all easy to mount and require no special tools. See the coils section for a list of these searchcoils with the Tesoro part # and description.

Optional scuff covers are also available for any Tesoro searchcoil.

Headphones

Most metal detectorists prefer to use headphones instead of the detector’s built-in speaker. Headphones help block out background noise (such as wind) and make it easier to hear faint signals. Headphones with a builtin volume control will allow you to adjust the sound volume to your preference.

 


SPECIFICATIONS
Operating Frequency 10 kHz
Searchcoil Type Concentric
Searchcoil Size 9 x 8
Searchcoil Family Epsilon
Cable Length Approx. 3’
Audio Frequency Approx. 350 to 950 Hz
Audio Output 2¼” speaker and headphone jack
Headphone Compatibility ¼” stereo plug
Weight (may vary slightly) 2.98 lbs.
Battery Requirement Eight AA (alkaline)
Battery Life (typical) 10 to 20 hours
Optimum Temperature Range 30° to 100° F
Optimum Humidity 0 to 75% R.H.
Operating Modes No Motion All Metal
Silent Search Discriminate

 


Metal Detectorist’s Code of Ethics

  1. Always check federal, state, county and local laws before searching. It is your responsibility to “know the law.”
  2. Abide by all laws, ordinances or regulations that may govern your search and the area you will be in.
  3. Never trespass. Always obtain permission prior to entering private property, mineral claims, or underwater salvage leases.
  4. Do not damage, deface, destroy, or vandalize any property, including ghost towns and deserted structures, and never tamper with any equipment at the site.
  5. Never litter. Always pack out what you take in and remove all trash dug in your search.
  6. Fill all holes, regardless how remote the location. Never dig in a way that will damage, be damaging to, or kill any vegetation.
  7. Do not build fires, camp at or park in non-designated or restricted areas.
  8. Leave all gates and other accesses to land as found.
  9. Never contaminate wells, creeks, or any other water supplies.
  10. Be courteous, considerate, and thoughtful at all times.
  11. Report the discovery of any items of historic significance to the local historical society or proper authorities.
  12. Uphold all finders, search and salvage agreements.
  13. Promote responsible historical research and artifact recovery and the sharing of knowledge with others.

WARRANTY SERVICE

Your Tesoro metal detector is covered by a Lifetime Warranty, the terms of which are listed below. If your metal detector should require service, you may return it to the Tesoro factory at the address below.

LIMITED LIFETIME WARRANTY

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

This instrument is warranted to be free of defects in material and workmanship as long as it is owned by the original consumer purchaser. This warranty is not transferable and is valid only if the warranty registration card has been completed and mailed within 10 days of purchase.

TESORO will, at its option, repair or replace any instrument covered by this warranty, without charge, except for transportation charges, at its factory in Prescott, Arizona.

This warranty excludes batteries, damage caused by leaky batteries, cable breakage due to flexing on body mount units, and wear of the searchcoil housing. Also excluded are instruments which have been abused, altered, or repaired by an unauthorized party.

Under the copyright laws this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable form, in whole or in part, without the prior written consent of Tesoro Electronics Incorporated, except in the manner described in this documentation.
© 2001 Tesoro Electronics Incorporated. All rights reserved. Printed in the United States.

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Tesoro LOBO SUPER TRAQ Metal Detector OPERATOR INSTRUCTION MANUAL

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Tesoro LOBO SUPER TRAQ Metal Detector OPERATOR INSTRUCTION MANUAL
 


 

CONGRATULATIONS!

Your new Tesoro LOBO SuperTRAQ Metal Detector is designed to provide you with many happy hours of gold nugget prospecting and metal detecting. Ahead of you lie fascinating and exciting experiences as you take pleasure in the great outdoors searching for the most beautiful of all precious metals. I wish we could share these experiences with you, and all of us at Tesoro wish you the best of success. Your LOBO SuperTRAQ is capable of meeting your needs in a wide range of gold prospecting and metal detecting situations. As with any other metal detector, familiarity with this instrument is probably the limiting factor in determining how successful you can be. I recommend that you read this manual and understand fully how to operate this metal detector before attempting to use it in the field. As you become more familiar with your metal detector through practice, your rate of success will increase dramatically. The LOBO SuperTRAQ is a precision electronic instrument that will last for years if properly cared for. Treat it right and it won’t let you down.

 

 

 


INTRODUCTION

To be successful in gold nugget prospecting with a detector you must:

  • Use a high-performance metal detector designed specifically for gold prospecting.
  • Learn how to use your metal detector properly.
  • Search where there is gold to be found.
  • Be persistent.

The LOBO SuperTRAQ metal detector is designed for gold prospecting. It will find both large and small gold nuggets. It will find nuggets smaller than a BB under good conditions. It will not find gold dust. Because the LOBO SuperTRAQ is sensitive to all kinds of metals and has Discrimination circuitry, it is also an excellent machine for finding all types of buried metal objects such as coins, relics, jewelry, etc.

This OPERATOR Instruction Manual is designed to help you learn to operate the detector properly for maximum performance in various search conditions. Complete instructions on how to properly operate the LOBO SuperTRAQ are found in the two main sections: PART 1 – GETTING STARTED and PART 2 – OPERATING TECHNIQUES.

If you are new to electronic gold prospecting and operating metal detectors, we highly recommend reading and following the entire GETTING STARTED section to develop the “feel” of your detector. Then, study and practice the OPERATING TECHNIQUES section to get the best performance from your detector.

If you are an experienced detectorist and are familiar with the concepts of metal detecting, you may want to go directly to the Operating Techniques section. Whatever your prior detecting experience is, the more skilled you become at operating this detector, the more rewarding your results will be.

Please keep this in mind: If there is no gold where you are searching, it won’t matter how good your metal detector is or how skilled and persistent you are. To learn more about where to search for gold, see your dealer for magazines and books on the subject.

 


PRODUCT DESCRIPTION

The LOBO SuperTRAQ features Tesoro’s latest electronic innovations including the SuperTRAQ Computerized Ground Mineral Tracking System. State-of-the-art circuitry and advanced design make the LOBO SuperTRAQ one of the finest gold nugget metal detectors available. Expanded Discrimination circuitry lets the LOBO SuperTRAQ double as a high-performance coin and relic hunting detector as well.

The LOBO SuperTRAQ is a Transmitter-Receiver (TR) type detector that operates in the Very Low Frequency (VLF) portion of the Radio Frequency (RF) spectrum. The detector uses three control knobs and two toggle switches to provide full VLF capabilities with fingertip adjustment of all controls.

The performance of this detector will satisfy the requirements of the serious gold nugget prospector and detectorist, whether experienced or a beginner. At the heart of the LOBO SuperTRAQ is a totally new circuit board developed from Surface Mount Technology. This circuit board helps provide ultra-smooth operation in the most difficult soil conditions along with greater depth and sensitivity to smaller gold nuggets.

The features found on the LOBO SuperTRAQ make its power both versatile and easy to use. The SuperTRAQ System automatically performs troublesome “ground balancing.” There are two Operating Modes: All Metal and Discriminate. Slight motion is required in either mode so the searchcoil will detect a target located directly under it. The All Metal Mode tuning is Fast Auto Tune that readjusts the threshold quickly after encountering a target. The Discriminate Mode is Silent Search. The fingertip PINPOINT switch helps identify a target’s exact location by momentarily switching to a No-Motion All Metal Mode without Auto Tune. The LOBO SuperTRAQ also features the added power and depth of Tesoro’s MAXBoost Sensitivity.

The LOBO SuperTRAQ comes standard with a 10” elliptical widescan searchcoil for best all-around performance with good rejection of ground mineralization—a most important feature for gold prospecting. A variety of optional, interchangeable searchcoils are also available, further adding to the versatility of this metal detector.

 


GETTING STARTED – UNPACKING THE BOX

Your Lobo SuperTRAQ was shipped with these parts:

1 Upper Pole Assembly

Fully assembled, including upper pole stem with handle grip, padded arm bracket and control housing.

1 Middle Pole Assembly With Pole Lock

1 ABS Lower Pole Assembly

Fully assembled, complete with two friction washers, mounting screw, and thumb nut.

1 10″ elliptical, widescan searchcoil with 8’ Cable

2 battery packs with 4 AA cell alkaline batteries each

1 Operator Instruction Manual

1 Tesoro Warranty Card

If any of these items are missing, contact the Tesoro Authorized Dealer where you purchased your detector immediately.

Assembly of the Lobo SuperTRAQ is simple and requires no special tools. Just install the batteries, mount the searchcoil on the lower pole assembly, connect the three pole assemblies, wrap the excess cable around the pole and plug the cable into the control housing. Finally, adjust the pole length and searchcoil angle and you’re ready!

 


INSTALLING THE BATTERIES

Your LOBO SuperTRAQ is equipped with a special battery test circuit so that you can always be sure you are getting top performance from the detector.

To install or replace the batteries, first make sure the THRESHOLD control is set to OFF—turned completely counterclockwise past the “click.”

Remove the battery door from the back of the control housing. Do this by pulling the battery door’s two nylatch plungers out until the door pops off.

