Craftsman Discovery 3300 Users Manual FrstTX/DISC3300.qx4

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OWNER’S MANUAL
The
Discovery 3300
is a professional metal
detector. While the most
difficult aspects of metal detecting
have been automated, it is a
sophisticated electronic device which
requires an understanding of some basic
features and metal detecting concepts.
If you do not have prior experience with a
metal detector, we strongly recommend that you:
1) Adjust the Sensitivity to a low setting in the event
of false signals. Always begin use at a reduced
sensitivity level; use at full sensitivity after you have become
familiar with the detector.
2) Do not use indoors. This detector is for outdoor use only. Many
household appliances emit electromagnetic energy, which can
interfere with the detector. If conducting an indoor demonstration,
turn the sensitivity down and keep the search coil away from
appliances such as computers, televisions and microwave ovens.
If your detector beeps erratically, turn off appliances and lights,
especially those with dimmer switches.
Also keep the search coil away from objects containing metal, such
as floors and walls.
3) Read this manual. Most importantly, review the Quick-Start Demo
(p.7-8) and Basic Operation (p. 9-11).
4) Use 9-volt ALKALINE batteries only. Do not use Heavy Duty
Batteries.

TABLE OF CONTENTS
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . .3
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Quick-Start Demo . . . . . . . . . . . . . . . . . . . . .7-8
Basic Operation . . . . . . . . . . . . . . . . . . . . .9-12
All Metal . . . . . . . . . . . . . . . . . . . . . . . . .10
Discrimination . . . . . . . . . . . . . . . . . . . . .10
Notch . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Zap . . . . . . . . . . . . . . . . . . . . . . . . . .11-12
Pinpoint . . . . . . . . . . . . . . . . . . . . . . . . .12
Audio Target Identification . . . . . . . . . . . . . .13
Target and Depth Display . . . . . . . . . . . . .14-15
Sensitivity Adjustment . . . . . . . . . . . . . . . . . .16
In The Field Techniques . . . . . . . . . . . . . .17-22
Ground Balancing . . . . . . . . . . . . . . . . . . . . .20
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . .23
Treasure Hunter’s Code of Ethics . . .Back Cover
Warranty . . . . . . . . . . . . . . . . . . . . .Back Cover
2

TERMINOLOGY
The following terms are used throughout the manual, and are standard
terminology among detectorists.

ELIMINATION - Reference to a metal being "eliminated" means that the
detector will not emit a tone, nor light up an indicator, when a
specified object passes through the coil’s detection field.
DISCRIMINATION - When the detector emits different tones for different
types of metals, and when the detector "eliminates" certain metals,
we refer to this as the detector "discriminating" among different
types of metals.
Discrimination is an important feature of professional metal
detectors. Discrimination allows the user to ignore trash and
otherwise undesirable objects.
NOTCH - Notching is the elimination of an item, or range of items, within
the metallic spectrum. We “notch-out” an object, or objects,
selectively. Objects to the left and right on the metallic spectrum
can be retained using the notch technique.
RELIC - A relic is an object of interest by reason of its age or its association
with the past. Many relics are made of iron, but can also be made
of bronze or precious metals.
IRON - Iron is a common, low-grade metal that is an undesirable target
in certain metal detecting applications. Examples of undesirable
iron objects are old cans, pipes, bolts, and nails.
Sometimes, the desired target is made of iron. Property markers,
for instance, contain iron. Valuable relics can also be composed of
iron; cannon balls, old armaments, and parts of old structures and
vehicles can also be composed of iron.
FERROUS - Metals which are made of, or contain, iron.
PINPOINTING - Pinpointing is the process of finding the exact location of a
buried object. Long-buried metals can appear exactly like the
surrounding soil, and can therefore be very hard to isolate from
the soil.
PULL-TABS - Discarded pull-tabs from beverage containers are the most
bothersome trash items for treasure hunters. They come in many
different shapes and sizes. Pull-tabs can be eliminated from
detection, but some other valuable objects can have a magnetic
signature similar to pull-tabs, and will also be eliminated when
discriminating out pull-tabs.
GROUND BALANCE - Ground Balancing is the ability of the detector to
ignore, or "see through," the earth’s naturally occurring minerals,
and only sound a tone when a metal object is detected. The
Discovery 3300 incorporates proprietary Super-Scan™ circuitry to
eliminate false signals from severe ground conditions
3

ASSEMBLY
Assembly is easy and requires no tools.
1 Position the lower stem (the straight tube)
●
with the silver button toward the back.
Using the bolt and knurled knob,
attach the search coil to the
plastic extension protruding
from 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 search coil parallel to
the ground in front of you.

