Radioshack

These operating instructions are posted on the RadioShack web site.  They may not be exactly what you are looking for but have a look to see if they relate in any way to the metal detector you have.  Apart from being a bit more powerful and sophisticated, they all follow the same principle as the simple 3001

 The steps in this section explain each control on the control housing and handle, and how to use your metal detector. 

Take a moment to become familiar with the position and use of the controls before using the metal detector.

 THE VIEWMETER 

The view meter is located at the top of the control housing and measures battery power, determines the quality of hidden metal, and helps you tune the detector.

 Turning On the Detector 

Hold the detector in a position comfortable for you, then turn it on by rotating VOLUME two-thirds clockwise.  Set TEST to NOR to detect.

Adjusting the Controls in the Field

The tuning skills you will learn while preparing the detector will be put to good use during your actual search.  You will know how each control works so you can fine-tune the detector quickly.

 If you wish to test the accuracy of your tuning at your current location in the field, take a few samples of different kinds of metal with you.

Note that some metals, when left exposed to the elements, become corroded; so, it is always wise to carry along a piece of corroded metal. 

TUNING THE DETECTOR

 Setting TUNE

 The Radio Shack VLF Discriminator Metal Detector distinguishes between ferrous and non-ferrous metals.  When the detector senses a metallic object, one of two reactions occurs - the sound and meter reading increase or decrease.  The result depends upon the type of metallic material, ferrous or non-ferrous.  Ferrous metals contain iron.  Gold silver, copper, platinum, aluminum, lead, zinc, etc. are examples of non-ferrous metals. 

TUNE fine-tunes the balance between the detector's receiver and transmitter circuitry.

 Follow these steps to set TUNE.

 1.  Rotate VOLUME two-thirds clockwise.

 2.  Set MODE to VLF.

 3.  Set TEST to NOR. 

4.  Set the remaining controls to mid-range.

5.  Hold the search coil up in the air, press and hold down Auto-Tune, and slowly turn TUNE.  The pointer swings back and forth and the detector sounds a tone.  Turn TUNE until the pointer rests at or near the center.  Release Auto-Tune.

 Note:  Press Auto-Tune during operation to automatically return the pointer to the center.

 Setting MODE

 Set MODE to VLF when you use GROUND (See "Setting GROUND).  Set MODE to TR1 or TR2 when you use DISCRIMINATOR (See "Setting DISCRIMINATOR)".

Using GROUND helps tune out false signals from mineralized soil.

DISCRIMINATOR distinguishes between NON-FERROUS and FERROUS objects.

 Setting SENSITIVITY

 To adjust the search coil's ability to detect objects at different depths in the soil, rotate SENSITIVITY from MIN to MAX.  For maximum performance, set SENSITIVITY as high as possible.  If the detector makes a "Chattering noise, decrease SENSITIVITY until the "Chatter" stops.

 Setting GROUND 

GROUND tunes out false signals from mineralized soil.

 Follow these steps to set GROUND.

 1.  Set MODE to VLF and lower the search coil to 1/2- to 2 - inches above  the ground.

2.  If the pointer swings to the left, turn GROUND to the right.

 3.  Raise the search coil and press Auto-Tune.  The pointer returns to the center.

 4.  Repeat Steps 1-3 until there is a very small variation in the meter reading each time you lower the search coil to the ground.

 Notes: 

Setting GROUND takes a little time, but is critical for accurate  operation.

 fter you set GROUND, do not reset it until you use the detector at a different site.

Setting DISCRIMINATOR 

DISCRIMINATOR determines whether the hidden metal is NON-FERROUS or FERROUS.

Before you set DISCRIMINATOR, you must set MODE.  Set MODE to TR1 to detect extreme differences in metals, such as between iron and gold.  Set MODE to TR2 to detect even greater distinction between metals.

Set DISCRIMINATOR to mid-range.  While you detect, adjust DISCRIMINATOR to the best position.  The difference between iron and gold shows on the meter (iron in the ferrous section, gold in the non-ferrous section).  As you set DISCRIMINATOR higher, the detector becomes more sensitive to the differences between aluminum and gold, but some small pieces of valuable jewelry, such as small rings, may be over-looked.  Therefore, coin collectors do not usually set DISCRIMINATOR higher.

Also, it first rejects small pieces of silver paper, then thick foil, and finally metal objects like pull tabs from aluminum cans.

 Notes:

 Each time you use the detector, you must adjust DISCRIMINATOR.  Each expedition presents new challenges.

Press Auto-Tune during operation to automatically return the pointer to the center.

Fine-Tuning the Controls

Set these controls:

  1.  TEST to NOR

  2.  MODE to VLF

Set the remaining controls to mid range.

When you detect metal, switch MODE between TR1 and TR2 to determine the quality of metal.  Adjust all remaining controls to their desired positions.  (See "Tuning the Detector.")

