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Radio Shack

63-3008

Discovery 3

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Page created December, 2010

Similar, at least in appearance and features, to the Big Bud Pro SED. Some have said it is a clone of the SED, while it's also said it is not as good. I wonder why Radio Shack would want lesser performance for their version, but if so, it may have a been due to a bean-counter trying to cut costs. It's just as likely any perceived performance differences may have been due to a defect in the tested machine or variation during manufacture. I've never tried either model, so can't say one way or the other.

Scroll down to read the manual.


Scroll down or click here for an OCR Text scan of the original manual


Discovery 3 Metal Detector

(630-3008) Specifications Faxback Doc. # 32363

Weight: ........................................................... 3 lbs.

Power Requirement: ..................................... Two 9 V Batteries

Search Coil Size: ............................................ 7.25 Inches

Operating Frequency: ..................................... 6.6 kHz +/- 10%

Assembling your Discovery3 Metal Detector is easy and requires no special

tools. Just follow these steps:

1. Using the supplied bolt and nut with knobs, attach the searchcoil to

the lower stem.

2. Press the button on the upper end of the lower stem and slide the

lower stem into the upper stem.

Adjust the stem to a length that lets you maintain a comfortable

upright posture, with your arm relaxed at your side and the searchcoil

level to, and about 1/2 to 2 inches above the ground.

3. Wind the searchcoil cable around the stem. Leave enough slack in the

cable to let you adjust the coil when you are hunting on uneven

ground. Then tighten the knob at the end of the searchcoil.

NOTE: To adjust the coil, simply loosen the knob.

4. Insert the coil's plug into the matching connector on the control

housing. Be sure the holes and pins line up correctly.

CAUTIONS: Do not force the plug or you might damage it.

To disconnect the cable, pull out the plug. Do not pull on

the cable.

INSTALLING THE BATTERIES

Your metal detector requires two 9-volt alkaline batteries, such as Radio

Shack Cat. No. 23-553.

Follow these steps to install the batteries.

1. Press the battery compartment covers in the direction of the arrows.

2. Snap one battery onto each of the terminals, and place the batteries

inside the compartments.

3. Replace the compartment covers.

CAUTION: Only use fresh batteries of the required size and type.

NOTES: The low battery indicator lights briefly when you turn on

power, so you know the detector is working properly and the

batteries are good.

If the low battery indicator stays on continuously, replace the

batteries.

Many metal detector problems are caused by weak, dead, or

improperly connected batteries. If the detector does not come

on, has weak volume, will not tune properly, has erratic

operation, or drifts, replace the batteries.

You can extend battery life by using headphones.

Remove the batteries if you do not plan to use the detector for

a week or more.

USING HEADPHONES

Using headphones (not supplied) with your metal detector makes it easier to

identify subtle changes in the threshold levels for better detection

results, and also reduces drain on the batteries.

The detector has a stereo headphone jack. For the best sound, use stereo

headphones (such as Cat. No. 33-1029 or 33-1125).

To connect headphones, insert the headphones' 1/4-inch plug into the

headphone jack on the side of the detector's control housing.

Listening Safely

To protect your hearing, follow these guidelines when you use headphones.

Set the volume to the lowest setting before you begin listening.

After you begin listening, adjust the volume to a comfortable level.

Do not listen at extremely high volume levels. Extended high-volume

listening can lead to permanent hearing loss.

Once you set the volume, do not increase it. Over time, your ears

adapt to the volume level, so a volume level that does not cause

discomfort might still damage your hearing.

Traffic Safety

Do not wear headphones while operating your detector in traffic areas. This

can create a traffic hazard and is illegal in some areas.

Even though some headphones are designed to let you hear some outside

sounds when listening at normal volume levels, they still present a traffic

hazard.

Your Discovery3 Metal Detector is an example of superior design and

craftsmanship. The following suggestions will help you care for your metal

detector so you can enjoy it for years.

Handle the metal detector gently and carefully. Dropping it can damage

circuit boards and cases and can cause the metal detector to work

improperly.

Use and store the metal detector only in normal temperature

environments. Temperature extremes can shorten the life of electronic

devices and distort or melt plastic parts.

Wipe the metal detector with a damp cloth occasionally to keep it

looking new. Do not use harsh chemicals, cleaning solvents, or strong

detergents to clean the metal detector.