Remove the battery packs. Place 4 fresh AA size alkaline cells into each pack, observing polarity as marked on the battery packs. Make certain the polarity snaps fit properly. A poor connection may cause the detector to act erratically or fail to operate completely.

Place the battery packs into the battery compartment without pulling or stretching the battery lead wires. Replace the battery door by placing the door into its original position and then pushing in on the nylatch plungers to lock the door into place.

 


ASSEMBLING YOUR DETECTOR

    1. Remove the mounting screw and thumb nut from the black nylon pole tip mounted on the end of the lower pole.
    2. Insert the pole tip between the mounting ears of the searchcoil and align the holes of the pole tip and washers with those of the mounting ears. Note: The pole tip should fit very snugly into the mounting ears.
    3. Insert the mounting screw through the holes in the mounting ears and pole tip—entering from the side opposite the cable connection.
    4. Install the thumb nut on the mounting screw and tighten by hand. Note: Do not overtighten the thumb nut. It should be snug, but not too difficult to loosen up.
    5. On both pole assemblies, turn the plastic lock nuts at the end of the poles completely clockwise to the unlocked position to allow one pole to fit into the other pole. On the middle pole assembly, depress the two spring buttons and slide the middle pole assembly into the upper pole assembly until the spring buttons click into the holes—locking the two assemblies into place. Tighten the pole lock to secure the two assemblies together. Slide the lower pole into the middle pole until the spring buttons click into the first set of adjustment holes. Turn pole lock to tighten—locking the assembly into place.
      Note: The plastic lock nuts will be used to eliminate any “slop” in the pole joint by turning it counterclockwise to the locked position.

 

 

  1. Wrap the cable around the pole leaving enough slack near the searchcoil to permit searchcoil adjustment. Note: Do not allow the cable to flop loosely over the searchcoil. Since the detector is sensitive enough to “see” the tiny wires in the cable, a floppy cable can cause false signals as the searchcoil senses the moving wires.
  2. Plug the male cable end into the female connector on the control housing and tighten the cable thumb nut. You are finished!

Note: You will want to adjust the pole length and searchcoil angle to your preference.


ADJUSTING THE POLE & SEARCHCOIL

The pole length should be adjusted so that the detector does not become uncomfortable or tiring after long periods of use. The detector grip should rest in your hand with your arm relaxed, your elbow straight but not locked, with the pole extending out in front of you at the approximate angle shown in the photo.

You should be able to swing the detector back and forth in front of you—using relaxed shoulder movement—while keeping the searchcoil as close to the ground as possible. This swinging movement is often called a “sweep.”

The searchcoil should not touch the ground during your sweep. The pole length should be adjusted to allow this without having to lift the detector with your elbow or shoulder. The searchcoil should rest about one inch above the ground while you are standing erect. The angle of the searchcoil should allow the bottom to be parallel to the ground.

The pole length is adjusted by depressing the spring buttons and extending or shortening the pole until the spring buttons click into the set of holes that give you the most comfortable pole length.

To adjust the searchcoil angle, simply loosen the searchcoil thumb nut slightly and move the searchcoil into the desired position by hand. Tighten the searchcoil thumb nut by hand so that the searchcoil will hold in place.

 


QUICKSTART – SELF-GUIDED TUTORIAL

The QuickStart is designed to help you use your new LOBO SuperTRAQ metal detector right away, even if you have never used a detector before. Just follow each easy step carefully and you will learn how to set up your detector for basic use. You will also be introduced to some important concepts such as All Metal Operation (ALL MET) and Discrimination (DISC) along the way.

Here’s what you will need:

  • Your fully assembled LOBO SuperTRAQ
  • Three newer coins: a penny*, a nickel and a quarter
  • A nonmetal table or counter surface
  • Approximately 20 minutes to complete the QuickStart

*must be 1984 or newer—made of zinc

Here’s what you will do:

  1. Perform an Audio Battery test.
  2. Adjust the SENSITIVITY control.
  3. Adjust the THRESHOLD control.
  4. Perform an air test in All Metal Mode.
  5. Perform an air test in Discriminate Mode.
Before You Begin – Prepare for the QuickStart

Place your assembled LOBO SuperTRAQ on the nonmetal surface as shown in the photo below. Make sure there are no metal objects near the coil. Remove any jewelry from your hands and wrists.

IMPORTANT: Start out with these control settings:

  • THRESHOLD control set to OFF
  • Mode switch set to DISC
  • Ground selection switch set to NORMAL SOIL
  • SENSITIVITY control set to min
  • DISC LEVEL control set to min
Step 1 – Perform an Audio Battery
  • Test Turn the THRESHOLD control just past OFF

You will hear the battery test tone for a few seconds as the batteries are automatically tested. When the tone stops, the detector is on and the controls are ready for adjusting. NOTE: You should always perform the Audio Battery Test with Mode Switch set to DISC to avoid confusing the battery test tone with the ALL MET “threshold sound.”

Function Demonstrated in Step 1: How the battery test tone will tell you the batteries are working each time the detector is turned on.

WARNING! The Audio Battery Test Sound is quite LOUD. Do NOT put your headphones on before turning on the detector in the field.

Step 2 – Adjust the SENSITIVITY control
  • Turn the SENSITIVITY control from min to 8

This is a good setting to begin with each time you use your detector. Leave the control at this setting for the rest of the QuickStart.

Function Demonstrated in Step 2: Where to set the SENSITIVITY control for basic metal detector operation.

Step 3 – Adjust the THRESHOLD control
  • Flip the MODE switch to ALL MET

When the threshold control is turned to approximately the “9:00 o’clock” position (just past OFF), there is no sound from the detector.

  • Turn the THRESHOLD control clockwise

As the control gets to approximately the “12:00 o’clock” or “1:00 o’clock” position, you will begin to hear a slight sound. Turn the control a little further until you hear a clear tone. (Turning the control completely clockwise will result in a fairly loud noise!) Listen to the continuous, fairly even tone. This is called the “threshold sound.” You will hear the threshold sound only when operating the detector in All Metal Mode.

Turn the control back counterclockwise until the sound is barely audible. Leave the control at this setting for the rest of the QuickStart.

Function Demonstrated in Step 3: How to set the THRESHOLD control for basic All Metal operation.

Step 4 – Perform an air test in All Metal Mode

There are 3 sections in Step 4:

  1. Identify the Target Response
  2. Retune the Threshold (Auto Tune)
  3. Use the Pinpoint Feature

Identify the Target Response

Hold the quarter in your fingertips and move the quarter from side to side about 12 inches in front of the searchcoil.

Gradually move the quarter closer to the searchcoil—as you continue to move it from side to side—until you hear the threshold sound increase. This increase in volume is called the “target response sound.”

Continue to move the coin to test the target response sound. As you do this, try varying the distance or angle of the coin. Try varying the speed you move the coin. Try passing it in front of the edge of the searchcoil and then under the center. Notice the differences in the target response sound with each change.

Repeat the test with each coin. Notice that the detector responds to each coin although the target response sound may vary, sometimes subtly. Your detector will respond to objects made of any kind of metal when the object is in the searchcoil’s sensitivity area or “range.” A detector operating in a mode that responds to all types of metal targets is referred to as “All Metal Mode.”

Retune the Threshold

Hold the quarter still about 2 to 4 inches from the searchcoil, in line with the searchcoil center. Listen to the target response sound for 1 or 2 seconds. Do not move the quarter!

Notice that the target response sound will decrease to the regular level of the threshold sound in just a few seconds. This change in sound is the threshold being automatically retuned. Now, move the quarter from side to side, going past the edge of the searchcoil each time. Notice the regular threshold sound is gone and the target response sound is now a “beep” that occurs when the target passes in front of the searchcoil center. This threshold retuning technique is used in the field to “pinpoint” the exact location of a object.

Take the quarter away from the searchcoil and wait several seconds. Notice the regular threshold sound returns—as the detector automatically retunes the threshold to its original level. Move the quarter close to the searchcoil momentarily and notice the loud continuous target response sound has returned also. Take the quarter away again. A detector operating in this way is called “All Metal Mode with Fast Auto Tune.”

Use the Pinpoint Feature

Hold the quarter still near the searchcoil for a few seconds and notice the detector automatically retunes itself. Moving the coin from side to side will result in the target response sound becoming a “beep” as demonstrated in the previous section. While holding the quarter still near the center of the searchcoil, press and hold the mode switch to PINPOINT.

  • Mode switch held to PINPOINT

Then, while holding the switch to PINPOINT, try moving the coin from side to side. Notice that the normal threshold sound has returned and notice the target response sound is an increase in volume and not a “beep.” Take the quarter away from the searchcoil for a few seconds and try it again. Now, try this test with the different coins listening for the differences in the sounds the various coins make.

Holding the Mode switch in the PINPOINT position removes the Auto Tune until the switch is released. A detector operating in this way is referred to as “No-Motion Pinpointing” because motion is not needed to generate a target response. This technique is used in the field to “pinpoint” the exact location of a object.

Functions Demonstrated in Step 4: 1) How the All Metal Mode target response sound will vary depending on various factors such as what type of metal targets are buried in the ground, how deep they are, how fast you move your searchcoil and so on. 2) How the threshold is automatically retuned with Fast Auto Tune and how this affects the target response sound. 3) How the Pinpoint Mode removes the Auto Tune feature allowing motionless pinpointing.