SWEEPING HINTS

Keep the search coil in a consultant parallel position to the ground throughout the sweep.  Move the search coil slowly from side to side, covering about a 3-foot area, overlapping each sweep.  The threshold tone should peak as you pass the target center.  (Hurrying will cause you to miss targets.)

 Note:  The search coil will not detect without motion.  Be careful not to swing the search coil upward at the end of each sweep.  The swing up can cause the detector to emit false signals.  Keep the search coil parallel to the ground at all times but don't touch the ground.  Hitting the ground may cause a false signal.

DETECTION HINTS 

No detector is 100 percent accurate.  Various conditions and objects may adversely influence metal detection.  Its reaction depends on a number of things:

  The angle at which the object rests in the ground

  The depth of the object 

  The amount of iron in the object

  The size of the object

 To pinpoint an object, the second time, go at right angles to the first time, making an "X" pattern.

 Note:  The target will be directly below the "X" at the point of the loudest response.  This allows you to detect some targets that were hidden the first time due to the sweep direction.   If trash in an area is so heavy that you get false signals, slow your sweep speed and use shorter sweeps.

 Notes:

A good detection has a consistent rise and drop of threshold tone.

A poor detection has irregular highs and lows in threshold tones.

 If the metal is in the shape of a circle, opposite reactions may occur.

 A good target response repeats as you swing the search coil over the suspected target.  Trash-induced signals tend to not repeat.  Recently buried coins might not respond the same as coins buried  for a long period of time.  Some nails, nuts, bolts, and other iron objects (such as old bottle caps) oxidize and create a halo effect around these objects.

 A halo effect is caused by a mixture of natural elements in the ground and the oxidization created by different metals.  Because of the metal mixtures, target signals may not be in a "fixed" position.  This effect makes these objects very hard to reject.  (See "Fine Tuning the Controls.")

TONE VARIATIONS

 The threshold tone may vary slightly while you search due to soil changes.  This does not usually affect the sensitivity of the unit and should not require further adjustment.

 If the threshold tone changes significantly, you might need to readjust GROUND.  Sometimes the change in threshold tone is due to reasons other than ground conditions and can be easily corrected by a simple procedure.

Raise the search coil one foot from the ground and push Auto-Tune. Lower the search coil to the ground again.  If this does not correct the problem, repeat the full procedure to set GROUND.  (See "Setting GROUND.")  If you continue to have problems, contact your local Radio Shack store for assistance.

 (BR/smc-05/09/94)  

 630 3004

Detector Adjustment--Ground Setting: 

1.  Hold waist high and set Ground all the way up.

2.  Set Sensitivity half way up.

3.  Push Tune for Threshold tone. If not heard, then turn up Sensitivity.

4.  Drop coil to half waist high.

5.  Adjust Ground until tone does not change. 

Your RadioShack Metal Detector distinguishes between ferrous and non ferrous metals.  Ferrous metals contain iron, while non-ferrous metals such as gold, silver, copper, platinum, aluminum, lead, and zinc do not.

When the detector senses a metallic object, the meter reading changes and the detector might sound a tone.  The actual reaction depends on what metal is detected.

Preparing the Detector

Turning On the Detector

Hold the detector in a comfortable position, then rotate VOLUME away from OFF to the desired sound level.  Set OPERATE/BATT TEST to OPERATE to detect.

Tuning the Detector

TUNE fine-tunes the balance between the detector's receiver and transmitter circuitry to provide consistent pointer and tone indications.

Follow these steps to set TUNE.

1.  Rotate VOLUME to the 11 o'clock position.

2.  Set DISCRIMINATION to its midpoint.

3.  Hold the search coil about 1 foot away from the ground and any metal object, hold down the red button on the handle, and slowly rotate TUNE  left and right until the pointer on the view meter rests at or near 0, then release the red button. 

As you search, you can fine-tune the detector using DISCRIMINATION (see "Fine-Tuning the Detector" below).

Note:  Press the red button on the handle at any time during operation to automatically return the pointer to 0.

Testing and Using the Detector 

To learn how the detector reacts to different metals, you should test it before you use it the first time.  You can test the detector indoors or outdoors. 

Indoor Testing 

1.  Remove any watches, rings, or other metal jewelry you are wearing, then place the detector on a wooden or plastic table.

2.  Adjust the search coil's angle so the flat part faces the ceiling.

Note:  Never test the detector on a floor inside a building.  Most buildings have metal of some kind in the floor, which might  interfere with the objects you are testing or mask the signal  completely.

3.  Rotate VOLUME to the 11 o'clock position.

4.  Set DISCRIMINATION to its mid-point.

5.  Move a sample of the materiel you want the detector to find (such as a  gold ring or a coin) about 2 inches above the search coil.

Notes:  The search coil will not detect without motion.  You must move the  object since you are not sweeping with the detector at this time.

If you are using a coin, the detector detects it more easily if  you hold it so a flat side is parallel with the flat side of the search coil (not the edge).

