Whites Coinmaster GT Manuel utilisateur

Coinmaster GT

White’s Electronics, Inc.

Sweet Home, Oregon USA

Building the World’s Finest

metal detectors for over 60 years.

Page 2

Coinmaster GT

Owner’s Manual

CONTENTS

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

QuickStart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Controls

On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Tone ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Trac Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Beach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Pinpoint/All Metal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

More Info

VDI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Depth & Discrimination . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Coil Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Sweep Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Sizing, Pinpointing, & Digging . . . . . . . . . . . . . . . . . . . . 13

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Code of Ethics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover

Page 3

Coinmaster GT

Owner’s Manual

Introduction

The Coinmaster GT (or CoinGT) is an easy-to-use metal

detector with features and performance that rival more expen-

sive models. The CoinGT has automatic ground tracking (Auto-

Trac®) which maximizes performance across many different

ground conditions. It also features a 9-zone discriminator with

both audio and visual target identification. Each zone may be

accepted or rejected, providing the user with a way to ignore

certain types of targets like iron or foil.

In normal search mode (i.e., “Disc” mode) the audio has a

silent threshold and optional Tone ID with 9 tones that correlate

to the 9 different discrimination zones. In addition to the audio

response, the display provides visual information with an icon

cursor that points to a probable target type and a Visual Display

Indicator (VDI) number that provides even more detailed target

information (see More Info for an explanation of VDI numbers).

An estimated target depth is given by the depth bar. The Pin-

point and All Metal modes provide an audible threshold tone

and a user-selectable VCO response or a loudness response

(non-VCO).

The CoinGT uses 8 “AA” batteries and will typically run 25

hours on fresh alkaline batteries. The display includes an

optional backlight which allows for extended hunting, but will

increase battery consumption.

Low battery

indicator

Backlight

indicator

Sensitivity

strength

Tone ID mode

indicator

Disc cursor

Reject icons

Depth bar

Numeric VDI

and depth

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Coinmaster GT

Owner’s Manual

Assembly

1. Remove all parts from the shipping carton and check assem-

bly diagram to ensure all parts are present.

2. Install black rubber washers on fiber clevis/lower rod, insert

clevis lower rod onto loop ears. Use only nonmetallic wash-

ers, fiber bolt, and fiber thumb nut to secure loop/search coil

to clevis/lower fiber rod.

3. Insert clevis/lower rod into curved “S” rod so that stainless

steel spring clip buttons line up and lock into one of the

adjustment holes in the curved “S” rod. The second or third

adjustment holes are suitable for average sized adults.

4. Wind the loop cable around the rod assembly, first revolu-

tion over the top of the rod, all the way to the top of the

curved “S” rod, about five revolutions. Use the black cable

retainers, one near the loop, and one near the top of the

curved “S” rod, to hold the loop cable in place. Plug the

cable into the jack on the front of the control box.

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Coinmaster GT

Owner’s Manual

5. Grip the instrument by the handle, with your arm in the

elbow cup with strap and sweep the loop/search coil over

the floor. If the instrument fit feels uncomfortable, readjust

clevis/lower rod length with spring clip button and cam-

lock so that search coil can be held near the floor without

stooping over.

6. Adjust the elbow cup strap so that it is loose enough for you

to slide your arm in and out without loosening each time

you want to set the detector down. The elbow cup strap pro-

vides extra leverage and control. However, some prefer not

to use it.

7. Install the battery pack.

Batteries

1. Remove the battery pack by pressing both buttons on sides

of battery compartment.

2. Slide open the tray cover. Install eight (8) “AA” alkaline

batteries taking note of correct (+) and (-) positions and

close cover.

3. Slide battery pack into compartment. A vigorous ‘slam’

may be needed to ensure a good seating.

4. Press ON/OFF button. Good batteries will produce a high

pitched beep on power-up. A low pitched beep indicates

low batteries.

5. Batteries that are weak, or become weak during use, will

automatically indicate Low Batt with a battery icon on the

center portion of the display. A three-beep alarm also

sounds to indicate batteries are too low for operation.

6. Most alkaline batteries will give about 25 hours of continu-

ous operation. Battery life will vary with intermittent use,

back-light use, temperature, control settings, target indica-

tions, battery quality, battery condition upon purchase, and

Page 6

Coinmaster GT

Owner’s Manual

shelf life. It is a good idea to carry back up batteries.

7. A rechargeable NiMH battery pack may be purchased sepa-

rately. Rechargeable batteries typically provide similar or

slightly less run time than alkaline batteries.

QuickStart

1. Turn on the power.

2. The CoinGT has automatic ground tracking. To speed up

the initial tracking process, find a spot free of targets and

bob the coil up & down a few times (optional).

3. Sensitivity (SENS) defaults to a reasonable level. If the

audio is chattery or constantly overloads, reduce the sensi-

tivity level.

4. Sweep the search coil from

side-to-side, keeping the coil

level and close to the ground.

Overlap each sweep by 50%

to avoid missing targets.

5. Once a target is detected, use

the Pinpoint button to isolate

its exact location.

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Coinmaster GT

Owner’s Manual

Controls

ON/OFF

Besides the obvious, the ON/OFF button also controls the

display backlight. Press and hold the button to toggle the back-

light.

SENS

The Sensitivity control increases or decreases the respon-

siveness of the CoinGT. Normally, this determines how deep the

detector will “see” a target.

However, increasing the sensitivity not only increases the

response to target signals, but also that of ground signals and

electromagnetic interference (EMI). A common mistake is to

assume that higher sensitivity will always give better depth. In

air tests this is generally true, but ground results can depend on

the amount and type of mineralization.