3 Wind the cable securely around the stem.
●
4 Insert
●

the plug into the
matching connector on
the right underside of the
detector body. Be sure
that the key-way and
pins line up correctly.

Caution:

4

Do not force the
plug in. Excess force
will cause damage.
To disconnect the
cable, pull on the
plug.
Do not pull
on the cable.

ASSEMBLY
Adjusting the Arm Rest
Most people will find the standard position
of the arm rest very comfortable. Very large
forearms and short forearms (particularly
children’s arms), can be accommodated
by moving the arm rest forward.
The arm rest is adjustable to three positions.
To adjust, remove the screw from the
underside, then press the silver button
and move the arm rest to one of the
alternate positions. If you cannot fully
depress the button with your finger, use
a narrow object, such as the blunt end
of a ballpoint pen. The arm rest must
be twisted with moderate force to move
it to an alternate position; this
adjustment is usually made infrequently.

If desired for added stability, re-install
the screw. The screw is not re-installed
in the furthest forward position.
If the button becomes disengaged inside
of the tube, remove the plastic cap at the
end of the tube to access the clip inside.
With a pair of needle-nose pliers,
reengage the button. Then replace the
plastic cap.

5

BATTERIES
Use ALKALINE
batteries only.

To install the
batteries:

1 Remove
●

the
battery cover by
disengaging the
clip at the back.

2 Align the polarity
●

of the batteries
correctly, with
the positive "+"
toward the coil
plug connection,
as indicated by
the
+
and
–
indicators
on
the
housing.

3 Insert (2) 9-Volt ALKALINE batteries, with the contacts pointed inward,
●
and press down on the back of the batteries to snap them into place.

Some brands of batteries will require moderate force to clear the
retaining tabs.
IN CASE OF LOOSE BATTERIES
If the batteries fit loosely, and you
want to guarantee a very secure
electrical contact, insert a piece of
paper or thin cardboard between the
back of the battery and the
supporting post.

4 Replace the battery door.
●
Most metal detector problems are due to improperly installed batteries,
or the use of non-alkaline or discharged batteries. If the detector does
not turn on, please check the batteries.
If the detector does not turn on, check to see that the batteries fit tightly.
If the batteries are loose, press them forward while pressing the POWER
touch pad. To tighten up a loose battery, wedge a piece of paper or thin
cardboard between the back of the battery and the supporting post, as
illustrated above.
6

QUICK-START DEMONSTRATION
I. Supplies Needed
• A Nail
• A Quarter
• A Pull-Tab from a beverage can • A Zinc Penny (dated after 1982)
II. Position the Detector
a. Place the detector on a
table, with the search coil
hanging over the edge.
(or better, have a friend
hold the detector, with
the coil off the ground)
b. Keep the search coil
away from walls, floors,
and metal objects.
c. Remove watches, rings and other jewelry or metal objects from
hands and wrists.
d. Turn off appliances or lights that cause electromagnetic
interference.
e. Pivot the search coil back
toward the detector body.
III. Power Up
Press the POWER touch pad.
IV. Wave each Object over the
Search Coil
a.Notice a different tone for each object.
Bass Tone:
Nail
Low Tone:
Pull-Tab
Medium Tone: Zinc Penny
High Tone:
Quarter
b.Motion is required. Objects
must be in motion over the
search coil to be detected.
V. Press the DISC A-M touch pad
The detector will beep twice
and 3 “R”’s will appear under
the iron indicators.
Quick-Start Demo continued
on next page
7