If the detector detects the material, it sounds a tone and the pointer moves to the left (ferrous) or to the right (non-ferrous) while the detector determines the type of metal it is detecting. 

If the detector does not detect the material, check the battery power and verify that the search coil is properly connected.  Also, you might need to fine-tune the detector (see "Fine Tuning the Detector" below).

Outdoor Testing and Use

1.  Find an area on the ground outside where there is no metal.

2.  Place a sample of the material you want the detector to find (such as a gold ring or a coin) on the ground.  (If you are using valuable metal such as gold to test the detector, mark the area where you placed the item, to help you find it later.  Do not place it in tall  grass or weeds.) 

3.  Rotate VOLUME about two-thirds clockwise.

4.  Press and release the red button on the handle.  Slowly rotate TUNE  until the pointer is at or near 0.  You should barely hear a tone.

5.  While holding the search coil level and about 1-2 inches above the ground, slowly move the search coil over the area where you placed the sample, sweeping the search coil in a side-to-side motion. 

Search Coil Sweeping Hints:

 Never sweep the search coil as if it were a pendulum.  Raising the search coil while sweeping or at the end of a sweep causes false readings.

  Sweep slowly - hurrying makes you miss targets. 

If the detector detects the material, it sounds a tone and the pointer moves to the type of metal it found.

If the detector does not detect the material, make sure you are moving the search coil correctly. 

Notes:  The detector responds with a strong signal when it detects most  valuable metal objects.  If a signal does not repeat after you  sweep the search coil over the target a few times, the target is probably junk metal.

 False signals can be caused by trashy ground, electrical       interference, or large irregular pieces of junk metal.  False signals are usually broken or non-repeatable. 

6.  Try finding other metal in the area.  When you find a metal item, wait  a few seconds after the tone stops before continuing, to allow the detector time to reset (or press the red button on the handle to return the pointer to the center of the view meter). 

Fine Tuning the Detector 

After you become familiar with how your detector works, you can fine-tune it to make it more selective in what it finds.

Discrimination is the detector's ability to differentiate between types of metal.  The detector's DISCRIMINATION setting determines whether the detector will distinguish between different types of ferrous and non ferrous metals.

You can set DISCRIMINATION to minimum (fully counterclockwise), to maximum (fully clockwise), or anywhere in between.  As you set DISCRIMINATION to higher levels, the detector first does not detect small pieces of silver paper, then thick foil, and finally metal objects like pull tabs from aluminum cans.

Note:  Each time you use the detector in a different area, you must adjust  DISCRIMINATION.  Each search location presents new challenges.

False Signals 

Because your detector is extremely sensitive, trash-induced signals and other sources of interference, might cause signals that seem confusing.  The key to handling these types of signals is to dig for only those targets that generate a strong, repeatable signal.  As you sweep the search coil back and forth over the ground, learn to recognize the difference between signals that occur at random and signals that are stable and repeatable.

 To reduce false signals when searching very trashy ground, scan only a small area at a time using slow, short overlapping sweeps.

Detection Hints

No detector is 100 percent accurate.  Various conditions influence metal detection.  The detector's reaction depends on a number of things:

 The angle at which the object rests in the ground. 

 The depth of the object.

 The amount of iron in the object.

 The size of the object.

 Pinpointing a Target

Accurately pinpointing a target makes digging it up easier.

 Accurate pinpointing takes practice, and we suggest you practice finding and digging up small metal objects on your own property before you search other locations. 

Sometimes, targets are difficult to accurately locate due to the sweep direction.  Try changing your sweep direction to pinpoint a target. 

Follow these steps to pinpoint a target.

1.  When the detector detects a buried target, continue sweeping the search coil over the target in a narrowing side-to-side motion.

Make a visual note of the exact spot on the ground where the detector  beeps. 

2.  Stop the search coil directly over this spot on the ground.  Then move  the search coil straight forward away from you and straight back  toward you a couple of times.  Make a visual note of the exact spot on the ground where the detector   beeps. 

3.  Repeat Steps 1 - 2 at a right angle to the original search line,   making an "X" pattern.  The target should be directly below the "X" at  the point of the loudest response.

Notes:  If trash in an area is so heavy that you get false signals, slow  your sweep speed and use shorter sweeps. 

Recently buried coins might not respond the same as coins buried  for a long period of time because of oxidation.    Some nails, nuts, bolts, and other iron objects (such as old  bottle caps) oxidize and create a "halo" effect.  A "halo" effect      is caused by a mixture of natural elements in the ground and the  oxidation created by different metals.  Because of the metal  mixtures, target signals might not be in a "fixed" position.  This effect makes these objects very hard to detect accurately.  (See "Fine-Tuning the Detector" above.)

630 3006

Using Headphones 

You can connect a pair of stereo headphones (not supplied) to the detector so you can listen to it privately.  Using headphones also saves battery power and makes it easier to identify subtle changes in the sounds you hear for better detection results.  Your local Radio Shack store has a wide selection of headphones.