The coil is waterproof and can be submerged in either fresh or saltwater.

Be careful to prevent water from entering the chassis. After using the coil

in saltwater, rinse it (the coil) with fresh water to prevent corrosion of

the metal parts.

Modifying or tampering with the detector's internal components can cause a

malfunction and might invalidate your detector's warranty. If your detector

is not performing as it should, take it to your local Radio Shack store for

assistance.

Your Radio Shack Discovery3 Metal Detector is designed for versatility in

all areas of metal detecting and treasure hunting. The Discovery3 lets you

identify and locate precious metals with pinpoint accuracy. It can

distinguish between different types of metals and "tune out" the ones you

don't want to search for. You can use it to hunt for coins, relics,

jewelry, silver or gold, just about anywhere-even near the ocean!

The Discovery3's features include:

Dual LCD Displays - displays the type of metal being

detected and the depth reading at

the same time.

Ultra Slow Sweep VLF Discrimination - distinguishes between different

metals efficiently, even when the

detector is swung at slow speeds.

Three Tone Audio Discrimination - sounds distinctive tones for

different categories of metal

objects to make target

identification easier.

Notch and Auto Notch - let you distinguish between junk

and valuable metal objects, and

automatically reject junk targets.

OPTIONAL ACCESSORY

The best coil to use depends on where and what you will be targeting when

you are in the field. If you are looking for deeply-buried objects, a

medium sized coil, such as the standard coil that came with your detector,

is more efficient. If you are looking for tiny objects and coin-sized

objects that are not buried too deeply, a 4-inch coil might work better.

The Discovery 4-Inch Coil System (Radio Shack Cat. No 63-3009) is highly

sensitive and offers superior performance when hunting for small objects

(such as gold nuggets or small pieces of jewelry), or in mineralized or

highly trashed areas.

Because of its smaller size, the 4-inch coil has a narrower detection field

and is less susceptible to interference from trash items. This makes it

better able to isolate precious metals in trashy areas.

Once you become familiar with how your metal detector works, you can fine

turn it to make it less sensitive to interference and more selective in

what it finds. For example, you can make it tune out undesirable objects

and tune in precious metals, such as having it distinguish between iron and

gold.

ADJUSTING SENSITIVITY

Use SENSITIVITY to adjust the detector's sensitivity to conditions that can

cause it to respond erratically. For example, broadcasting antennas and

power lines can cause false signals.

Although SENSITIVITY does not affect the detector's sensitivity when the

toggle switch is set to ALL METAL, the target ID and depth readings might

be erratic if the sensitivity is set too high when the toggle switch is set

to DISC.

Rotate SENSITIVITY clockwise to increase, or counterclockwise to decrease

the detector's sensitivity. Always set SENSITIVITY as high as possible

while minimizing "ghost" signals.

ADJUSTING DISC/NOTCH

You can set DISC/NOTCH so the detector distinguishes between junk and

valuable metal objects, and only detects the types of objects that you want

to search for.

Using DISC

With POWER/mode set to DISC and the toggle switch in the left (DISC)

position, the control functions as a standard variable discriminator. As

you rotate DISC/NOTCH clockwise from its full counterclockwise position, it

rejects iron, foil, nickels, pull tabs, and screw caps (in that order).

Using NOTCH

When you set POWER/mode to NOTCH with the toggle switch in the left (DISC)

position, DISC/NOTCH functions as a variable notch rejection window. Then

you can adjust DISC/NOTCH to reject (or "notch out") selected types of pull

tabs or other trash.

For example, many types of gold rings are rejected along with nickels, but

you can eliminate some pull tabs without rejecting nickels.

NOTE: Some pull tabs or tab pieces cannot be distinguished from nickels

and gold rings.

To set the DISC/NOTCH position, use a pull tab or other object of the type

you want to reject.

1. Adjust DISC/NOTCH to FOIL.

2. Slowly turn DISC/NOTCH clockwise until the detector emits no sound.

NOTE: Check a nickel to be sure the Discovery3 still detects it.

With DISC/NOTCH properly adjusted, the Discovery3 detects nickels while

rejecting pull tabs.

Using AUTO NOTCH

With the toggle switch in the left (DISC) position and POWER/mode set to

AUTO NOTCH, the detector rejects most trash items and emits a low tone (for

gold and nickel) or a high tone (for copper, silver, and brass).