QUICK-START DEMONSTRATION (continued)
VI. Wave the Nail over the Search Coil
a. The Nail will not be detected.
b. The Nail has been "Discriminated Out."
VII. Press the “DISCRIMINATION▲” touch pad twice.
Five “R”s are now displayed.
VIII. Wave all objects over the
Search Coil
The Nail and Pull-Tab will not be detected.
The other objects will be detected with their own distinctive tones.
IX. Press the NOTCH touch pad.
A flashing “R” will appear
under the 5¢/PT segment.
X. Press the DISCRIMINATION ▲
touch pad three times.
The flashing “R” will move to the
ZINC segment.
XI. Press the NOTCH touch pad again.
The “R” will appear under zinc.
XII. Wave the zinc penny over the search coil.
The penny is discriminated out.
XIII. Press the DISC A-M touch pad
The detector returns to ALL-METAL mode. No “R”s are displayed.
All types of metals will be detected.
XIV. Wave the pull-tab over the coil.
XV. Press the ZAP touch pad.
An “R” will appear.
XVI. Wave the pull-tab over the
search coil again.
The pull-tab (the most recently detected item) is eliminated from
detection.
XVII. Press the PINPOINT touch pad.
Hold one of the metal objects motionless over the search coil.
• All Metal objects are now detected.
• Depth and Target indicator do not illuminate in this mode.
• One monotone sound indicates the presence of any type of metal.
8

BASIC OPERATION
POWERING UP
Press the POWER
touch pad.
• The detector will
beep 4 times
• All display
segments will
illuminate
momentarily
• The SENSITIVITY
and BATTERY
indicators will
stay illuminated

MOTION and NO-MOTION MODES
Depending on the operation mode selected, the Discovery 3300
detects metal both with the coil in motion, or with the coil motionless.
In the PINPOINT mode of operation, metal is detected with the coil
motionless over the ground. This no-motion operation helps to locate
the exact location of buried objects, and is very useful in
understanding the size and shape of buried metal objects. The
PINPOINT mode offers deeper ground penetration, but cannot
classify targets, nor indicate their depth.
The other operating modes require the coil to be in motion to detect
a target. When in the DISCRIMINATION, ALL-METAL or NOTCH
modes, the coil must be in continuous motion. It is often useful to
search for targets in a motion mode, and when identified, pinpoint
their location with the PINPOINT control.

SENSITIVITY
At its default sensitivity setting, the detector will detect a coin-sized
object, such as a quarter, buried approximately seven inches deep.
To change the sensitivity level, and thus the detection depth, press the
SENSITIVITY ▲ or ▼ keys. The 6-segment scale at the left of the
display, above “coin depth”, indicates the sensitivity level when these
touch pads are depressed.

CAUTION:

At higher sensitivity levels, the detector is susceptible to electromagnetic
interference from electronic devices. Reduce sensitivity if demonstrating
indoors or if using near power lines or electrical equipment.
Reduce sensitivity if detector emits false signals

9

BASIC OPERATION continued
ALL METAL MODE (Default Operation)
The detector defaults to ALL METAL mode after powering on. In this
mode, all types of metals will be detected. An object’s PROBABLE
identification is indicated by the arrows at the top of the display. In
addition, the PROBABLE depth of coin-sized objects is indicated by
the rectangular segment indicators on the left side of the display. All
detected objects will cause the depth indicator to illuminate. The
depth indication is not accurate for larger objects; however, it will
provide accurate relative depth indications. The greater the distance
an object is from the search coil, the greater its depth value.

DISC/ A-M Touch Pad
Pressing this touch pad will cause the
detector to toggle between two
operating modes, DISCRIMINATION
and ALL-METAL. If the detector is in the
ALL-METAL mode (the default mode),
pressing the touch pad will change the
detector into DISCRIMINATION mode.
If
the
detector
is
in
the
DISCRIMINATION mode, pressing the
touch pad will change the detector into
ALL-METAL mode.

DISCRIMINATION MODE
Discrimination is used to eliminate unwanted objects from detection.
To enter this mode, from ALL-METAL mode, press the DISC/A-M touch pad.
After pressing DISC/A-M, the detector will:
• Beep twice
• Display 3 "R"s under the left-most segments, Iron 1, 2 & 3
Ferrous objects will not be detected in DISCRIMINATION mode.
Heavily oxidized ferrous objects will sometimes, however, be
detected, usually with a high tone and an indication to the right
of the target identification scale.
To increase the level of discrimination, press the DISCRIMINATION ▲
touch pad. Each time the ▲ pad is depressed, an additional "R" will
appear, thus eliminating from detection the objects which fall into the
corresponding categories.
To decrease the level of discrimination, press the DISCRIMINATION ▼
touch pad. Each time the ▼ pad is depressed, an illuminated "R" will
10

BASIC OPERATION continued
disappear, thus returning to detection the objects which fall into the
corresponding categories.
Discrimination Mode is a fixed-start-point elimination system. Objects
are cumulatively eliminated as the level of discrimination increases.