To connect headphones to the detector, insert the headphones' 1/8-inch plug into the HEADPHONE jack on the side of the control housing. 

The detector's internal speaker disconnects when you connect headphones. 

Listening Safely 

To protect your hearing following 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 near high-traffic areas.  Even though some headphones are designed to let you hear some outside sounds when listening at normal volume levels, they still can present a traffic hazard.

Operation 

Your Radio Shack Discriminator Metal Detector distinguishes between ferrous and non-ferrous metals.  Ferrous metals contain iron, while non-ferrous metals such as gold, silver, copper, platinum, aluminum, lead, and zinc do not.

 When the detector senses a metallic object, the meter reading changes, the NON-FERROUS or FERROUS indicator turns on or off, and the detector sounds one of three tones.  The actual reaction depends on what metal is detected.  The higher the tone pitch, the stronger the detection. 

Preparing The Detector 

Turning On the Detector 

1.  Set BATT TEST to OPERATE. 

2.  Hold the detector in a comfortable position, then rotate MODE to the desired position.  Set it to VLF to test battery power and adjust TUNE and GROUND.  (See "Tuning the Detector" above, and "Adjusting GROUND"  

Set it to TR1 to detect extreme differences in metals, such as between iron and gold.  The difference between iron and gold shows on the meter (iron in the ferrous section, gold in the non-ferrous section).

Set it to TR2 to detect finer distinctions between metals, for example between aluminum and gold (see "Adjusting DISCRIMINATION"  

Tuning the Detector 

TUNE fine-tunes the balance between the detector's receiver and transmitter circuitry to provide consistent pointer and tone indications. 

Follow these steps to set TUNE.

1.  Rotate VOLUME to the 10 o'clock position.

 2.  Set MODE to VLF.

 3.  Set GROUND, DISCRIMINATION, and SENSITIVITY to mid-range.

 4.  Hold the search coil at least 1 foot away from the ground and any metal object, hold down the red button on the handle and slowly rotate TUNE until the view meter pointer rests at or near 0. 

As you search, you can fine-tune the detector using the other controls (see "Fine-Tuning the Detector"

NOTE:  Press the red button on the handle at any time during operation to automatically return the pointer to the center of the view meter.

Testing and Using The Detector

To learn how the detector reacts to different metals, you should test it before you use it the first time.  You can test the detector indoors or outdoors. 

Indoor Testing

1.  Remove any watches, rings, or other metal jewelry you are wearing, then  place the detector on a wooden or plastic table. 

2.  Adjust the search coil's angle so the flat part faces the ceiling. 

 NOTE:  Never test the detector on a floor inside a building.  Most  buildings have metal of some kind in the floor, which might  interfere with the objects you are testing or mask the signal completely.

3.  Set MODE to TR1.

4.  Move a sample of the material you want the detector to find (such as a gold ring or a coin) about 2 inches above the search coil.

NOTES:  The search coil will not detect without motion.  You must move  the object since you are not sweeping with the detector at this time.    If you are using a coin, the detector detects it more easily if  you hold it so a flat side (not the edge) is parallel with the  flat side of the search coil. 

If the detector detects the material the NON-FERROUS and FERROUS indicators flash and the pointer moves to FERROUS or NON-FERROUS while the detector determines the type of metal it is detecting.  If it detects non-ferrous metal, it also sounds a tone. 

If the detector does not detect the material, check the battery power and verify that the search coil is properly connected.  Also, you might need to fine-tune the detector (see "Fine-Tuning the Detector"  

Outdoor Testing and Use

 1.  Find an area on the ground outside where there is no metal.

 2.  Place a sample of the material you want the detector to find (such as a  gold ring or a coin) on the ground.  (If you are using valuable metal will pick up all nickels and gold rings along with pull tabs and copper/silver coins, but still reject iron. 

3.  Auto Notch:  This mode will automatically reject iron and most pull tabs  yet retain detection of nickels and most small gold rings.  The  DISC/NOTCH control will increase the width of the NOTCH as it is turned  towards HIGH, making possible the rejection of screw caps and zinc  pennies, yet still detecting Nickels and many gold rings.

 NOTE:  Some gold rings will not be detected in this mode of operation.  A percentage of pull-tabs will still be detected especially  pull-tabs that are broken in half in the shape of a "beaver tail". 

READING THE DISPLAY 

The LCD displays are located at the center of the control housing.  The displays show a probable identification of the object (on the target ID readout), as well as the mode of operation being used (on the target mode readout). 

The LCD target display will give a visual readout of the probable type of metal being targeted and what denomination of coins are detected.  The LCD target display will usually lock on when a target is being detected and not lock on when the unit "falses" or an object is borderline discriminated.

The target ID readout displays various coins and metal objects, and a range from GOLD to SILVER.  When the detector senses a target, an arrow will indicate the probable target being detected. 