Step 5 – Perform an air test in Discriminate Mode

There are 2 parts in Step 5:

  1. Identify the Target Response
  2. Use Discrimination
  • Flip the MODE switch to DISC
  • Leave the DISC LEVEL control set to min

Note: In Discriminate Mode, you will not hear the continuous threshold sound of the All Metal Mode.

Identify the Target Response

Hold the quarter in your hand and move the quarter back and forth about 12 inches in front of the searchcoil bottom.

Gradually move the quarter closer to the searchcoil—as you continue to move it back and forth—until you hear a “beep.” This beep is the target response sound.

Continue to move the coin to test the target response sound. As you do this, try varying the distance or angle of the coin. Try varying the speed you move the coin. Try holding the coin still then moving it slightly. Notice the differences in the target response sound with each change.

Repeat the test with each coin. Notice that the detector responds to each coin although the target response sound may vary. Your detector can respond to objects made of any kind of metal if there is movement between the object and the detector. A detector operating in this way is called “Silent Search.”

Use Discrimination

  • Turn the DISC LEVEL control from min to max

Pass the quarter back and forth in front of—and close to—the searchcoil bottom. Notice the sound as the coin nears the center of the searchcoil. Now, try this with the nickel and then the zinc penny. Notice there is no sound with these two coins. The ability of a metal detector to ignore certain types of metal is called “discrimination.” A detector operated in this way is referred to as “Silent Search Discriminate Mode.”

Control settings to ignore most zinc and nickel objects can be:

  • MODE switch: DISC
  • DISC LEVEL: max
  • Move the DISC LEVEL control from max to 7

Pass each of the three coins in front of the coil. Notice the quarter and the zinc penny now cause a target response sound.

Control settings to ignore most nickel objects can be:

  • MODE switch: DISC
  • DISC LEVEL: 7
  • Now move the DISC LEVEL control from 7 to 4

Pass each of the three coins in front of the searchcoil. Notice all three coins now cause a target response sound.

Control settings to include newer US coins while excluding most iron objects can be:

  • Mode Switch DISC
  • DISC LEVEL 4

Functions Demonstrated in Step 5: 1) The motion-based operation and target response sound of Silent Search Discriminate Mode. 2) How the Discriminate Mode can be used to help determine the types of metal a target may be. By adjusting the DISC LEVEL control, you can select what metals your detector will ignore.

CONCLUSION

Well done! You have finished the QuickStart Guide and have operated many of the basic detecting features of the LOBO SuperTRAQ. You have also been introduced to the ideas of: “All Metal Operation,” ”No-Motion Pinpointing,” “Silent Search Operation,” “Target Response Sound,” “Threshold Sound,” “Retuning the Threshold,” “Target Discrimination” and “Target Pinpointing.”

You are almost ready to begin the journey into the art of metal detecting by actually using your detector to find buried metal. But first a word about air tests.

The air tests in the QuickStart are of limited value. Metal detectors perform differently in air tests than when actually used “in the field.” Tesoro detectors are specifically designed to deliver the best performance in the field.

The CONTROLS and TUNING YOUR LOBO SuperTRAQ sections will give you more detailed information on how to set your detector’s controls for the best results—especially when selecting an operating mode and using discrimination.

Finally, the only way you can become truly proficient at using your detector to find gold nuggets and buried treasure is to use it in the field and learn from experience! However, we strongly suggest that you read this entire manual to become proficient with all of the features as you continue to use your detector.

You have the finest tool available, now all you need is the skill that comes from experience.

To Turn Your Detector OFF:

  • Turn The Threshold Control To OFFCounterclockwise past the “click.”

To Turn Your Detector ON:

  • Make Sure The Mode Switch Is Set To DISC
  • Turn The Threshold Control Past OFFCounterclockwise past the “click.”

REMEMBER: DO NOT PUT ON YOUR HEADPHONES UNTIL THE AUDIO BATTERY TEST IS OVER!

 


OPERATING TECHNIQUES – CONTROLS

The LOBO SuperTRAQ has only five controls, all mounted on the front panel of the housing for fingertip adjustment. How these controls should be set for peak performance will depend on the search site conditions, mineral content of the soil and so forth. Use the information in this section as a basis for setting the controls on your detector. Using your detector in the field will allow you to learn the detector’s response to various conditions and will guide you in fine tuning the detector’s operating controls.

THRESHOLD

On/Off Threshold Level Control

This rotary knob control has three functions:

  • Turns the detector ON and OFF
  • Activates the automatic Audio Battery Test
  • Adjusts the Threshold Level

Turning the THRESHOLD knob counterclockwise completely until it “clicks” into the OFF position turns the detector off by disconnecting the batteries from the circuit. NOTE: The detector should always be turned off when not in use.

Turning the THRESHOLD knob clockwise past the initial “click” turns the detector on and activates the automatic Audio Battery Test circuit. This test will give a sound, usually lasting several seconds, that indicates the battery condition. When the test is over, the detector’s Threshold Level can be adjusted.

The threshold is the loudness of the background hum. Most users prefer this background hum to be just barely audible in lightly mineralized ground, or a little louder in moderate to heavy mineralization. A few users like to silence ground noise by setting the THRESHOLD knob slightly below the threshold of audibility, but this will cause loss of some nuggets that would otherwise have been heard.

NOTE: It is best to turn the detector on in Discriminate Mode. Since the Discriminate Mode is a silent mode with no continuous threshold sound, it will be obvious when the Audio Battery Test is complete. If you turn the detector on in All Metal Mode, the Audio Battery Test sound will be immediately followed by the threshold sound. This may make it difficult to hear the Audio Battery Test end and discern the battery condition.

IMPORTANT: The battery test tone can be VERY LOUD. So, it is best to turn the detector on BEFORE putting headphones on to avoid the loud tone.

ALKALI NORMAL SOIL BLK SAND

Ground Selection Switch

NORMAL SOIL— This is the mode you’ll probably operate in over 95% of the time. In this mode, detector response is limited to a smaller range. This helps keep the unit from tuning out small metal targets and smoothes the sound caused by mineralization.

BLK SAND— This mode is similar to the NORMAL SOIL mode, but the sensitivity is reduced in order to accommodate extremely high concentrations of iron minerals such as magnetite black sand. The NORMAL SOIL mode will handle all but the most extreme conditions, and most users will never need to switch to the BLACK SAND mode. But it’s there if you need it, and it will handle the extreme soil that other machines can’t.

ALKALI— This mode is similar to the NORMAL SOIL mode except that the SuperTRAQ circuitry is allowed to operate over a much wider range of mineral signals. The ALKALI mode may allow the ground cancelling to be slightly less effective than the NORMAL SOIL mode.

PINPOINT ALL MET DISC

Mode Selection / Pinpoint Switch

This combination toggle switch has two functions:

  • Sets the operating mode: All Metal or Discriminate
  • Momentarily activates the Pinpoint mode

This toggle has three positions: Downward (DISC)—it locks in place and sets the operating mode to Discriminate. To the center (ALL MET)—it locks in place and sets the operating mode to All Metal. Upward (PINPOINT)—it activates the Pinpoint Mode (a No-Motion All Metal Mode with no Auto Tune) for as long as the switch is held in position. When the switch is released, it spring returns to the center position and returns the detector to the Fast Auto Tune All Metal Mode.

So, this combo switch functions as Mode Selection Switch when used in the lower and center locking positions. It also functions as a Pinpoint Switch by pressing the switch completely upward and holding it in place.

SENSITIVITY

Sensitivity Level Control

Turning the SENSITIVITY knob clockwise increases the detector’s Sensitivity Level. The level from min up to 10 is the normal range. This range corresponds with the normal Sensitivity on standard detectors. Turning the SENSITIVITY knob past 10 into the orange area puts the Sensitivity into the MAXBoost range found only on Tesoro detectors.

In lightly to moderately mineralized ground, you can usually set the SENSITIVITY knob to 10 (normal maximum). In highly mineralized ground, the noise from ground minerals will cover up sounds made from small or deeply buried targets if the SENSITIVITY knob is at 10—so, you will use a lower SENSITIVITY setting. A lower SENSITIVITY setting cuts back on target signals a little, but it cuts back on ground noise a lot more, allowing the target response to rise above the ground noise so you can hear it.

NOTE: The Sensitivity Level affects both operating modes (All Metal or Discriminate) and may require different settings for use in each mode.

DISC LEVEL

Discrimination Level Control

This rotary knob control has one function:

  • Adjusts the Discrimination Level

Once the detector is in the Discriminate Mode, the DISC LEVEL control is used to adjust the detector’s Discrimination Level. Turning the DISC LEVEL knob clockwise increases the detector’s Discrimination Level and vice versa.

NOTE: When operating in All Metal Mode, the DISC LEVEL control is not used.