Expect some targets to be junk items, even if the detector emits a tone.

Besides nickel, other items that might emit a low tone include foil, some

pull tabs, and small gold rings. Besides copper and silver, other items

that might emit a high tone include brass and medals.

You can use DISC/NOTCH to widen the spectrum of discrimination. For

example, as you turn DISC/NOTCH clockwise, the detector rejects zinc

pennies.

Once your metal detector is assembled, it's time to learn how to use it.

Please read this section thoroughly before you use your Discovery3.

TURNING ON YOUR DETECTOR

Hold the detector in a comfortable position and turn it on by rotating

POWER/mode to DISC, NOTCH, or AUTO NOTCH. The detector sounds three beeps.

SETTING THE MODE

Your Discovery3 has two operating modes: ALL METAL and DISC

(discriminating).

In the ALL METAL mode, the detector sounds a tone for as long as the target

is under the searchcoil. For ALL METAL tuning, push the toggle switch to

TUNE, then release it to the center position.

In the DISC mode, the detector must be in motion to accurately detect an

item, and you can set it to reject iron and various levels of junk item.

For fine tuning, set the toggle switch to DISC (discriminate).

If you set the toggle switch to DISC, use POWER/mode to select the search

mode (DISC, NOTCH, or AUTO NOTCH). See "Fine Tuning" for instructions about

how to use the discriminate mode.

READING THE DISPLAY

The LCD display is located at the top of the control housing. The display

shows a probable identification of the object (on the target ID meter), as

well as its approximate depth (on the depth meter).

The target ID meter displays various coins and metal objects, and a range

from SILVER to GOLD. When the detector senses a target, <--- appears next

to the name of a coin or metal object to show you the type of object it

thinks it is detecting.

NOTE: When the arrow points to a coin, the detector could be sensing

either a coin or another type of metal (such as jewelry, tokens,

medals, or even junk metal).

The depth meter shows about how deep the object is. The window shows

numbers representing inches (from 0 to 10). Two arrows on the display point

to numbers to show a range of possible depths (SHALLOW, MEDIUM, or DEEP).

When the arrows point to 0 and 4, for example, this means the target is 4

inches or less below the surface.

NOTES: Sometimes only one arrow appears to indicate depth.

The depth meter is more effective at detecting small objects than

larger ones.

SWEEPING

Hold the detector in a position that is comfortable for you, as close to

the ground as possible without touching the ground. Sweep from side to side

in about a three-foot arc, at a pace that doesn't wear you out.

Sweep in a slightly overlapping pattern. The search signal peaks as you

pass a target's center.

Try to keep the searchcoil parallel to the ground at all times and avoid

lifting the coil off the ground at the end of each swing.

When you use the detector, some false signals can occur at the end of your

swing. The detector is most susceptible to "ghost" noise when the coil

reverses direction. "Ghost" signals do not repeat as you swing the

searchcoil over the suspected target several times; true target responses

repeat.

Very large (or many closely spaced) junk targets can also cause the

detector to emit "ghost" sounds. Generally these signals sound chopped and

do not repeat, and you can learn to recognize them.

In the ALL METAL mode, if the response is weak, it might be a good deep

target, but if it is very strong, the target is probably junk. When in

doubt, DIG. If you don't dig at all, you are surely passing up some good

finds!

HINTS: Hitting the ground or rocks can cause a false signal similar to the

sound of detecting a target.

If you sweep the coil too high above the ground, you will only be

able to detect targets near the surface.

If you receive a signal and you cannot determine the target, you

might have detected a combination of targets.

THREE TONE AUDIO TARGET IDENTIFICATION (ATI)

When the Discovery3 is in the discrimination (DISC) mode (with the toggle

switch to the left), its Audio Target Identification (ATI) system

automatically classifies metal objects into three categories, to make it

easier to identify your target.

The detector sounds three different tones to distinguish between categories

of detected items: a low tone for small gold and nickel; a medium tone for

most old and new pull tabs and some gold; and a high tone for copper,

silver, and brass.

NOTES: In the DISC mode, the detector does not sound a tone for iron and

steel.

The detector must be in motion to make a detection in the DISC

mode.