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

GOLD/SILVER range:  Indicated on the top of the readout.  The gold spectrum is to the left of the meter and the silver spectrum is to the right.  Other types of metal fall under both spectrums such as iron, foil, and nickel under the gold spectrum and copper pennies under the silver spectrum.

1 CENT ZINC:  Indicates that the target probably is a zinc penny.  Will usually emit a medium tone when targeted.  Other targets, such as large gold, will also fall into this category.

SCREW CAPS:  Indicates that the target probably is a Screw Cap or other types of metal such as bottle caps.  Medium size gold will also fall into this range, as well as large aluminum items.

PULL TAB:  Indicates that the target is probably a pull-tab.  Some small gold will also read as pull-tab. 

IRON/FOIL:  Indicates that the target is probably iron or foil.  Some rusted oxidized iron will occasionally register in the silver range.

NOTE:  All of the target indications are used as symbols and a visual  reference of what is being targeted.  Many other types of metal  can fall under any one of these indications.  There is always a  trash to treasure ratio when detecting; the LCD allows a visual reference to minimize the trash only - it will not completely eliminate all trash items.

LOW BAT INDICATOR:  Will blink when turning the unit on to indicate that it is working.  If the indicator comes on and stays on, the batteries need replacement.

TARGET MODE:  Each arrow will lock on and stay on whatever choice of mode the user has selected.  Each mode of operation can be set by choosing one of the three Touchpads on the control panel after the unit is turned on.

THREE TONE AUDIO TARGET IDENTIFICATION (ATI) 

When the Discovery 2000 is in the DISC or NOTCH modes, its Audio Target Identification (ATI) system automatically classifies metal objects into three categories, to make it easier to identify the type of target being detected. 

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. 

IRON & STEEL:  In the DISC or NOTCH modes, most iron and steel objects usually will not be detected.  On occasion, if the iron is highly oxidized, a tone may be emitted.  For instance, some rusted bottle caps will emit a high tone and indicate on the LCD readout in the SILVER range. 

GOLD & NICKEL:  All nickels and many gold items will emit a low tone. There is a percentage of gold rings, around 15%, that emit a medium tone, but the LCD will still read under the gold spectrum. 

OLD & NEW PULL TABS:  These will usually emit a medium tone or no tone at all if in the Notch mode.  If a pull-tab is broken in half, the "Beaver Tail" part will emit a low tone.  There are also pull-tabs that are bent and folded or highly oxidized that may emit a low tone. 

COPPER, SILVER & BRASS:  These metals usually will all emit a high tone in the DISC or NOTCH modes.

 NOTE:  When operating in the ALL METAL mode, Three Tone Audio Target Identification shuts down and only one medium tone is emitted for all types of targets. 

TESTING YOUR DETECTOR

1.  While testing the unit for it capability to pick up coins and other objects, always test away from other metals - a good start is outside  on the ground.  You cannot test a unit indoors on the floor, because  there is usually other metal in the floor that may conflict with the detector's signal or even mask the signal completely.

2.  If you're not picking up coins or metal, even though your coil is close  to the objects to be detected, there is a chance that you are not  maneuvering the coil properly.  Do not move the coil too quickly and  try not to sweep the coil less than an inch away from the object. 

3.  No matter what mode of operation you've chosen (ALL METAL, DISC, or  NOTCH),  your coil needs to be in movement before the unit will  recognize a target.  If you're air testing, you need to point the coil  to the ceiling and make sure there is no metal near the coil  whatsoever.  The object your testing with needs to be swung in a  side-to-side motion before the detector will be able to recognize it.

 4.  Not all gold rings will give you a low tone.  Some gold rings fall in  the pull-tab range and may emit a medium tone similar to the pull tab. Some pull-tabs, especially if they are broken in half, will give you a  low tone similar to most gold rings and nickels. 

5.  Zinc pennies will emit a medium tone instead of a high tone as do copper pennies, quarters, and dimes.

6.  Do not swing the coil, or the test object, too quickly or it may give  you a false signal.  When repetitively passing the coil over the object, allow a few seconds to pass to give the detector a chance to  recover from its last reading.

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 eliminate most pull-tabs while detecting silver/copper coins.

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.

Be careful to not operate the SENSITIVITY so high that the Target Readout becomes so erratic and false tones start emitting.  Rotate SENSITIVITY clockwise to increase, or counterclockwise to decrease the detector's sensitivity.  To determine how high to adjust the SENSITIVITY, turn the SENSITIVITY clockwise while listening for false signals; if the unit starts to chatter, emitting false signals, reduce the SENSITIVITY slightly until the chatter stops.  For maximum depth of detection, always set SENSITIVITY as high as possible.