 


TUNING YOUR LOBO SuperTRAQ

No matter which operating mode you are planning to use when you search with your metal detector, the detector cannot be expected to perform up to spec unless the Ground Adjust procedure is correctly performed so the unit operates as completely mineral free as possible. With manually adjusted units, this can be a procedure which may need to be done every few feet. Fortunately, the LOBO SuperTRAQ has a micro controller based Ground Tracking feature which essentially eliminates this tiresome procedure. The LOBO SuperTRAQ’s procedure is very simple and takes only a few seconds to do. It should be done each time you use the detector, no matter which mode of operation you plan to use.

Once the LOBO SuperTRAQ is properly ground balanced, it tracks the mineral conditions automatically as you hunt in the All Metal Mode. The automatic tracking is disabled when the detector is used in the Discriminate mode.

SuperTRAQ Ground Adjust Procedure
  1. Select a spot on the ground where you feel certain there are no metal targets. You can search for this spot in the all metal mode prior to performing this procedure.
  2. With the detector operating in the All Metal Mode, set the Ground Selection Switch in the Normal Soil position and the Sensitivity Control at 10.
  3. Raise and lower the searchcoil (from about one foot off the ground down to about two inches above the ground) fairly rapidly until you suddenly hear no further changes in the Threshold sound as the coil is raised and lowered. Typically the LOBO SuperTRAQ will do the ground balance in about three or four up and down motions. The detector is now properly ground balanced.

Note: The Ground Selection Switch should always be left in the Normal Soil position since that is where it gives the best ground balance and smoothest operation. If you cannot ground balance in the Normal Soil position, then move the switch to the Alkali position. This will give the circuitry a much broader window for ground balancing, but will yield rougher ground balance and increase the chances of small metal targets being rejected by the circuit. The Black Sand position should only be used when absolutely necessary since it cuts the gain of the input amplifier, which reduces the detector’s sensitivity. If it is necessary to use the Black Sand position, the decreased gain will yield a better chance of finding a good target in the black sand.

Selecting the Proper Operating Mode

The choice of which operating mode to use is really quite simple. If you intend to hunt for gold nuggets, you need to use the All Metal Mode. If you are interested in hunting for relics or caches which may be partially or completely ferrous in nature, you can use either mode, but if Discriminate is used, keep the Discriminate Level Control set at the min position so that ferrous targets are detected. If you want to hunt for any particular class of items, but don’t want to detect other unwanted items, you must use the Discriminate Mode. The Discriminate Level Control can be used to adjust the detector’s response to wanted/unwanted targets.

Operating in the All Metal Mode

Before beginning to operate in the All Metal Mode, perform the SuperTRAQ Ground Adjust procedure outlined above.

When operating in the All Metal Mode, the SuperTRAQ circuitry will automatically keep the detector’s ground balance set for maximum mineral free performance. It will resist tracking on small metal targets, but if for some reason the detector does become unbalanced, the simple act of raising and lowering the searchcoil several times will restore the ground balance.

The Ground Selection Switch should always be left in Normal Soil position unless the detector will not ground balance or you are operating in an area of heavy black sand. If the detector cannot properly ground balance, put the switch in the Alkali position. This will increase the amount of range the SuperTRAQ circuitry can balance out, but performance may be slightly less than when in Normal Soil position. The Black Sand position will cut the electronic gain of the input amplifier to prevent distortion due to the amplifier saturating from the large input signals caused by the black sand. It will decrease the overall sensitivity of the detector, but will make it much easier to find a target located in black sand.

The Sensitivity Control should always be at the highest level possible to yield smooth operation. If the detector becomes somewhat unstable at maximum sensitivity, stability can be restored by lowering the Sensitivity Control level. Reducing the Sensitivity Control level in order to gain stability will not cause an enormous loss of depth. It will give a better ability to see small targets, effectively yielding better depth.

Operating in the Discriminate Mode

Before beginning to search in the Discriminate Mode, perform the SuperTRAQ Ground Adjust procedure outlined above.

In the Discriminate Mode of operation, the Threshold sound will no longer be heard, since the LOBO SuperTRAQ uses Silent Search Discrimination. The Discrimination Level Control will set the effective good/bad rejection level desired. See the figure below, Discrimination Level Settings, to determine the approximate setting to reject the unwanted targets. The searchcoil needs to be moving slightly with respect to the target in order to find targets in Discriminate Mode.

The Sensitivity Level control should be kept as high as possible without causing unstable operation or false target signals. The MAXBoost area (denoted by the orange colored area above 10) can be used, but in some conditions the detector may become too noisy or erratic for good operation. Turning the Sensitivity Level control down slightly to restore stability will again give an apparent increase in depth by making the detector’s response easier to discern without having to separate the “good” signals from the “bad.”


FIELD USE PINPOINTING

Pinpointing with the LOBO SuperTRAQ can be accomplished easily in either the All Metal Mode or the Discriminate Mode. The detector also has a pinpoint position on its Mode Selection Switch labeled PINPOINT, which may make pinpointing even easier. In this position, the automatic threshold tuning is eliminated, and the gain is reduced, so it will be easy to tell where the loudest target response is located.

Move the searchcoil back and forth and forward and backward until you get the loudest audio response. The target should be directly below the searchcoil center at the time of loudest response. If the audio response is at maximum over a very broad range of movement, momentarily stop the searchcoil in the center of this area and release the pinpoint switch until the detector retunes itself back to threshold. Then press the switch back to the pinpoint position and continue moving the searchcoil to find the loudest response. This retuning in the middle of the loud area will greatly reduce the area of response.

You may have better luck pinpointing by “X-ing” the target. To do this, sweep the coil from side to side over the target until you determine the coil position when the loudest response is present. Make a mental note of this position, which will give you one of the lines of the X you are about to make. Turn 90 degrees to this line and sweep back and forth until you again get the loudest response. The position of the coil at this time should give you the other line, and the target is at the center of the X formed by these two lines. Dig where the two lines intersect.

Recovering Your Target

Even with the extreme power of the LOBO SuperTRAQ, pinpointing isn’t enough to recover your target. Since most of the really tiny nuggets look just like the rocks and other pieces of soil they are found in, they can be very difficult to locate. Also most of your targets will not be gold, they will be junk, such as nails, tacks, iron, pulltabs, etc. You will need to dig them all to be sure you don’t miss that occasional small piece of gold.

Your choice of a digging tool will be up to you, but most prospectors use a small pick axe and carry a magnet to help pick out iron targets. Some stores sell a pick axe with a magnet in the end of the handle.

When you have pinpointed your target, dig some of the soil back from the pinpointed area with your pick axe. Recheck with your detector to see if you have moved the target. If you haven’t, dig some more dirt out from the pinpointed area. When you succeed in moving the target, try the magnet to see if you can pick up the target. If the magnet doesn’t pick it up, you can try grabbing some dirt in your hand, and waving it over the detector’s coil. However, the LOBO SuperTRAQ will probably read the fleshy center part of your hand as being a good target, so it may be necessary to use your fingertips or use two plastic scoops to try to separate the target from the dirt.

Pick up a scoop full of dirt and pass it over the searchcoil of the detector to see if the target is in the scoop. If not, discard the dirt, and try another scoop. When the scoop contains the target, dump one half of the dirt from the first scoop to the second scoop. Try both scoops over the coil to see which one contains the target. Discard the dirt from the scoop which has no target and continue dividing and checking until you get the dirt down to a small enough sample that you can visually pick out the target.

If your target is big enough that you don’t have trouble separating it from the dirt, and if it is gold, then congratulations! Finding a large piece of gold makes the day a lot more enjoyable, but usually your gold targets will be small pieces.

BATTERY REPLACEMENT

The LOBO SuperTRAQ has an automatic battery test sequence with each initial power turn on. To check the batteries, simply turn the LOBO SuperTRAQ off for about five seconds, and then turn it back on. The battery test circuit will engage for about 3 to 5 seconds, with the audio output loudness indicating the remaining battery strength. As the batteries age, this tone will get quieter, and when you hear only a brief buzz or no output at all, it’s time to replace the batteries.

To replace the batteries, pull the large knobs on the battery door on the rear of the unit. The entire door will pop out. Remove the battery packs from the detector, and then remove the batteries from the packs. Replace the new penlight batteries into the packs, observing the polarity indicators that are embossed into the insides of the packs. Slide the packs back into the detector, making sure the battery clip leads are connected to the packs. Install the battery door back onto the chassis and push the nylon fasteners into the holes on the chassis, making sure that the plungers are still pulled out. Then push the plungers back in to lock the door in place.

GENERAL INFORMATION – CARE AND USE

If the detector is to be stored for a long period of time, it is best to remove the battery pack from the detector. This will prevent internal damage to the detector if the batteries should leak.

The searchcoil is waterproof and may be submerged in either fresh or salt water. Caution should be exercised to prevent water from entering the chassis, where it could damage the electronic circuitry. After the coil is used in salt water, the coil and lower stem assembly should be rinsed well with fresh water to prevent corrosion of the metal parts.

There are several good books to help the beginner learn how to use the detector, where to search and how to recover a target without damaging the environment. A good detectorist can recover a lot of finds and leave the area looking as though he had never been there. Above all, always fill your holes when you have recovered the target.

TESORO Metal Detectors are sold through independent dealers, who are almost always treasure hunters themselves. They can provide you with much needed information about how to use your detector, how to probe, plug and dig in your locale, and answer most of your questions about treasure hunting in general.