ADJUSTING GROUND AND SALTWATER BALANCE

In the ALL METAL mode (with the toggle switch in the center position), the

detector senses any metal, ferrous ( containing iron) or nonferrous.

When you use this mode, you must set GND/salt ADJ to distinguish between

elements commonly found in the ground and metal objects, and to balance the

effects of saltwater when you search near the ocean.

NOTE: If there is metal on or under the ground where you perform this

adjustment, you cannot tell whether any tones you hear are caused by

the metal or by elements in the ground (or salt in the water).

Before you start, be sure there is no metal visible on the ground.

If you think there might be metal under the ground, move to another

spot and proceed.

1. Begin with GND/salt ADJ adjusted toward Salt (if you are searching near

saltwater) or Preset (if you are searching elsewhere), and lift the

searchcoil about waist high in the air.

2. Push the toggle switch toward TUNE and release. The switch springs back

to the middle position.

3. Lower the searchcoil to about one inch above the ground. If the

detector emits a tone, lift the searchcoil waist high in the air and

try again.

4. Turn GND/salt ADJ counterclockwise slightly, about an eighth of a

turn. Push the toggle switch toward TUNE and release again. Then lower

the searchcoil as described in Step 3. If the detector still emits a

tone, repeat this procedure.

When the detector no longer emits a tone when you lower the searchcoil

to the ground, it is properly ground balanced for that area.

IMPORTANT: To assure you achieve an optimum threshold level when adjusting

GND/salt ADJ, turn it in small increments. If you think you've

turned GND/salt ADJ too far counterclockwise, turn it clockwise

until the detector emits a tone, then turn it counterclockwise

slightly until the detector no longer emits a tone.


Cat. No. 63-3008 OWNER'S MANUAL DISCOVERY3

NOTE: Images are excluded due to the memory requirements; therefore, there will be references to illustrations that do not exist in this text only document. All illustrations can be found in the original manual published by Radio Shack. The Discovery3 is discontinued and is no longer available.

©1995 Tandy Corporation

All Rights Reserved

Radio Shack is a registered trademark used by Tandy Corporation

Please read before using this equipment.

Metal Detector

INTRODUCTION

Your Radio Shack Discovery3 Metal Detector is designed for versatility in all areas of metal detecting and treasure hunting. The Discovery3 lets you identify and locate precious metals with pinpoint accuracy. It can distinguish between different types of metals and "tune out" the ones you don't want to search for. You can use it to hunt for coins, relics, jewelry, silver or gold, just about anywhere-- even near the ocean

The Discovery3's features include:

Dual LCD Display -- displays the type of metal being detected and the depth reading at the same time.

Ultra Slow Sweep VLF Discrimination -- distinguishes between different metals efficiently, even when the detector is swung at slow speeds.

Three Tone Audio Discrimination --sounds distinctive tones for different categories of metal objects to make target identification easier.

Notch and Auto Notch -- let you distinguish between junk and valuable metal objects, and automatically reject junk targets.

OPTIONAL ACCESSORY

The best coil to use depends on where and what you will be targeting when you are in the field. If you are looking for deeply-buried objects, a medium-sized coil, such as the standard coil that came with your detector, is more efficient. If you are looking for tiny objects and coin sized objects that are not buried too deeply, a 4-inch coil might work better.

The Discovery 4-lnch Coil System (Radio Shack Cat. No. 63-3009) is highly sensitive and offers superior performance when hunting for small objects (such as gold nuggets or small pieces of jewelry), or in mineralized or highly trashed areas.

Because of its smaller size, the 4-inch coil has a narrower detection field and is less susceptible to interference from trash items. This makes it better able to isolate precious metals in trashy areas.

©1995 Tandy Corporation.

All Rights Reserved.

Radio Shack is a registered trademark used by Tandy Corporation.