NOTCH MODE
To selectively eliminate a category from detection within the metallic
spectrum, use the NOTCH Mode.
Technical Note:
The NOTCH touch pad causes the status of an "R" segment to
toggle between ON and OFF.
To use the NOTCH Mode:
The NOTCH touch pad can be depressed at any time. But for
first-time use, place the detector in ALL-METAL mode.
A first demonstration is best accomplished as follows:
1) Turn the power OFF.
2) Turn the power ON.
3) Press NOTCH.
A flashing "R" will appear under the IRON-1 segment.
4) Press the DISCRIMINATION ▲ touch pad several times.
Notice that the "R" moves upon each press of the
DISCRIMINATION ▲ touch pad.
5) Press NOTCH again.
The flashing "R" will become permanently illuminated.
If an object has been “notched-out”, you can return it to detection
status. To “un-notch” a category:
1) Press NOTCH.
2) Move the flashing “R” over the permanently illuminated “R”,
using the DISCRIMINATION ▲ or ▼ touch pads.
3) Press NOTCH again.

ZAP
The ZAP control is a convenient way to eliminate a known undesirable
metal object from detection.
To demonstrate the ZAP control:
1) Set the detector in All-Metal Mode
Note: ZAP functions in all motion modes, but is best demonstrated
first from the All-Metal Mode.
2) Pass the search coil over an undesirable object.

11

BASIC OPERATION continued
3) Notice the Target Indication
Note: You can only ZAP objects that register under the
seven left-most segments (from Iron to Zinc).
4) Press ZAP. An "R" appears under the segment to be eliminated.
5) Pass the search coil over the same object again.
The undesirable object is eliminated from detection
The ZAP control is easy to use in the field. As you are detecting, and
encounter an object which you wish to eliminate from detection,
simply press the ZAP touch pad after detecting the object.
The ZAP control eliminates the most-recently detected object category
from detection. The category eliminated is indicated with an "R".

PIN POINT MODE
Since long-buried objects can appear exactly like the surrounding soil,
the process of finding the exact location of a small object, such as a
coin, can be time-consuming and frustrating. Objects buried many
inches deep present an especially daunting challenge. In addition,
during the unearthing process, care must be taken not to damage
valuable relics. The best solution to these problems is the no-motion
PINPOINT mode.
At any time during operation, press the PINPOINT touch pad, and the
detector enters the no-motion mode. In the PINPOINT mode, any
object in the coil’s detection field will induce a monotone hum. The
location of a coin-sized object can be discerned with pinpoint accuracy
as it will induce a tone only when it falls within the inner circle of the
search coil. Pass the coil slowly over and around the target zone, and
you will quickly see the target’s exact location.
Be sure that the detector is properly GROUND BALANCED before using
the PINPOINT MODE. See page 20 for manual ground balancing
instructions. Also, consult page 22 for proper no-motion field techniques.
The Target Identification and Target
Depth indicators are disabled in this
mode. To discern the identification and
depth of an object, you must use one of
the motion modes of operation.

HEADPHONE JACK
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
Discovery 3300 Metal Detector has a
stereo headphone jack located at the
rear of the case.
12

AUDIO TARGET IDENTIFICATION (motion modes only)
While the LCD (Liquid Crystal Display) is very accurate in identifying
buried objects, the user in the field does not always maintain the display
screen in his field of vision. Therefore, we have incorporated an audio
feedback mechanism to alert the user to the nature of buried objects.
This audio feedback system first alerts the user to the presence and
classification of objects, whose nature and location can be confirmed
using the LCD display.
The 4-tone audio target identification system functions only in the motion
modes of operation. The detector must be in the DISCRIMINATION,
NOTCH or ALL-METAL modes, as indicated on the display. In PINPOINT
mode, the detector will emit only a monotone sound.
The detector can sound four different tones, depending on the object detected.
BASS TONE
Ferrous objects, such as iron and steel, will induce a bass tone.
The smallest gold objects can also induce a bass tone.
LOW TONE
Pull-Tabs, nickels & smaller gold
MEDIUM TONE
Newer pennies (post-1982), larger gold objects, zinc, small brass
objects, and most bottle screw caps will induce medium tones.
Many recent vintage foreign currencies will induce medium tones.
HIGH TONE
Silver and copper coins, larger brass objects, older pennies (pre1982), and highly oxidized metals will induce high tones. Quarters,
dimes and other precious coins fall into this category.
BASS TONE

Nails, Iron Objects,
& Smallest Gold Objects

LOW TONE

MEDIUM TONE

HIGH TONE

Pull Tabs, Nickels,
& Smaller Gold

Zinc Pennies (Post
1982), Larger Gold
Objects, Many screw
caps

Copper, Silver & Brass
Copper Pennies (Pre
1982)

Audio Target Identification (ATI) classifies metals into four categories.