The use of earphones will benefit you in two ways. Most earphones will very effectively block out most of the ambient noise, such as traffic noise and wind noise, which will enable you to better hear the fainter signals caused by the deeper targets. Obviously, the older, more valuable coins will probably be deeper than the ones which were lost last week, so you should take advantage of anything that will help you hear the weaker signals. Secondly, using earphones will greatly extend the battery life, since it takes much less power to operate them. The LOBO SuperTRAQ is not equipped with a volume control, but does have a limited circuit in the earphone jack. If less volume is desired with earphones, you may want to use earphones with a built-in volume control. Any good 8 to 16 ohm set with ¼ inch stereo jack will do.

HAPPY HUNTING, and thank you for purchasing a TESORO.
 

 


SPECIFICATIONS
Operating Frequency 17.8 kHz
Searchcoil Type Elliptical, widescan
Searchcoil Size 10″ elliptical (length)
Searchcoil Family Delta
Cable Length Approx. 8’
Audio Frequency Approx. 330 Hz to 550 Hz
Audio Output 1½” speaker and headphone jack
Headphone Compatibility ¼” stereo plug
Weight (may vary slightly) 3.5 lbs. (may vary slightly)
Battery Requirement Eight AA cells (alkaline)
Battery Life (typical) 20 to 30 hours (typical)
Optimum Temperature Range 30° to 100° F
Optimum Humidity 0 to 75% R.H.
Operating Modes All Metal (motion required)
Silent Search Discriminate
All Metal Tuning Mode Fast Auto Tune
Pinpoint Mode No-Motion All Metal (no Auto Tune)

 


METAL DETECTORIST’S CODE OF ETHICS

Always check federal, state, county and local laws before searching. It is your responsibility to “know the law.”

Abide by all laws, ordinances or regulations that may govern your search and the area you will be in.

Never trespass. Always obtain permission prior to entering private property, mineral claims, or underwater salvage leases.

Do not damage, deface, destroy, or vandalize any property, including ghost towns and deserted structures, and never tamper with any equipment at the site.

Never litter. Always pack out what you take in and remove all trash dug in your search.

Fill all holes, regardless how remote the location. Never dig in a way that will damage, be damaging to, or kill any vegetation.

Do not build fires, camp at or park in non-designated or restricted areas.

Leave all gates and other accesses to land as found.

Never contaminate wells, creeks, or any other water supplies.

Be courteous, considerate, and thoughtful at all times.

Report the discovery of any items of historic significance to the local historical society or proper authorities.

Uphold all finders, search and salvage agreements.

Promote responsible historical research and artifact recovery and the sharing of knowledge with others.

 


WARRANTY SERVICE

Your Tesoro metal detector is covered by a Lifetime Warranty, the terms of which are listed below. If your metal detector should require service, you may return it to the Tesoro factory at the address below.

LIMITED LIFETIME WARRANTY

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

This instrument is warranted to be free of defects in material and workmanship as long as it is owned by the original consumer purchaser. This warranty is not transferable and is valid only if the warranty registration card has been completed and mailed within 10 days of purchase.

TESORO will, at its option, repair or replace any instrument covered by this warranty, without charge, except for transportation charges, at its factory in Prescott, Arizona.

This warranty excludes batteries, damage caused by leaky batteries, cable breakage due to flexing on body mount units, and wear of the searchcoil housing. Also excluded are instruments which have been abused, altered, or repaired by an unauthorized party.

Under the copyright laws this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable form, in whole or in part, without the prior written consent of Tesoro Electronics Incorporated, except in the manner described in this documentation.
© 2001 Tesoro Electronics Incorporated. All rights reserved. Printed in the United States.

 

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TESORO TEJÓN Tejon METAL DETECTOR OPERATOR INSTRUCTION MANUAL

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TESORO TEJÓN METAL DETECTOR OPERATOR INSTRUCTION MANUAL
 


 

CONGRATULATIONS!

Your new Tesoro Tejón metal detector is part of a new series of detectors designed to provide you with many happy hours of enjoyment in the most rewarding hobby I can think of—treasure hunting. Ahead of you lie fascinating and exciting experiences as you step into the past—uncovering artifacts lost by past generations, or as you take pleasure in the great outdoors with family and friends searching for precious metals. I wish we could share these experiences with you, and all of us at Tesoro wish you the best of success.

Your Tesoro detector is capable of meeting your needs in a wide range of treasure hunting situations. As with any other metal detector, familiarity with this instrument is probably the limiting factor in determining how successful you can be. I recommend that you read this manual and fully understand how to operate this detector before attempting to use it in the field. As you become more familiar with your detector through practice, your rate of success will increase dramatically.

The Tejón is a precision electronic instrument that will last for years if properly cared for. Treat it right and it won’t let you down.

 

 

 


GETTING STARTED – UNPACKING THE BOX

Your Tejón was shipped with these parts:

1 Upper Pole Assembly

Fully assembled, including upper pole stem with handle grip, padded arm bracket and control housing.

1 Middle Pole Assembly With Pole Lock

1 ABS Lower Pole Assembly

Fully assembled, complete with two friction washers, mounting screw, and thumb nut.

1 9 x 8 Monolithic Searchcoil With 42” Cable and Scuff Cover

2 Battery Packs, Each With 4 AA Batteries

1 Operator Instruction Manual

1 Warranty Card

If any of these items are missing, contact the Tesoro Authorized Dealer where you purchased your detector immediately.

Assembling the Tejón is simple and requires no special tools. Just install the battery packs, mount the searchcoil on the lower pole assembly, connect the pole assemblies together, wrap the excess cable around the pole, and plug the cable into the control housing. Finally, adjust the pole length and searchcoil angle and you’re ready!


INSTALLING THE BATTERY

The Tejón is powered by 8 AA batteries divided into 2 compartments, which are located in the armrest housing.

Open the battery compartment under the armrest by gently grasping the bottom edge of the door and pulling outward and upward. (The door is hinged at the top.)

Remove the batteries by pressing down on the right side of the 4-pack battery holder so that the left side of the holder will pop up. Pull out the holder and replace the batteries as needed.

When returning the holder, note the position of the spring clips inside the armrest housing and make sure that the battery pack contacts fit snugly against the springs. Insert the side with the contacts first and then press down on the left edge of the battery holder to reseat the holder.

Snap compartment cover to close.


ASSEMBLING YOUR DETECTOR
    1. On the lower pole assembly, remove the mounting screw and thumb nut from the pole tip.
    2. Insert the pole tip between the mounting ears of the searchcoil and align the holes of the pole tip and washers with those of the mounting ears.
      Note: The pole tip should fit very snugly into the mounting ears.

 

    1. Insert the mounting screw through the holes in the mounting ears and pole tip—entering from the side opposite the cable connection.
    2. Install the thumb nut on the mounting screw and tighten by hand.
      Note: Do not overtighten the thumb nut. It should be snug but not too difficult to loosen up.
    3. On the middle pole assembly, depress the two spring buttons and slide the middle pole assembly into the upper pole assembly until the spring buttons click into the holes, locking the two assemblies into place. Tighten the pole lock to secure the two assemblies together.

 

  1. Slide the lower pole into the middle pole until the spring buttons click into the first set of adjustment holes. Turn pole lock to tighten the assemblies into place.
  2. Wrap the cable around the pole leaving enough slack near the searchcoil to permit searchcoil adjustment. Note: Do not allow the cable to flop loosely over the searchcoil. Since the detector is sensitive enough to “see” the tiny wires in the cable, a floppy cable can cause false signals as the searchcoil senses the moving wires.
  3. Plug the male cable end into the female connector on the control housing and tighten the cable thumb nut. You are finished!
    Note: You will want to adjust the pole length and the searchcoil angle to your preference.


ADJUSTING THE POLE & SEARCHCOIL

The pole length should be adjusted so that the detector does not become uncomfortable or tiring after long periods of use. The detector grip should rest in your hand with your arm relaxed, your elbow straight but not locked, with the pole extending out in front of you at the approximate angle shown in the photo.

You should be able to swing the detector back and forth in front of you—using relaxed shoulder movement—while keeping the searchcoil as close to the ground as possible. This swinging movement is often called a “sweep.”

The searchcoil should not touch the ground during your sweep. The pole length should be adjusted to allow this without having to lift the detector with your elbow or shoulder. The searchcoil should rest about one inch above the ground while you are standing erect. The angle of the searchcoil should allow the bottom to be parallel to the ground.

The pole length is adjusted by loosening the pole lock, then depressing the spring buttons and extending or shortening the pole until the spring buttons click into the set of holes that give you the most comfortable pole length.

To adjust the searchcoil angle, simply loosen the searchcoil thumb nut slightly and move the searchcoil into the desired position. Tighten the searchcoil thumb nut by hand so that the searchcoil will hold in place.

 


QUICKSTART – SELF-GUIDED TUTORIAL

The Quickstart is designed to teach you how to use your new Tejón. It provides a quick and easy means of learning your detector and the concepts behind all of the functions.

You will need the following items:

  1. Your fully assembled Tejón
  2. AAn iron target (a small nail or screw will do), a nickel, a zinc penny (1982 or later), a quarter, and a couple of different pulltabs
  3. A nonmetal table top or counter.