In general, run the sensitivity as high as possible while

maintaining smooth operation. If the audio is chattery or the

ground is causing overload, reduce the sensitivity.

DISC

The Discrimination control allows you to enable or disable

the audio response for select ranges of targets. The CoinGT has

9 ranges:

1. Small iron

2. Large iron

3. Foil

4. Nickel

5. Pull tab

6. Zinc cent

7. Copper cent

8. Small silver

9. Large silver

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Coinmaster GT

Owner’s Manual

Use the circular arrow button to cycle the disc cursor

through the 9 ranges, and press the disc select button to

toggle the selection of a particular range. The range is disabled

when the symbol is displayed.

TONE ID

By default the CoinGT has a single tone audio response

regardless of the type of target. Pressing the TONE ID button

enables a multi-tone audio response whereby each of the 9 tar-

get zones has a different audio tone. When Tone ID is enabled a

“TONE ID” icon will appear on the display.

TRAC LOCK

The CoinGT has automatic ground tracking (AutoTrac®)

which effectively nulls most ground mineralization. If the audio

is chattery and reducing sensitivity doesn’t help, lock the

ground tracking with the Trac Lock button. Pressing Trac Lock

again immediately updates the ground tracking and returns to

AutoTrac®mode.

BEACH

Wet salt sand (and sometimes highly fertilized ground) is

mildly conductive and difficult for most metal detectors. The

Beach mode expands the ground tracking range of the CoinGT

to handle wet salt sand. You may still need to use a slower

sweep rate to avoid falsing. This mode is not recommended for

normal soils and may cause some targets to track out. Also gen-

erally not needed for dry beach sand.

P/P (ALL METAL)

The Pinpoint (P/P) button performs two functions. When

briefly pressed it switches the CoinGT in and out of “All Metal”

mode. Discrimination is not applied in the All Metal mode and

the CoinGT will respond to any metal target. However, Target

ID (both the VDI number and the icon cursor) and Depth indi-

cation work the same in All Metal mode as in Disc mode. Also

Page 9

Coinmaster GT

Owner’s Manual

like Disc mode, the All Metal mode requires that the coil be in

motion in order to respond to a target. If the coil is held steady

over a target it will get tuned out after a few seconds.

When the Pinpoint button is pressed and held it performs

the second function of enabling Pinpoint mode, which is typi-

cally used to assist in pinpointing a detected target. Pinpoint

mode is a true static mode in that audio response is maintained

as the coil is held steady over the target.

In both All Metal and Pinpoint mode a threshold audio is

applied and a target will cause the loudness to increase. The

CoinGT also supports VCO1audio whereby a target causes the

pitch of the threshold to increase. VCO audio is enabled by

pressing the Tone ID button while in Pinpoint mode.

Display

The CoinGT display provides information on the operation

of the detector as well as the detected target. On the right is the

segmented bar which shows the sensitivity level. On the left is

another segmented bar which shows the estimated target depth

in increments of 2”. A “TONE ID” icon indicates that multi-

tone audio is enabled. A low-battery icon will appear when bat-

tery voltage falls below about 9 volts.

A large 2-digit number gives the VDI response of the target

in both Disc and All Metal modes and the depth of the target in

Pinpoint mode. VDI responses are covered in the “More Info”

section. The numeric depth is given in 1/2” increments with no

decimal point. Therefore, a depth readout of “50” is 5 inches,

and a readout of “55” is 5.5 inches.

Across the top of the display are the segments for the 9 dis-

crimination zones. When a target is detected a pointer/cursor

points to the zone that corresponds to the type of target. Addi-

tionally, these zones can be disabled (rejected) by using the

Disc keypad buttons to move the cursor and select/deselect each

1. “VCO” means voltage-controlled oscillator

Page 10

Coinmaster GT

Owner’s Manual

zone. Rejecting a zone only affects the audio; the display will

still show target information even if you can’t hear an audible

response.

The CoinGT display includes a backlight for extended hunt-

ing. Press and hold the On/Off button to toggle the backlight. In

daylight it can be difficult to tell whether the backlight is on or

off, so a backlight icon is also displayed. The backlight will

reduce battery life by 30% so it’s best to turn it off when not

needed.

More Info

VDI

VDI stands for Visual Display Indi-

cator and is a numeric representation of

the target’s response. So-called VLF

detectors transmit a magnetic field

which is disrupted by nearby metal tar-

gets. The disruption is seen by the

receiver as an increase in signal ampli-

tude (which gives a basic “I found

something!”) but also creates a signal

phase shift. This phase shift usually

indicates the type of target and can be

used both for identifying targets and for

discriminating or rejecting them.

White’s uses a VDI scale of -95 to

+95, where negative numbers corre-

spond to ferrous (iron) targets and posi-

tive numbers to non-ferrous targets. A

chart of typical VDIs is shown on the

right.

There is a lot of overlap amongst tar-

gets. For example, due to the variety of

sizes and alloys, gold rings can give the

VDI SCALE

HOT ROCK

DOLLAR

HALF / LG

QUARTER

DIME

+95

ZN CENT

CENT

CU-NI CENT

PULL TAB

SQ TAB

NICKEL

FOIL IRON

SALT

NAILS

LG IRON

-10

-20

-95

SILVER RING

LATE CENT

-40

-60

-90

EARLY CENT

GOLD RING

$2.50 GOLD

$5 GOLD

SC CAP

SM NUGGET

LEAD

MINIE

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