13

DEPTH AND TARGET DISPLAY (motion modes only)
READING THE DISPLAY
The Liquid Crystal Display (LCD) shows
the PROBABLE identification of the
targeted metal, as well as the PROBABLE
depth of the target, in inches.
The detector will register a repeating,
unchanging target identification when a
buried target has been located and
identified. If, upon repeated passes over
the same spot, the target identification
reads inconsistently, the target is probably
a trash item, or oxidized metal. With
practice, you will learn to unearth only the
repeatable signals.
The segment identifications are highly
accurate, when detecting the objects
described on the label. However, if you
register in a given category for an unknown
buried object, you could be detecting a
metallic object other than the object
described on the label, but with the same
metallic signature. Also, the greater the
distance between the target and the coil,
the less accurate the target identification.
GOLD TARGETS Gold objects will
register on the left side of the LCD scale.
Gold will register depending upon its
size. The smaller the gold object, the
further to the left it will register.
Gold flakes will register under Iron-1
Small gold items will register under Iron
or 5¢/PT.
Medium-sized gold items will register
under PT or S-cap.
Large gold items will register under Scap or Zinc.
SILVER TARGETS: Silver objects will
register to the right of the scale, under
25¢, 50¢, or $1, depending on the size
of the object. The larger the object, the
farther to the right it will register.
IRON: Ferrous objects will register on
the far-left side of the target
identification scale. 1, 2, or 3 indicates
the relative size of iron objects. Small
nails, for instance, will usually
illuminate the Iron-1 arrow whereas
large structural ferrous objects will
usually illuminate the Iron-3 arrow.
14

Objects in this category could be worthless
scrap, or a more valuable iron relic.
5c/PT: Nickels and most newer pulltabs(those that stay attached to the
can) will register here.
PT(pull-tabs): Pull-tabs from older
beverage cans will register here. Few
newer pull-tabs will also register here.
Many gold rings will also register here.
S-CAP: Older screw caps from glass
bottles will register here. Large gold
rings, like a class ring, could also register
here. Some non-U.S. coins of recent
vintage will also register here.
ZINC: Newer pennies (post-1982) will
register here. Many non-U.S. coins of
recent vintage will also register here.
Cu10¢: Dimes and pre-1982 pennies will
register here. Older, pre-1982, pennies
are composed of copper, which has a
metallic signature similar to a dime. Most
copper coins will register here.
Caution: The target indications are visual
references. Many other types of metal
can fall under any one of these
categories. While the Discovery 3300 will
eliminate or indicate the presence of most
common trash items, it is impossible to
accurately classify ALL buried objects.

DEPTH INDICATOR:
The Depth Indicator is accurate for
coin-sized objects. It indicates the
depth of the target, in inches. Large
and irregularly-shaped objects will
yield less reliable depth readings
When passing over an object, the
depth indicator will light up and stay
illuminated until another object is
scanned. Repeated indication at the
same depth level indicates an accurate
target detector. If the depth indication
varies with each sweep, try sweeping
at different angles; there may be more
than one target present. With practice,
you will learn the difference between
accurate readings, multiple targets, and
highly erratic readings which evidence
trash or irregularly shaped objects.

DEPTH AND TARGET DISPLAY (motion modes only)
THREE DIGIT TARGET INDICATOR
The three digit target indicator, in the
middle of the LCD display, provides a
specific target value to help identify buried
targets more accurately. With practice in
the field, you will learn to associate target
values with the probable identification of

buried objects. The target value can vary
each time the coil passes over the target,
depending upon the angle of the object
and the distance from the coil. As a
starting point, refer to the table below.