Here’s what you will do:

  1. Prepare for the Quickstart
  2. Perform Audio Battery Test
  3. Adjust THRESHOLD
  4. Adjust Ground Balance for Air Test
  5. Perform Air Test in All Metal Mode
  6. Adjust TONE Control for All Metal Mode
  7. Adjust TONE Control for Disc Mode
  8. Adjust SENSITIVITY
  9. Perform Air Test in Disc Mode
  10. Activate TRIGGER SWITCH Mode
  11. Perform Air Test in ALT DISC LEVEL Mode
  12. Perform Air Test in Pinpoint Mode
Prepare for the Quickstart

Place your assembled Tejón on the nonmetal surface. Make sure that there are no metal objects near the coil and remove any jewelry from your hands and wrists.

Start with the controls like this:

  1. SENSITIVITY, DISC LEVEL and TONE turned completely counterclockwise past the click.
  2. THRESHOLD and ALT DISC LEVEL turned completely counterclockwise.
  3. GROUND ADJUST turned to the 12 o’clock position.
  4. TRIGGER SWITCH Mode in the center position (underneath housing).
Perform Audio Battery Test

Turn the SENSITIVITY knob clockwise just past the click to about 3 or 4. You should hear 6 to 7 quick beeps. This indicates that your batteries are fully charged and ready to go. As the batteries drain, you will hear fewer beeps. When you only hear 1 or 2 beeps, it will be time to replace your batteries. This test should be performed once or twice during your detecting outing. This will ensure that your machine has the correct battery power to maintain optimum detector performance.

Adjust THRESHOLD

To adjust the threshold tone, turn the THRESHOLD knob clockwise until you hear a slight but steady tone. You may have to turn the knob to somewhere between the 1 o’clock and 3 o’clock position to get the best hum. Please remember that the threshold only affects the all metal mode.

The purpose of the threshold tone is to give a reference to judge targets for pinpointing and to adjust the ground balance. (For more information on ground balancing, see the “Adjust Ground Balance for Air Test” section on the next page and the “Ground Balancing in the Field” section.)

In the field, some targets may be small enough or deep enough that they will not be able to generate an audio signal by themselves. By monitoring a threshold tone, you already have a slight audio tone so changes are easier to hear. However, if your threshold tone is set too soft or too loud, small changes in the signal will be hard to hear. Take some time and find a threshold level that is right for you.

Adjust THRESHOLD

The ground balance function for your Tejón is a form of discrimination that allows you to tune out the mineralization in the ground that may mask targets or decrease the detector’s depth and sensitivity. The GROUND ADJUST knob is on a 3 and ¾-turn potentiometer. While the knob will turn endlessly in either direction, when the potentiometer is at the end of its range, a slight drag may be felt.

Note: The following procedure is for the air test only. For directions on ground balancing your Tejón in the field, see the “Ground Balancing in the Field” section on page 16. For the best performance of your Tejón in the field, the machine must be ground balanced to the location in which you will be working.

To set the GROUND ADJUST knob for the air test, turn the knob four turns clockwise and then turn the knob one half turn counterclockwise. No further turns will be needed for the air test.

Perform Air Test in All Metal Mode

Once you have set the correct threshold tone and adjusted the ground balance, you are ready to perform the air test in the all metal mode. Your Tejón is currently in the VCO-style of all metal mode. You will find that as targets get closer to the coil, the threshold tone will get louder and higher in pitch.

Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and slowly work your way closer to the coil. Then try starting from 6 inches from the left or right of the coil and work your way into the center of the coil. Notice the changes of the audio signal. Your strongest signal will always be closest to the center of the coil. Additional target information can also be learned by the signal strength and pitch. A smaller or deeper target will give a less noticeable change in the threshold tone than a larger or shallower target will give. Take some time and try all of your targets at different depths to find out how your detector sounds.

Adjust Ground Balance for Air Test

The ground balance function for your Tejón is a form of discrimination that allows you to tune out the mineralization in the ground that may mask targets or decrease the detector’s depth and sensitivity. The GROUND ADJUST knob is on a 3 and ¾-turn potentiometer. While the knob will turn endlessly in either direction, when the potentiometer is at the end of its range, a slight drag may be felt.

Note: The following procedure is for the air test only. For directions on ground balancing your Tejón in the field, see the “Ground Balancing in the Field” section on page 16. For the best performance of your Tejón in the field, the machine must be ground balanced to the location in which you will be working.

To set the GROUND ADJUST knob for the air test, turn the knob four turns clockwise and then turn the knob one half turn counterclockwise. No further turns will be needed for the air test.

Perform Air Test in All Metal Mode

Once you have set the correct threshold tone and adjusted the ground balance, you are ready to perform the air test in the all metal mode. Your Tejón is currently in the VCO-style of all metal mode. You will find that as targets get closer to the coil, the threshold tone will get louder and higher in pitch.

Try waving your targets in front of the coil. Start from a distance of 10 to 12 inches away from the coil and slowly work your way closer to the coil. Then try starting from 6 inches from the left or right of the coil and work your way into the center of the coil. Notice the changes of the audio signal. Your strongest signal will always be closest to the center of the coil. Additional target information can also be learned by the signal strength and pitch. A smaller or deeper target will give a less noticeable change in the threshold tone than a larger or shallower target will give. Take some time and try all of your targets at different depths to find out how your detector sounds.

Adjust TONE Control for All Metal Mode

The Tejón has the ability to adjust the pitch of the all metal and discriminate audio signals to suit your audio tone preferences. Turn the TONE knob clockwise just past the click. Your Tejón will no longer operate in the VCO mode. The all metal will now only respond with a single tone for threshold tone and any target. Wave a target in front of the coil and notice the pitch of the audio tone. Continue waving the target as you slowly turn the TONE knob. You will find that the farther the TONE knob is turned clockwise, the higher in pitch the audio tone becomes. Take some time to try different tone settings.

Adjust TONE Control for Disc Mode

To adjust the tone for the discriminate mode, turn the DISC LEVEL knob clockwise just past the click. You are now in the discriminate mode. The first thing that you will notice is that the threshold has gone away. The Tejón works in a silent search discriminate mode. You will only hear a signal when there is a target beneath the coil. The TONE knob works the same way in discriminate as it does in the all metal mode. You may want to switch back and forth between the discriminate and all metal modes. You will notice that once the pitch has been set with the TONE knob, it remains the same in both modes. If you set the TONE knob back into the VCO setting, the discriminate will operate on a preset audio 10 TEJÓN OPERATOR INSTRUCTION MANUAL pitch. Take some time to try your targets with various settings and find the tone setting that is most comfortable for you.

Adjust SENSITIVITY

The most common use of the detector is to hunt in the disc mode and switch to the all metal to pinpoint a target. This will give you the advantage of ignoring unwanted targets and not having to listen to the threshold hum until you are ready to pinpoint and dig a target.

The all metal circuit uses a single channel to detect various metals. The discriminate circuit uses two different channels, then amplifies and filters them. The detector will then compare the signals and determine whether or not to beep at the target. While there is a great advantage to ignoring unwanted targets, it can make the circuitry more susceptible to interference. A number of outside conditions such as power lines, highly mineralized soil, and wet salt sand can cause interference.

The SENSITIVITY knob is used to raise or lower the power to the operational amplifiers, which changes the gain. Gain is a measurement of how much a signal is amplified. The higher the gain the more depth and sensitivity to small objects a detector has. Unfortunately, any small interference that is amplified can cause the detector to become erratic. The SENSITIVITY control is used to find the best gain setting in any location without letting the detector become unstable.

The SENSITIVITY knob is numbered from 1 to 10 with an orange area called the Max Boost Zone. For normal hunting, anywhere in the numbered zone will work very well. However, the Max Boost will allow you to increase the power to the operational amplifiers to the point of overload. This may cause your detector to become unstable and force you to turn the SENSITIVITY knob to a lower setting. An overload situation will not hurt your detector, but it will maximize the gain that is used by your detector. This can, in certain conditions such as low mineralization in the soil, cause your detector to penetrate deeper into the ground and become more sensitive to small targets.

Take some time to wave targets in front of the coil with different sensitivity settings. If you are indoors, you may find that you are unable to turn the SENSITIVITY knob as high as you would if you were outdoors. Notice that the higher the sensitivity setting, the farther away from the coil that a target can be and still respond with an audio signal.

Perform Air Test in Disc Mode

As discussed before, the discriminate mode is used to filter unwanted targets from good targets. The principle behind this is pretty simple. The detector sends out a signal and then receives it back creating a small electronic field. As metal passes through the field that the detector generates, it causes a change in the received signal. The amount of change that each type of metal causes is fairly constant; therefore, we can tune our detectors to miss targets that we don’t want to find. The change is based on the amount of conductivity of each target type. The general list of conductive targets is as follows: iron, foil, nickels, gold jewelry, pulltabs, screw tabs, pennies, and silver coins starting with dimes and working up to silver dollars. This list is meant to be a guide only. There is a point that some pulltabs, nickels, and gold jewelry overlap. Also, the depth of the target and its orientation in the ground can change the received signal. A coin that is flat to the coil will produce a better signal than a coin that is on edge. Take some time to try different combinations of depths and orientations of your targets to find out how your detector responds.