TABLE OF CONTENTS

Installing the Batteries......................5

Using Headphones..............................6

Listening Safely...........................6

Traffic Safety.............................6

Basic Operation.................................7

Turning On Your Detector .....................7

Setting the Mode..............................7

Reading the Display...........................8

Sweeping .....................................8

Three Tone Audio Target Identification (ATI)..9

Adjusting Ground and Saltwater Balance .......10

Fine Tuning ....................................11

Adjusting SENSITIVITY ........................11

Adjusting DISC/NOTCH .........................11

Using DISC ................................11

Using NOTCH ...............................12

Using AUTO NOTCH ..........................12

Care and Maintenance ...........................13

ASSEMBLY

Assembling your Discovery3 Metal Detector is easy and requires no special tools. Just follow these steps:

1. Using the supplied bolt and nut with knobs, attach the searchcoil to the lower stem.

2. Press the button on the upper end of the lower stem and slide the lower stem into the upper stem.

Adjust the stem to a length that lets you maintain a comfortable upright posture, with your arm relaxed at your side and the searchcoil level to the ground and about 1/2 to 2 inches above the ground.

3. Wind the searchcoil cable around the stem. Leave enough slack in the cable to let you adjust the coil when you are hunting on uneven ground. Then tighten the knob at the end of the searchcoil.

Note: To adjust the coil, simply loosen the knob.

4. Insert the coil's plug into the matching connector on the control housing. Be sure the holes and pins line up correctly.

Cautions:

· Do not force the plug or you might damage it.

· To disconnect the cable, pull out the plug. Do not pull on the cable.

INSTALLING THE BATTERIES

Your metal detector requires two 9 volt alkaline batteries, such as Radio Shack Cat. No. 23-553.

Follow these steps to install the batteries.

1. Press the battery compartment covers in the direction of the arrows.

2. Snap one battery onto each of the terminals, and place the batteries inside the compartments.

3. Replace the compartment covers.

Caution: Only use fresh batteries of the required size and type.

Notes:

· The low battery indicator lights briefly when you turn on power, so you know the detector is working properly and the batteries are good.

· If the low battery indicator stays on continuously, replace the batteries.

· Many metal detector problems are caused by weak, dead, or improperly connected batteries. If the detector does not come on, has weak volume, will not tune properly, has erratic operation, or drifts, replace the batteries.

· You can extend battery life by using headphones.

· Remove the batteries if you do not plan to use the detector for a week or more.

RESETTING THE DETECTOR

The detector might "lock up" and sound a continuous tone if you have low battery voltage, use non-alkaline batteries, or test the detector with the searchcoil near a large metal object. If this happens:

· Check for a low battery indication

Replace the batteries if necessary.

· Move to a different testing location.

· Reset the detector by turning it off, then turning it on again.

USING HEADPHONES

Using headphones (not supplied) with your metal detector makes it easier to identify subtle changes in the threshold levels for better detection results, and also reduces drain on the batteries.

The detector has a stereo head phone jack. For the best sound, use stereo headphones (such as Cat. No. 33-1029 or 33-1125).

To connect headphones, insert the headphones' 1/4-inch plug into the headphone jack on the side of the detector's control housing.

HEADPHONE JACK

Listening Safely

To protect your hearing, follow these guidelines when you use head phones.

· Set the volume to the lowest setting before you begin listening. After you begin listening, adjust the volume to a comfortable level.

· Do not listen at extremely high volume levels. Extended high-volume listening can lead to permanent hearing loss.

· Once you set the volume, do not increase it. Over time, your ears adapt to the volume level, so a volume level that does not cause discomfort might still damage your hearing.

Traffic Safety

Do not wear headphones while operating your detector in traffic areas. This can create a traffic hazard and is illegal in some areas.

Even though some headphones are designed to let you hear some out side sounds when listening at normal volume levels, they still present a traffic hazard.

BASIC OPERATION

Now that your metal detector is assembled, it's time to learn how to use it. Please read this section thoroughly before you use your Discovery3.

TURNING ON YOUR DETECTOR

TOGGLE SWITCH

Hold the detector in a comfortable In the DISC mode, the detector must position and turn it on by rotating be in motion to accurately detect an POWER/mode to DISC, NOTCH, or item, and you can set it to reject iron AUTO NOTCH. The detector sounds and various levels of junk item. For three beeps.

SETTING THE MODE

Your Discovery3 has two operating modes: ALL METAL and DISC (discriminating).

In the ALL METAL mode, the detector sounds a tone for as long as the target is under the searchcoil. For ALL METAL tuning, push the toggle switch to TUNE, then release it to the center position.

If you set the toggle switch to DISC, use POWER/mode to select the search mode (DISC, NOTCH, or AUTO NOTCH). See "Fine Tuning" for instructions about how to use the discriminate mode.