TARGET Readout
The table below list some common approximate target value
equivalents. With experience in the filed, you will recognize
many types of metals by their numeric value.
VALUE RANGE

POSSIBLE OBJECTS

0-10

Iron

30-39

Nickel

43-48

Pull-Tab

53-60

Screw Cap

62-74

Zinc, Penny

83-88

Wheat Cent

86-100

Dime

107-127

Quarter

105-120

Liberty Dollar

120-126

Franklin Half Dollar

134-150

Silver Dollar

150-199

Large metal Object

15

SENSITIVITY ADJUSTMENT
ELECTROMAGNETIC
INTERFERENCE
The principle use for the
Sensitivity Control is to
eliminate Electromagnetic
Interference (EMI).
A hobby metal detector is an
extremely sensitive device;
the search coil creates its
own magnetic field and acts
like an antenna. If your
detector beeps erratically
when the search coil is
motionless, the unit is probably detecting another electromagnetic field.
Common sources of EMI are electric power lines, both suspended and
buried, motors, and household appliances like computers and
microwave ovens. Some indoor electronic devices, such as dimmer
switches used on household lighting, produce severe EMI and can cause
the detector to beep erratically. Other metal detectors also produce their
own electromagnetic fields; so if detecting with a friend, keep two metal
detectors at least 20 feet apart.
If the detector beeps erratically, REDUCE THE SENSITIVITY by
pressing the Sensitivity ▼ Pad on the left of the control panel.

SEVERE GROUND CONDITIONS
A secondary use for the Sensitivity Control is to reduce false detection
signals caused by severe ground conditions. While your Discovery 3300
contains circuitry to eliminate the signals caused by most naturally
occurring ground minerals, 100% of all ground conditions cannot be
anticipated. Highly magnetic soils found in mountainous and goldprospecting locations can cause the detector to emit tones when metal
objects are not present. High saline content soils and sands can
sometimes cause the detector to false.
If the detector emits false, non-repeatable, signals, REDUCE THE
SENSITIVITY.

MULTIPLE TARGETS
If you suspect the presence of deeper targets beneath a shallower target,
reduce the sensitivity to eliminate the detection of the deeper targets, in
order to properly locate and identify the shallower target.
16

IN THE FIELD TECHNIQUES (motion modes only)
PINPOINTING

COIL MOVEMENT

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

When swinging the coil,
careful to keep it level with
ground about 1/2 inch from
surface. Never swing the coil
a pendulum.

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”
sounds.
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” sounds.
6. If needed, “X” the target at
different angles to “zero in” on
the exact spot on the ground at
which the “beep” sounds.

be
the
the
like

WRONG

CORRECT

When pinpointing a target, try drawing an “X”,
as illustrated, over where the tone is induced.

17

IN THE FIELD TECHNIQUES (motion modes only)
Swing the search coil slowly,
overlapping each sweep as you
move forward. It is important
to sweep the coil at a consistent
speed over the ground as you
search.
After identifying a
target, your sweep technique
can help in identifying both the
location and the nature of the
target. If you encounter a weak
signal, try moving the coil in
short, rapid sweeps
over the target zone;
such a short rapid
sweep may provide
a more consistent
target
identification.
Most
worthwhile
objects
will

WHAT
READS
LIKE THIS
18

respond with a repeatable tone.
If the signal does not repeat
after sweeping the coil directly
over the suspected target a few
times, it is more than likely
trash metal.
Crossing the target zone with
multiple intersecting sweeps at
multiple angles is another way
to verify the repeatability of the
signal, and the potential of the
buried target. To use this
method, walk around the target
area in a circle, sweeping the
coil
across
the
target
repeatedly, every 30 to 40
degrees of the circle, about ten
different angles as you walk
completely around the target.
If a high-tone target completely
disappears from detection at a
given angle, chances are that
you are detecting oxidized
ferrous metals, rather than a
silver or copper object. If the
tone changes at different

…MAY
ACTUALLY
BE THIS

IN THE FIELD TECHNIQUES (motion modes only)
angles,
you
may
have
encountered multiple objects.
If you are new to the hobby,
you may want to dig all targets
at first. With practice in the
field, you will learn to better
discern the nature of buried
objects by the nature of the
detector’s response.
You may encounter some false
signals as you proceed. False
signals occur when the detector
beeps, but no metal target is
present. False signals can be
induced by electromagnetic
interference, oxidation, or
highly mineralized ground
soils. If the detector beeps
once, but does not repeat the
signal with several additional
sweeps over the same spot,
there is probably no target
present.