We are now ready to discriminate targets from each other. We will start with the DISC LEVEL at ALL METAL. Please notice that the DISC LEVEL knob has words that correspond to the items that are discriminated out. All of your targets will respond with a good audio signal at the ALL METAL setting. Next, we will turn the DISC LEVEL up to the 5¢ setting. This level is typically high enough to knock out the nickel. At this time, the iron target and the nickel should give no response, while most of the pulltabs, the zinc penny, and the quarter will give a solid response. Next, turn the DISC LEVEL knob just past the TAB marking. At this time, most or all of the pulltabs should not give any audio signal. The zinc penny and the quarter should give a strong signal. Now, roll the DISC LEVEL all the way to SCAP. Notice that the penny has stopped responding and only the quarter is still responding. The discrimination will not go high enough to lose most of the silver coins. When you are done with your air test, turn the DISC LEVEL knob counterclockwise to the IRON position.

This air test is designed to quickly show you how your discriminate mode works. Each machine may be a little different from all of the others, so you may want to take some time and try different targets to find responses of your machine. At a later date, you may want to build a test garden to test your detector in the field.

Activate TRIGGER SWITCH Mode

Your Tejón uses a TRIGGER SWITCH to change the operating mode. The TRIGGER SWITCH is a three-position switch that is springloaded on both ends and will always return to the center position when released (switch is located underneath housing).

The center position is the regular discriminate and is controlled by the lower discriminate knob marked DISC LEVEL. The knob is used to set the amount of discrimination that you would like to hunt with or to place the Tejón in a slow retune all metal mode.

Pulling the TRIGGER SWITCH toward the handle will place your Tejón into the pinpointing mode. This is a fast retune all metal mode. While the switch is pulled, you will hear a threshold tone.

Pushing the TRIGGER SWITCH forward away from the handle will place your Tejón into the alternate discriminate mode. The upper discriminate knob marked ALT DISC LEVEL controls this mode.

Flip the TRIGGER SWITCH back and forth and let it return to the center position.

Perform Air Test in ALT DISC LEVEL Mode

Leave the TRIGGER SWITCH in the center position and check all of your targets. The iron target should be knocked out, but all other targets should generate an audio response. If you are getting a target response from the iron, turn the DISC LEVEL knob high enough to discriminate it out.

Push the TRIGGER SWITCH forward and check the iron target again. At this time, you should get a target response. Take a moment or two flipping from the DISC LEVEL to the ALT DISC LEVEL using only the iron target. Notice how easy it is to discriminate out the target.

Set the ALT DISC LEVEL to the SCAP (screw cap) position. Leave the TRIGGER SWITCH in the center position. Check all of your targets. They should all sound off except the iron target. Push the TRIGGER SWITCH forward and check the targets again. The only target response should be from the quarter. With this particular DISC/ALT DISC setting, you will hunt for targets in the regular discriminate and check any targets that you find to see if they are silver coins or jewelry using the ALT DISC LEVEL mode.

Take some time to try other combinations of DISC LEVEL and ALT DISC LEVEL settings to find the ones that match your detecting style.

Perform Air Test in ALT DISC LEVEL Mode

Turn the DISC LEVEL knob all the way counterclockwise until it clicks. This will put you into the slow retune all metal mode. Hold a target over the center of the coil. After eight to ten seconds, the target signal will fade to the normal threshold signal. Move the target very slightly from left to right and forward and backward. As you move the target away from the center of the coil, the signal will fade into silence. Bringing the target back over the coil will result in a target signal. Take some time to find the strongest all metal signal over your coil.

Hold your target over the center of the coil and pull the TRIGGER SWITCH toward the handle of your Tejón. This will put you into the fast retune all metal or pinpointing mode. You will notice that the threshold hum will fade down to normal within three to four seconds. Move your target from right to left and forward and backward. Due to the fast retune, you will be able to move your target in shorter, faster arcs for fast pinpointing. When in the field, pulling the TRIGGER SWITCH into the pinpointing mode will allow you to tighten your coil sweeps to just a few inches and quickly pinpoint your target. Take some time to try the slow vs. fast retune features for the all metal mode.

Conclusion

Congratulations, you have just finished the Quickstart for your new Tejón detector and in the process have learned quite a lot about your detector. But experience is the best teacher. I recommend that you get out and practice with your detector as much as possible. Any time spent using your detector will give you valuable experience.

 


OPERATING TECHNIQUES
Ground Balancing in the Field

Ground balancing is not a difficult procedure, but it is critical if you desire maximum depth and stability. It is especially important if you plan to find deep relics or prospect for gold nuggets.

To ground balance in the field, we will start by assuming your detector is turned off. This will be the normal condition of your detector when you start hunting. Ground balancing can be done at any time while you are using the detector. It is not necessary to turn the machine off each time that you ground balance.

Start with the controls in the following positions:

  1. SENSITIVITY on OFF.
  2. Mode in the ALL METAL position. Your Tejón can be set into ALL METAL by turning the DISC LEVEL knob counterclockwise until it clicks and leaving the TRIGGER SWITCH in the center position or by simply pulling the TRIGGER SWITCH back toward the handle and holding it in place.
  3. All other controls will be set during the ground balancing procedure or are not applicable at this time.

Turn the detector on by rolling the SENSITIVITY knob clockwise to about 9 or 10 on the dial. You will hear the battery test to let you know the detector is operating. Next, adjust the THRESHOLD knob until a slight, steady hum is heard. The machine is now ready to be ground balanced. Next, find an area that has no metal targets in the ground, as this may give false readings while in the ground balancing procedure.

As shown in the photos, raise your searchcoil about 6 to 8 inches off the ground. This is high enough so that the detector will no longer read the minerals in the ground. While listening to the threshold sound, lower the searchcoil to about 1 inch off the ground. As the coil is dropped. This is the balanced response. When you get a balanced response, the detector is telling you that it is ready to hunt.

The positive and negative responses are easy to adjust. If you get a positive response, turn the GROUND ADJUST knob toward the minus sign on the face or in a counterclockwise direction. Getting a negative response means turning the GROUND ADJUST knob toward the plus sign on the faceplate or in a clockwise direction.

Here is an example of balancing: After setting up the detector, you raise the coil and then push it to the ground. As the coil drops, the threshold hum gets louder. You then turn the GROUND ADJUST knob counterclockwise toward the minus sign. You pick up the coil and push down again. This time you get a slightly negative response. Turn the GROUND ADJUST knob a little bit toward the positive or in a clockwise direction. When raising and lowering the coil, the threshold makes no change as the coil is dropped. At this point, the detector is balanced for the area and is ready to hunt.

Ground balancing is a learned skill, one that you should practice often. It is easy to practice almost anywhere— your front or backyard, a local park, or a fair-sized flower garden. When you are practicing, make sure that there are no pieces of metal underneath your coil that may cause a target sound.

NOTE: Please remember that the coil must be lifted straight off the ground. Swinging the coil in an arc, like a pendulum, will cause false readings and will result in an improper ground balance.

Handling Your Detector

The detector should be held in a position that is comfortable for you as shown in the “Adjusting The Pole & Searchcoil” section in GETTING STARTED. Swing the detector from side to side in about a three foot arc, overlapping succeeding strokes well. This motion is called a “sweep.” The Tejón is designed to get maximum depth without the frantic pace required of earlier motion detectors, so go at a pace that is comfortable for you. In fact, trying to hunt too fast may even cause a loss of depth in heavily mineralized locations.

Regardless of which mode you are using, try to keep your searchcoil height constant and close to the ground. Most people tend to raise the coil at the end of a sweep—much like a pendulum—especially if they are in a hurry. Try to avoid this as any increase in height from the ground will cause a corresponding loss of depth.

In areas with well-kept lawns, the easiest way to maintain a constant searchcoil height is to allow the coil to rest on the grass as you sweep from side to side. In rough and rocky areas, it is best not to “scrub” the coil on the ground, as the rocks will act like abrasives and wear away the coil bottom (a coil scuff cover will protect against this). Sweep the coil as close to the ground as possible without touching. Hitting the ground or rocks may cause a false signal. Sweeping the coil too high above the ground results in a loss of depth.

Pinpointing a Target

When pinpointing a target, the all metal mode can offer advantages over the discriminate mode, such as no false signals and no need to move the searchcoil to get a target response.

Agood method for pinpointing in the all metal mode is “X-ing” the target with the searchcoil. Remember that the target’s response sound is always greatest when the target is directly under the center of the searchcoil. To “X” a target, sweep the searchcoil over the target from side to side and then from front to back until you can identify the center of the X—the spot on the ground where the target response sound is the greatest.

Pinpointing a target in the discriminate mode is probably best done by “X-ing” as well. Remember that the detector will beep just as the target passes under the center of the searchcoil. Slowing the sweep speed down will help you pick out the center of the X because the target response is reduced at very slow speeds making it easier to correlate the sound with the coil center.

Another easy method is to sweep the coil from side to side across the target in very short sweeps as you slowly move forward and backward across the target. Slow down the sweep rate and shorten the sweeps until you just barely get a response at one spot. The target will be directly below the coil center at this response time.