ADJUSTING DISC/NOTCH

Only applies when unit is not operating in the ALL METAL mode.  The DISC/NOTCH control adjusts for different levels of discrimination.  When operating in the DISC mode, the level of discrimination is increased by turning the control clockwise from the LOW position.  NOTE:  Gold items will also be eliminated as the control is turned clockwise.  When operating in the AUTO NOTCH mode, the DISC/NOTCH control turned clockwise from LOW will eliminate items that fall in the range of screw caps and zinc pennies, in addition to most pull-tabs, yet retain nickels and most small gold items.

ALL METAL MODE

When first turning the unit on, the detector presets to the ALL METAL mode.

The DISC/NOTCH control will not affect operation in this mode.  By pressing the ALL METAL touchpad, the unit will return to ALL METAL from any other mode.  The detector will still require motion to detect a target in this mode of operation.

DISC MODE

To change operation mode to DISC, simply press the touchpad labeled DISC.  The mode indicator (arrow) should now have an arrow pointing down to the DISC position.  The DISC/NOTCH control knob now functions as a standard variable discriminator.  As you rotate the DISC/NOTCH clockwise from the LOW position, it rejects iron, foil, nickels (many gold items), pull-tabs, and screw caps (in that order).

AUTO NOTCH MODE

The purpose of the AUTO NOTCH is to provide automatic discrimination of most trash items without the loss of nickels and most small gold objects.  By pressing the AUTO NOTCH touchpad, the mode indicator (arrow) will point down to the AUTO NOTCH position.  In this mode, the detector emits a low tone (for most small gold and nickels) and a high tone for copper, silver, and brass.

 The DISC/NOTCH control now expands the discrimination level; for instance, zinc pennies and screw caps can also be eliminated by turning the control clockwise - yet, nickels and small gold will be retained.

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

IN THE FIELD TECHNIQUES

PINPOINTING 

Accurate pinpointing takes practice and is best accomplished by "X-ing" the suspected target area.

 1.  Once a buried target is indicated by a good tone response continue  sweeping the coil over the target in a narrowing side-to-side pattern.

 2.  Take visual note of the place on the ground where the "beep" happens as  the coil is slowly moved side-to-side. 

3.  Stop the coil directly over this spot on the ground. 

4.  Now move the coil straight forward and straight back towards you a couple of times.

5.  Again make visual note of the spot on the ground at which the "beep" occurs.

 6.  If needed "X" the target at different angles to "zero in" on the exact spot on the ground at which the "beep" happens. 

COIL MOVEMENT 

When swinging the coil, be careful to keep it level with the ground about one to two inches from the surface.  Never swing the coil as if it was a pendulum.

After selecting your choice of mode for operation, swing the searchcoil gently side-to-side, slightly overlapping each sweep as you move forward.

Make sure you keep your searchcoil approximately 1" above ground as you search.  Raising it in the sweep or at the ends of your sweep will cause false readings.  Move slowly, hurrying will only cause you to miss targets.

Most good objects will respond with a good repeatable signal.  If a signal does not repeat after swinging the coil directly over the suspected target a few times, it is more than likely trash metal.  When in the DISC mode, iron and steel objects generally do not respond.  False signals can be caused by trashy ground, electrical interference, or by large irregular trash objects.  These signals are easily recognized by their often broken or non repeatable nature.

 The Discovery 2000 is a very sensitive and deep-seeking detector.  It will loudly respond to many targets that other detectors would only emit a weak signal for.  Because of this, trash-induced signals and other sources of interference may emit signals that seem confusing.  The main key to handling these types of false signaling is to dig only those targets that emit a strong repeatable signal.  As you sweep the searchcoil back and forth over the ground, learn to recognize the difference between the signals that occur at random and signals that are stable and repeatable. 

When searching very trashy ground, it is best to scan small areas with slow, short overlapping sweeps.  To prevent erratic signals and difficult pinpointing in trashy areas, consider purchasing the Discovery 4-Inch Coil

 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. 

Discovery 3000 Metal Detector (630-3012)          Operation                 

Turning ON the Detector

1.  Hold the detector in a comfortable position.

2.  Turn on the detector by turning POWER/VOLUME clockwise until it clicks.    The detector beeps 3 times, arrows point to all options on both displays, and the LOW BAT indicator lights for a few seconds.  Then an arrow points to ALL METAL on the bottom display.

Note:  Many detector problems are caused by weak, dead, or improperly  connected batteries.  If the detector does not turn on, has
weak volume, will not tune properly, operates erratically, or
drifts, check both batteries.

3.  Turn POWER/VOLUME to adjust the sound to a comfortable listening level.

Setting a Target mode

Your detector has four built-in target modes which determine what types of metal your detector will search for and reject.

    ALL METAL
    DISC (discrimination)
    NOTCH
    AUTO (automatic) NOTCH

When the detector is set to a target mode, the top display is blank until 
the detector detects a specific type of metal.  Then the arrow points to 
that metal size and type.

All Metal

When the detector is set to ALL METAL, it sounds a tone and displays an indicator when it detects any type of metal as long as the metal is under the searchcoil.