You will be surprised just how
much trash metal and foil you
will find in some areas. The
trashiest areas have been
frequented by the most people,
and frequently hold the most
promise for finding the most
lost valuables.
To make
searching easier in very trashy
areas, consider purchasing a 4inch Search Coil (Radio Shack
item 63-3009 or 63-3014).
The 4-inch coil’s narrower
detection field can better
distinguish
between
two
objects in close proximity.
Also maintain the search coil
positioned just above the
surface of the ground, without
making contact with the
ground. Making contact with
the ground can cause false
signals.

When searching very trashing
ground, it is best to scan small
areas with slow, short sweeps.

19

IN THE FIELD TECHNIQUES - Pinpoint Mode
GROUND BALANCING
Before using the PINPOINT mode, it is necessary to “Ground Balance”
your detector, this ground balancing adjustment offsets the effects of
minerals and salts in the ground.
To GROUND BALANCE your detector:
1. Using the ALL-METAL mode, find a patch of ground which is free of
metal objects. You will use this section of ground to test the detector.
The presence of any metal objects in this area will interfere with this
procedure.
2. Begin with the ground
balance KNOB in the PRESET
position.

3

2

3. Lift the search coil waist high in the air.

4. Press the PINPOINT
touch pad.

4

20

IN THE FIELD TECHNIQUES - Pinpoint Mode
5. Lower the search coil to the
ground,
maintaining
it
elevated about 1/2 inch above
the surface (be sure that this
ground does not contain
metal).
• If the detector emits
sound with the search coil 1/2 inch over the ground, further
ADJUSTMENT IS NECESSARY.
• If the detector remains silent with the searchcoil 1/2 inch over
the ground, no further adjustment is necessary; the detector is
“GROUND BALANCED”.
6. If the detector emits sound with the coil over the ground in STEP 5,
further adjustment of the ground balance KNOB is required as
follows:
• Lift the search coil waist high
• Rotate the ground balance KNOB clockwise 1/16 of a turn
• Press PINPOINT
• Lower the search coil to the ground again
If the detector still emits a tone, repeat this procedure. You are
searching for the ground balance knob position where the detector is
just silent.
It is important to move the knob in small increments in order to find
the first setting (moving clockwise) at which the detector remains
silent. To insure yourself of the optimal adjustment, move the KNOB
slightly counterclockwise from a silent-adjusted position to check for
the most counterclockwise silent position possible.
If the KNOB is over-adjusted in the clockwise direction, the detector
can lose sensitivity. An over-adjusted condition can also cause the
detector to sound off when the coil is lifted away from the ground.
As your search takes you to different areas, verify the ground balance
setting periodically using the above procedure. Within a geographical area,
ground conditions can change. Varying elevations, proximity to water, and
concentrations of rock, sand or clay can all affect ground condition and
sometimes require recalibration with the ground balance knob.
• If the detector remains silent with the search coil 1/2 inch over
the ground, no further adjustment is necessary; the detector is
“GROUND BALANCED.”
21

IN THE FIELD TECHNIQUES - Pinpoint Mode
In the Pinpoint Mode, coil sweep technique is not important. Rather, user
retuning is critical.
The detector does not automatically adjust to changing ground and
environmental conditions; the operator is required to make the adjustment. If
the detector sounds a constant tone over all areas of the ground, retune the
detector by pressing the PINPOINT button.

RETUNING
Keep the coil still, just above the ground surface, and press the PINPOINT button.
Make sure that the spot on the ground you chose for tuning did not contain
metal; pass over the area with the coil again to insure that the detector does
not emit a tone.

TEMPERATURE CHANGE
If the detector moves from one temperature environment to another, or if the
temperature changes, you must retune the detector until the temperature
stabilizes. If you move from a cooler to a warmer environment, the detector may
emit a constant tone; if so, retune. If you move from a warmer to cooler
environment, the detector may lose sensitivity; if so, retune.

PINPOINTING
Detection Field
The detection field depends on the size of the
target.
Large Objects
After detecting a target, lift the coil off the ground to a
distance where you hear the faintest tone. Move the coil over the ground at
this height. If the tone does not fade, you have detected a large or irregularly
shaped object. Outline the object with slow coil movements.
If you can outline an area larger than the size of the inside coil, you then have
a large target, or several targets.
Large objects can be detected when they enter the range of the outside coil.
Small Objects
After detecting a target, hold the search coil above the
ground, at a distance where you hear the faintest
tone. While maintaining the coil at this height above
the ground, move the coil from side-to-side. Note
the spot where the tone is loudest. Then move
the coil toward the ground to zero-in on the
target’s location.