Another method of pinpointing in the discriminate mode is to quickly change to the all metal mode to check the target response. Remember that the all metal mode is not susceptible to the false signals of the discriminate mode and can sometimes give a clearer and more consistent response to difficult targets such as a dime buried next to a pulltab. By switching back and forth between modes and comparing the target response sound in all metal to the target response sound in discriminate, you can often better identify the likely location of the target.

Finally, raising the searchcoil during pinpointing can also help by narrowing the response to the target. Practice pinpointing often, and you will soon become more accurate and faster.

Planting a Test Garden

To better learn how your detector performs in the field, it is helpful to bury some coins and trash metal junk items in an area that you know is clear of other metal objects, and then try the Tejón in the all metal & discriminate modes. Check the area in the all metal mode to be sure it’s clear of trash. Then bury the targets at least 1 foot apart and from 2 to 4 inches deep to start. Make a map of the area to be sure you know what each target is and how deep it is. Practice on these targets to familiarize yourself with your detector’s target response. This will also help you learn the proper sweep speed for best operation. This type of practice area is often called a “test garden” or “test bed” and is one of the best tools to help you develop your metal detecting skills.

CARE AND USE
Basic Care

The Tejón is a sturdy instrument, but it is not designed to withstand abuse. In caring for your Tejón, there are several important “DO NOTs” to remember. DO NOT use it to pry rocks loose or to beat bushes out of the way. DO NOT drop the machine into water. DO NOT use it unprotected in the rain. DO NOT leave it exposed at night where dew can form on it. DO NOT store it in places that can get extremely hot (next to a woodstove, in an attic). DO NOT leave it in the trunk of a car or in the back of a hatchback- style car where high temperatures can build up. DO NOT store it with the batteries installed as batteries may leak. DO NOT spray lubricants such as WD-40, or any type of cleaners, solvents, sealants or other chemicals into or onto the electronic parts, switches, or controls. And finally, DO NOT attempt to modify or repair the detector’s electronics as this will void your detector’s warranty.

THE WARRANTY DOES NOT COVER DAMAGE RESULTING FROM AN ACCIDENT, NEGLECT OR ABUSE.

Protecting Your Investment

Often detectorists are disappointed when their new detector slowly becomes less and less responsive and seems to have lost some of its original peak performance. You can help avoid this from happening to your detector by following these basic care and protection guidelines:

  • Operate your detector exactly as recommended in this Operator Instruction Manual.
  • Use only high-quality alkaline batteries of the correct voltage. Never substitute a different voltage. When using a Ni-Cad battery, always use a separate convertible pack with the proper voltage output for the detector’s design.
  • Remove the battery from the detector after each use. This will prevent damage to the detector if the battery leaks.
  • The searchcoil cable is hard-wired to the searchcoil and protected by a strain relief. Inspect the strain relief frequently to make sure it is firmly attached and intact.
  • Keep cables properly wound around the pole stems and protect them during use. Floppy, pinched, or cables that become snagged during use may short, causing erratic noises or unnecessary replacement of the searchcoil.
  • Sweep the searchcoil carefully, especially when using around rocks and building foundations. Avoid hitting the searchcoil against hard, solid objects and surfaces.
  • Keep your searchcoil slightly off of the ground during the sweep, especially when using in gravel or hard, rocky dirt.
  • Always use a properly designed protective scuff cover on the searchcoil. (See “Optional Accessories” in the next section.)
  • Remove and clean out scuff covers periodically to avoid buildup of mineralized dirt particles which will affect performance.
  • The searchcoil is waterproof and can be submerged in either fresh or salt water. After the searchcoil is used in salt water, rinse it and the lower stem assembly well with fresh water to prevent corrosion of the metal parts.
  • The searchcoil is waterproof but the electronics are not, so always prevent any moisture or water from entering the control housing and never allow the cable connectors to become submerged in water.
  • If working in or near water, or if there is a possibility of rain, use a protective weather resistant pouch or plastic bag to cover the control housing. Make sure it can “breathe” in order to ensure against condensation buildup inside.
  • After each use, clean the detector with a soft cloth to remove dust, moisture, or other contaminants.
  • When transporting the detector in a car during hot weather, store it on the floor of the passenger compartment if possible. Using a carry bag gives additional protection. In any case, never allow the detector to roll around unprotected in the trunk or back of a pickup truck.
  • Protect your detector from dust, moisture, and extreme temperatures during storage.
  • When shipping, use the original factory carton or similar heavy-duty container and provide a minimum one inch of padding around all parts.
  • Treat your detector as you would any sensitive electronic instrument. Though ruggedly constructed and designed to withstand the demands of normal treasure hunting, proper care is essential.

 


OPTIONAL ACCESSORIES

Tesoro metal detectors and genuine Tesoro accessories are sold only through independent Tesoro Authorized Dealers, who are almost always metal detectorists themselves. They can answer your questions about your Tesoro detector, what accessories may be helpful, and about metal detecting in general.

See your Tesoro Authorized Dealer for more information and prices on optional accessories.

Scuff Covers

We highly recommend using a scuff cover to protect your searchcoil at all times. The scuff cover for the Tejón, fitted with the 9 x 8 monolithic searchcoil, is Tesoro part # SCUF-9×8.

Searchcoils

The 9 x 8 monolithic searchcoil provided with the Tejón is designed for the best all-around performance. Optional searchcoils may add to your detector’s performance.

Smaller searchcoils give better “target separation”—that is, more distinct target response for metal objects buried closely together—which is very useful when hunting trashy sites. Very small searchcoils can deliver the best response and depth to small targets such as fine gold chains with some sacrifice in depth on larger objects. Larger searchcoils give a wider sweep, covering more ground, and provide greater depth especially on larger objects; however, they may not detect some very small objects such as half dimes and will have difficulty in very trashy areas.

Widescan searchcoils ignore ground mineralization better than concentric searchcoils and may offer improved performance in extreme ground conditions.

Optional scuff covers are also available for any Tesoro searchcoil.

Headphones

Most metal detectorists prefer to use headphones instead of the detector’s built-in speaker. Headphones help block out background noise (such as wind) and make it easier to hear faint signals. Headphones with a builtin volume control will allow you to adjust the sound volume to your preference.

 


SPECIFICATIONS
Operating Frequency 17.2 to 17.6 kHz
Searchcoil Type Monolithic (Carbon Fiber)
Searchcoil Size 9 x 8
Searchcoil Family Delta
Cable Length Approx. 42 inches
Audio Frequency Approx. 215 to 830 Hz
Audio Output 2¼” speaker and headphone jack
Headphone Compatibility ¼” stereo plug
Weight (may vary slightly) 2.98 lbs.
Battery Requirement Eight AA (alkaline)
Battery Life (typical) 20 to 30 hours
Optimum Temperature Range 30° to 100° F
Optimum Humidity 0 to 75% R.H.
Operating Modes Slow Auto-Tune All Metal
Silent Search Discriminate
Alternate Silent Search Discriminate
Pinpoint Mode All Metal Fast Auto-Tune

 


Metal Detectorist’s Code of Ethics
  1. Always check federal, state, county and local laws before searching. It is your responsibility to “know the law.”
  2. Abide by all laws, ordinances or regulations that may govern your search and the area you will be in.
  3. Never trespass. Always obtain permission prior to entering private property, mineral claims, or underwater salvage leases.
  4. Do not damage, deface, destroy, or vandalize any property, including ghost towns and deserted structures, and never tamper with any equipment at the site.
  5. Never litter. Always pack out what you take in and remove all trash dug in your search.
  6. Fill all holes, regardless how remote the location. Never dig in a way that will damage, be damaging to, or kill any vegetation.
  7. Do not build fires, camp at or park in non-designated or restricted areas.
  8. Leave all gates and other accesses to land as found.
  9. Never contaminate wells, creeks, or any other water supplies.
  10. Be courteous, considerate, and thoughtful at all times.
  11. Report the discovery of any items of historic significance to the local historical society or proper authorities.
  12. Uphold all finders, search and salvage agreements.
  13. Promote responsible historical research and artifact recovery and the sharing of knowledge with others.

WARRANTY SERVICE

Your Tesoro metal detector is covered by a Lifetime Warranty, the terms of which are listed below. If your metal detector should require service, you may return it to the Tesoro factory at the address below.

LIMITED LIFETIME WARRANTY

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

This instrument is warranted to be free of defects in material and workmanship as long as it is owned by the original consumer purchaser. This warranty is not transferable and is valid only if the warranty registration card has been completed and mailed within 10 days of purchase.

TESORO will, at its option, repair or replace any instrument covered by this warranty, without charge, except for transportation charges, at its factory in Prescott, Arizona.

This warranty excludes batteries, damage caused by leaky batteries, cable breakage due to flexing on body mount units, and wear of the searchcoil housing. Also excluded are instruments which have been abused, altered, or repaired by an unauthorized party.

Under the copyright laws this documentation may not be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable form, in whole or in part, without the prior written consent of Tesoro Electronics Incorporated, except in the manner described in this documentation.
© 2001 Tesoro Electronics Incorporated. All rights reserved. Printed in the United States.

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