The detector automatically sets itself to this target mode when you first 
turn it on.

The detector is set to maximum sensitivity in the ALL METAL target mode when you press ALL METAL.  Adjusting DISC/NOTCH (see "Adjusting DISC/NOTCH", below) has no effect in this mode.

To set the detector to the ALL METAL target mode from another mode, press ALL METAL on the front panel.  An arrow on the bottom display points to ALL METAL.

Disc

When the detector is set to DISC, it sounds a tone an displays an 
indicator when it detects many types of metal, and ignores the general 
metal type that you specify by adjusting DISC/NOTCH (see "Adjusting 
DISC/NOTCH", below).

Notes:  This target mode lets you set the detector to ignore a wide
category of metal types.  If you want to set the detector so it
ignores only a specific type of metal, see "Notch" or "Auto Notch"
below.   The detector does not detect iron in this target mode.

To set the detector to the DISC target mode, press DISC.  An arrow on the bottom display points to DISC.

Then adjust DISC/NOTCH to select the type of metal you want to detector to ignore (see "Adjusting DISC/NOTCH" below.)

As you turn DISC/NOTCH from left to right, the detector will ignore the metals and/or items shown on the dial.  In addition to the metals listed on the dial, the following will be ignored at the points indicated:

 DIAL AREA WHERE   IGNORE WILL OCCUR
 IGNORED ITEM  STARTING AT LOW (approx.)

Small Gold Items IRON/FOIL/NICKELS   First 1/3 of dial
Medium Gold Items PULL TABS   From 75 to 105 degrees of dial
Larger Gold Items SCREW CAPS/ZINC 1 CENT   From 105 to 135 degrees of dial

NOTCH

Use this target mode to notch (set a narrow range for) the detector's 
search range so it does not detect specific kinds of items such as 
aluminum and pull tabs, while still detecting items such as gold or 
silver.

When the detector is set to NOTCH, it sounds a tone and displays an 
indicator only when it detects the type of metal you specify and it 
ignores the types of metal you specify by adjusting DISC/NOTCH (See "Adjusting DISC/NOTCH", below.)

Notes:  This target mode lets you manually set the detector to ignore only  a specific type of metal.  If you want to set the detector so it
automatically ignores specific types of metal, see "Auto Notch". The detector does not detect iron and most small foil pieces in this target mode.

Follow these steps to set the detector to the NOTCH target mode.

1.  Press NOTCH on the front panel of the detector.  An arrow on the
 bottom display points to NOTCH.

2.  Find a sample of the material you want the detector to ignore (such as a pull tab), place the item under the searchcoil, then adjust DISC/
NOTCH until it does not detect the material.

3.  Find a sample of the material you want the detector to find (such as a nickel or gold ring), place the item under the searchcoil, then make
sure the detector detects the material.  If the detector does not
detect the material, repeat Step 2, as necessary, to adjust the notch.

Note:  Some junk metal, such as pull tabs and pieces of pull tabs,
have nearly the same characteristics as nickels and some gold rings.  If this happens, you might not be able to narrow the  detector's notch closely enough to prevent the detector from  detecting the pull tabs.

Auto Notch

When the detector is set to AUTO NOTCH, it sounds a low tone and displays an indicator when it detects nickels and small gold objects, and automatically ignores most junk metal items.  It sounds a high tone when it detects metals such as cooper, silver, and brass.

You can widen or narrow the range of metal types that the detector will detect by adjusting DISC/NOTCH on the front of the detector (see "Adjusting DISC/NOTCH", below).

Follow these steps to set the detector to the AUTO NOTCH target mode.

1.  Press AUTO NOTCH.  An arrow on the bottom display points to AUTO NOTCH.

2.  Adjust DISC/NOTCH on the front of the detector to widen or narrow the  range of metal types that the detector will detect.

Testing and Using the Detector

To learn how the detector reacts to different metals, you should test it 
before you use it the first time.  You can test the detector indoors and 
outdoors.

Indoor Testing

1.  Turn on the detector.

2.  Set the target mode.

3.  Place the detector on a wooden or plastic table, then remove any
    watches, rings, or metal jewelry you are wearing.

4.  Adjust the searchcoil so the flat part points toward the ceiling.

Note:  Never test the detector on a floor inside a building.  Most
buildings have metal of some kind in the floor, which might
interfere with the objects you are testing or mask the signal
completely.

5.  Move a sample of the material you want the detector to find (such as a  gold ring or a coin) near the searchcoil.

If the detector detects the material, it sounds a tone and an arrow
appears on the top display next to the type of metal it found.

If the detector does not detect the material, make sure the target
mode is set correctly for the type of metal you are searching for (see
"Setting a Target Mode", above), then repeat Step 5.

Notes:  If you are using a coin, the detector will detect it more
easily if you hold it so a flat side is parallel with the flat
side of the searchcoil (not the edge).