22

A coin-size object will be detected when the
object enters the range of the inner coil.

TROUBLE SHOOTING
TROUBLE SHOOTING GUIDE
SYMPTOM

CAUSE

Detector chatters
• Using detector
or beeps erratically
indoors
• Using detector near
power lines
• Using 2 detectors in
close proximity
• Highly oxidized
buried object
• Environmental
electromagnetic
interference

SOLUTION
• Use detector
outdoors only
• Move away
from power lines
• Keep 2 detectors
at least 20’ apart
• Only dig up
repeatable
signals
• Reduce sensitivity
until erratic
signals cease

Constant low tone • Discharged batteries • Replace batteries
or constant repeating
tones
• Wrong type of
• Use only 9V
batteries
alkaline batteries
LCD does not lock • Multiple targets
on to one target ID
present
or detector emits
• Highly oxidized
multiple tones
target
• Sensitivity set
too high

• Move coil slowly
at different angles
• Reduce sensitivity

No power, no
sounds

• Dead batteries
• Replace batteries
• Poor battery
• Push batteries in
contact
tighter
• Cord not connected • Insert paper spacers
securely
(see page 6)
• Check connections
Detector sounds
• Ground Balance
• Move Ground
continuous tone in
over-adjusted
Balance knob
Pinpoint Mode when
counter-clockwise
coil is lifted away
from ground.
Detector sounds con- • Detector needs to be • Press Pinpoint
tinuous tone with
retuned
• Re-ground balance
coil over ground
23

TREASURE HUNTER’S CODE OF ETHICS:
1.
2.
3.
4.
5.

Respect the rights and property of others.
Observe all laws, whether national, state or local.
Never destroy historical or archaeological treasures.
Leave the land and vegetation as it was. Fill in the holes.
All treasure hunters may be judged by the example you set.
Always obtain permission before searching any site. Be
extremely careful while probing, picking up, or discarding trash
items. And ALWAYS COVER YOUR HOLES!
Limited Ninety-Day Warranty

This product is warranted by Radio Shack against manufacturing defects in material and workmanship
under normal use for ninety (90) days from the date of purchase from Radio Shack company-owned stores
and authorized Radio Shack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Radio Shack
MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING THOSE OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE
DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. EXCEPT AS PROVIDED
HEREIN, Radio Shack SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER
PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR
INDIRECTLY BY USE OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS
WARRANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE,
LOSS OF TIME, DATA, PROPERTY REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, EVEN IF Radio Shack HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation
of incidental or consequential damages, so the above limitations or exclusions may not apply to you. In
the event of a product defect during the warranty period, take the product and the Radio Shack sales receipt
as proof of purchase date to any Radio Shack store. Radio Shack will, at its option, unless otherwise
provided by law: (a) correct the detect by product repair without charge for parts and labor; (b) replace the
product with one of the same or similar design; or (c) refund the purchase price. All replaced parts and
products, and products on which a refund is made, become the property of Radio Shack. New or
reconditioned parts and products may be used in the performance of warranty service. Repaired or
replaced parts and products are warranted for the remainder of the original warranty period. You will be
charged for repair or replacement of the product made after the expiration of the warranty period. This
warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse, accident,
misuse, improper or abnormal usage, failure to follow instructions, improper installation or maintenance,
alteration, lighting or other incidence of excess voltage or current; (b) any repairs other than those provided
by a Radio Shack Authorized Service Facility; (c) consumables such as fuses or batteries; (d) cosmetic
damage; (e) transportation, shipping or insurance costs; or (f) costs of product removal, installation, setup service adjustment or reinstallation.
This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state.
Radio Shack Customer Relations, 200 Taylor Street, 6th Floor, Fort Worth, TX 76102
Copyright© 2002 by First Texas Products, L.P.
All rights reserved, including the right to reproduce this book, or parts thereof, in any form.
Published by First Texas Products, L.P.
Bounty Hunter® is a registered trademark of First Texas Products, L.P.

www.detecting.com

First Texas Products, LP
1100 Pendale Road
El Paso, TX 79907
(915) 633-8354



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