READING THE DISPLAY Notes:

The LCD display is located at the top of the control housing. The display shows a probable identification of the object (on the target ID meter), as well as its approximate depth (on the depth meter).

The target ID meter displays various coins and metal objects, and a range from SILVER to GOLD. When the detector senses a target, it appears next to the name of a coin or metal object to show you the type of object it thinks it is detecting.

Note: When the arrow points to a coin, the detector could be sensing either a a coin or another type of met al (such as jewelry, tokens, medals, or even junk metal).

The depth meter shows about how deep the object is. The window shows numbers representing inches (from 0 to 10). Two arrows on the display point to numbers to show a range of possible depths (SHALLOW, MEDIUM, or DEEP). When the arrows point to 0 and 4, for example, this means the target is 4 inches or less below the surface.

· Sometimes only one arrow appears to indicate depth.

· The depth meter is more effective at detecting small objects than larger ones.

SWEEPING

Hold the detector in a position that is comfortable for you, as close to the ground as possible without touching the ground. Sweep from side to side in about a three-foot arc, at a pace that doesn't wear you out.

Sweep in a slightly overlapping pat tern. The search signal peaks as you pass a target's center.

Try to keep the searchcoil parallel to the ground at all times and avoid lifting the coil off the ground at the end of each swing.

When you use the detector, some false signals can occur at the end of your swing. The detector is most susceptible to "ghost" noise when the coil reverses direction. "Ghost" signals do not repeat as you swing the searchcoil over the suspected target several times; true target responses repeat.

Very large (or many closely spaced) junk targets can also cause the detector to emit "ghost" sounds. Generally these signals sound chopped and do not repeat, and you can learn to recognize them.

In the ALL METAL mode, if the response is weak, it might be a good deep target, but if it is very strong, the target is probably junk. When in doubt, DIG. If you don't dig at all, you are surely passing up some good finds!

Hints:

· Hitting the ground or rocks can cause a false signal similar to the sound of detecting a target.

· If you sweep the coil too high above the ground, you will only be able to detect targets near the surface.

· If you receive a signal and you cannot determine the target, you might have detected a combination of targets.

THREE TONE AUDIO TARGET IDENTIFICATION (ATI)

When the Discovery3 is In the discrimination (DISC) mode (with the toggle switch to the left), its Audio Target Identification (ATI) system automatically classifies metal objects into three categories, to make it easier to identify your target.

The detector sounds three different tones to distinguish between categories of detected items: a low tone for small gold and nickel; a medium tone for most old and new pull tabs and some gold; and a high tone for cop per, silver, and brass.

· In the DISC mode, the detector does not sound a tone for iron and steel. The detector must be in motion to make a detection in the DISC mode.

ADJUSTING GROUND AND SALTWATER BALANCE

In the ALL METAL mode (with the toggle switch in the center position), the detector senses any metal, ferrous (containing iron) or nonferrous.

When you use this mode, you must set GND/salt ADJ to distinguish between elements commonly found in the ground and metal objects, and to balance the effects of saltwater when you search near the ocean.

Note: If there is metal on or under the ground where you perform this adjustment, you cannot tell whether any tones you hear are caused by the metal or by elements in the ground (or salt in the water). Before you start, be sure there is no metal visible on the ground. If you think there might be metal under the ground, move to another spot and proceed.

1. Begin with GND/salt ADJ adjusted toward Salt (if you are searching near saltwater) or Preset (if you are searching elsewhere), and lift the search coil about waist high in the air.

2. Push the toggle switch toward TUNE and release. The switch springs back to the middle position.

3. Lower the searchcoil to about one inch above the ground. If the detector emits a tone, lift the searchcoil waist high in the air and try again.

4. Turn GND/salt ADJ counterclockwise slightly, about an eighth of a turn. Push the toggle switch toward TUNE and release again. Then lower the searchcoil as described in Step

3. If the detector still emits a tone, repeat this procedure.

When the detector no longer emits a tone when you lower the searchcoil to the ground, it is properly ground balanced for that area.

Important: To assure you achieve an optimum threshold level when adjusting GND/salt ADJ, turn it in small increments. If you think you've turned GND/salt ADJ too far counterclockwise, turn it clockwise until the detector emits a tone, then turn it counterclockwise slightly until the detector no longer emits a tone.