If the detector is currently set to the ALL METAL target mode,
you do not need to move the item.  Simply hold it close to the
searchcoil.

Outdoor Testing and Use

1.  Turn on the detector.

2.  Set the target mode.

3.  Find an area on the ground outside where there is no metal.

4.  Find a sample of the material you want the detector to find (such as a gold ring or a coin) and place it on the ground.  (If you are using
valuable metal such as gold to test the detector.  Mark the area where
you  placed the item, to help you fine it later.  Do not place it in
tall grass or weeds).

5.  While holding the searchcoil level  to the ground about 1-2 inches above the surface, slowly move the searchcoil over the area where you
placed the sample, sweeping the searchcoil in a side-to-side motion.

Searchcoil Sweeping Hints:

Never sweep the searchcoil as if it were a pendulum.  Raising the
searchcoil while sweeping or at the end of a sweep will cause false
readings.

If the detector is currently set to the ALL METAL target mode, you
do not need to sweep the searchcoil to detect the material.

Sweep slowly - hurrying will cause you to miss targets.

If the detector detects the item, it sounds a tone and an arrow
appears on the top display next to the type of metal it found.

If the detector does not detect the material, make sure the target
mode is set correctly for the type of metal you are searching for (see
"Setting a Target Mode", above), then repeat Step 5.  Also, make sure
you are moving the searchcoil correctly.

Notes:  The detector responds with a strong signal when it detects
most valuable metal objects.  If a signal does not repeat
after you sweep the searchcoil over the target a few times,
the target is probably junk metal.

False signals can be caused by trashy ground, electrical
interference, or large irregular pieces of junk metal.  False
signals are usually broken or non-repeatable.

6.  If the detector is set to the ALL METAL target mode, press GROUND TRAC on the front of the detector as you search, to adjust the detector to the mineral content of the ground you are searching (see "Using GROUND  TRAC", below).

7.  Try finding other metal in the area.  When you find a metal item, wait a few seconds after the tone stops before continuing, to allow the
detector time to reset.

False Signals

Your detector is extremely sensitive, and will find even deeply-buried 
metal.  Because of this, trash-induced signals and other sources of 
interference might cause signals that seem confusing.  The key to handling these types of signals is to dig for only those targets that emit a strong, repeatable signal.  As you sweep the searchcoil back and forth over the ground, learn to recognize the difference between signals that occur at random and signals that are stable and repeatable.

To reduce false signals when searching very trashy ground, scan only a 
small area at a time using slow, short overlapping sweeps.  To help 
prevent erratic signals and pinpoint targets in trashy areas, try a 
smaller searchcoil.

Fine-Tuning the Detector

After you become familiar with how your 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 set it so it ignores junk metal such as pull tabs but still registers silver and cooper coins.

Adjusting Sensitivity

Broadcast antennas and power lines can cause the detector to indicate 
false signals and operate erratically.  Adjust SENSITIVITY on the front of the detector to help reduce or eliminate these false signals.

To adjust the sensitivity, turn SENSITIVITY clockwise to increase it, or counterclockwise to reduce it.

Notes:  For maximum detection depth, always leave SENSITIVITY set as high as possible while using the detector.

If you set the detector's sensitivity too high, the top display
might randomly display arrows and the detector might sound false
tones.

Using GROUND TRAC

The detector has a GROUND TRAC circuit that adjusts to the mineral content of the ground you are searching.  Since the mineral content of ground changes from place to place, frequently press GROUND TRAC on the front of the detector as you search.

Adjusting DISC/NOTCH

Discrimination is the detector's ability to differentiate between types of 
metal and either find or ignore them.  DISC/NOTCH adjusts the detector's discrimination.

If the detector is set to the DISC, NOTCH, or AUTO NOTCH target mode, adjust DISC/NOTCH clockwise toward HIGH to set the detector to ignore items such as bottle caps, zinc pennies, and pull tabs, while still detecting items such as nickels and small gold items.

Notes:  The detector automatically sets itself to maximum sensitivity in
the ALL METAL target mode.  Adjusting DISC/NOTCH has no effect in  this mode.

If you set the detector's discrimination too high, the detector
will not detect some gold items.

Pinpointing a Target

Accurately pinpointing a target while detecting makes digging it up 
easier.

Accurately pinpointing small metal objects takes practice.  We suggest 
that you practice finding and digging up small metal objects on your own property before you search other locations.

Follow these steps to pinpoint a target.

1.  When the detector detects a buried target, continue sweeping the
searchcoil over the target in a narrowing side-to-side motion.

2.  Make a visual note of the exact spot on the ground where the detector  beeps.

3.  Stop the searchcoil directly over this spot on the ground.  Then move the searchcoil straight forward away from you and straight back toward you couple of times.

4.  Make a visual note of the exact spot on the ground where the detector beeps.

5.  If necessary, repeat Steps 1-4 to zero in on the exact spot on the
 ground where the detector beeps.

(EB 3/5/99)