FINE TUNING

Once you become familiar with how your metal detector works, you can fine tune it to make it less sensitive to interference and more selective in what it finds. For example, you can make it tune out undesirable objects and tune in precious metals, such as having it distinguish between iron and gold.

ADJUSTING SENSITIVITY

Use SENSITIVITY to adjust the detector's sensitivity to conditions that can cause it to respond erratically. For example, broadcasting antennas and power lines can cause false signals.

Although SENSITIVITY does not affect the detector's sensitivity when the toggle switch is set to ALL METAL, the target ID and depth readings might be erratic if the sensitivity is set too high when the toggle switch is set to DISC.

Rotate SENSITIVITY clockwise to in crease, or counterclockwise to decrease the detector's sensitivity. Always set SENSITIVITY as high as possible while minimizing "ghost" signals.

ADJUSTING DISC/ NOTCH

You can set DISC/NOTCH so the detector distinguishes between junk and valuable metal objects, and only detects the types of objects that you want to search for.

Using DISC

With POWER/mode set to DISC and the toggle switch in the left (DISC) position, the control functions as a standard variable discriminator. As you rotate DISC/NOTCH clockwise from its full counterclockwise position, it rejects iron, foil, nickels, pull tabs, and screw caps (in that order).

Using NOTCH

Using AUTO NOTCH

When you set POWER/mode to NOTCH with the toggle switch in the left (DISC) position, DISC/NOTCH functions as a variable notch rejection window. Then you can adjust DISC/NOTCH to reject (or "notch out") selected types of pull tabs or other trash.

For example, many types of gold rings are rejected along with nickels, but you can eliminate some pull tabs without rejecting nickels.

Note: Some pull tabs or tab pieces cannot be distinguished from nickels and gold rings.

To set the DISC/NOTCH position, use a pull tab or other object of the type you want to reject.

1. Adjust DISC/NOTCH to FOIL.

2. Slowly turn DISC/NOTCH clockwise until the detector emits no sound.

Note: Check a nickel to be sure the Discovery3 still detects it.

With DISC/NOTCH properly adjusted, the Discovery3 detects nickels while rejecting pull tabs.

With the toggle switch in the left (DISC) position and POWER/mode set to AUTO NOTCH, the detector rejects most trash items and emits a low tone (for gold and nickel) or a high tone (for copper, silver, and brass).

Expect some targets to be junk items, even if the detector emits a tone. Besides nickel, other items that might emit a low tone include foil, some pull tabs, and small gold rings. Besides copper and silver, other items that might emit a high tone include brass and medals.

You can use DISC/NOTCH to widen the spectrum of discrimination. For example, as you turn DISC/NOTCH clockwise, the detector rejects zinc pennies.

CARE AND MAINTENANCE

Your Discovery3 Metal Detector is an example of superior design and craftsmanship. The following suggestions will help you care for your metal detector so you can enjoy it for years.

Handle the metal detector gently and carefully. Dropping it can damage circuit boards and cases and can cause the metal detector to work improperly.

Use and store the metal detector only in normal temperature environments. Temperature extremes can shorten the life of electronic devices and distort or melt plastic parts.

Wipe the metal detector with a damp cloth occasionally to keep it looking new. Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the metal detector.

The coil is waterproof and can be submerged in either fresh or saltwater. Be careful to prevent water from entering the chassis. After using the coil in salt water, rinse it with fresh water to prevent corrosion of the metal parts.

Modifying or tampering with the detector's internal components can cause a malfunction and might invalidate your detector's warranty. If your detector is not performing as it should, take it to your local Radio Shack store for assistance.

RADIO SHACK LIMITED WARRANTY

This product is warranted against defects for 1 year from date of purchase from Radio Shack company-owned stores and authorized Radio Shack franchisees and dealers. Within this period, we will repair it without charge for parts and labor. Simply bring your Radio Shack sales slip as proof of purchase date to any Radio Shack store. Warranty does not cover transportation costs. Nor does it cover a product subjected to misuse or accidental damage. EXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. Some states do not permit limitation or exclusion of implied warranties; therefore, the aforesaid limitation(s) or exclusion(s) may not apply to the purchaser. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. we Service What we Sell

RADIO SHACK

A Division of Tandy Corporation

Fort Worth, Texas 76102

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