Garrett AT Pro Manual de usuario

1881 W. State Street

Garland, Texas 75042

Tel: 1.972.494.6151

Email: [email protected]

Fax: 1.972.494.1881

AT PRO Owner’s Manual

Owner’s Manual

e powerful, all-terrain solution for locating

deeply buried relics, coins and jewelry!

AT Pro™ 1

THANK YOU FOR CHOOSING

GARRETT METAL DETECTORS!

Congratulations on the purchase of your new Garrett

AT Pro™metal detector. This enhanced metal detector

has been specifically designed for use in more challenging

environments such as mineralized grounds and iron-cluttered

relic and coin hunting areas.

The AT Pro includes Garrett's exclusive Target ID technology

and patented discrimination features. Two indicator scales

allow you to see the detector’s discrimination setting (Lower

Scale) as well as the analysis of each target (Upper Scale).

In addition, a Digital Target ID scale provides a more specific

target value. The AT Pro also features High Resolution Iron

Discrimination (40 points) for separating desirable targets

from iron junk in cluttered areas, several advanced audio

features and a standard 8.5" x 11" elliptical Double-D

searchcoil engineered for optimum performance in more

challenging mineralized soils. In addition, the AT Pro can be

operated in a very user-friendly Standard (STD) Mode or in a

more advanced PRO Mode for experienced hunters.

Backed by more than 45 years of extensive research

and development, your Garrett AT Pro metal detector is

the most advanced of its kind in the industry. Whether you

are experienced or a beginner, this machine is well suited

for a wide variety of detecting environments. The AT Pro's

advanced features are designed for the expert treasure

hunter but its Standard Mode can be easily operated by the

beginner.

In order to take full advantage of the special features and

functions of the AT Pro, you are urged to carefully read this

instruction manual in its entirety.

2Garrett Metal Detectors AT Pro™ 3

TABLE OF CONTENTS

AT Pro CONTROL PANEL ................................................................... 4

QUICK START GUIDE........................................................................... 5

AT Pro COMPONENTS....................................................................... 6

LIST OF PARTS.................................................................................... 7

ASSEMBLY .......................................................................................... 8

POWERING ON.................................................................................. 11

SEARCH MODES...............................................................................12

Overview of STD Mode vs PRO Mode........................................12

Standard (STD) Detection Modes.............................................. 13

PRO Detection Modes................................................................ 15

Proportional Audio (PRO Mode)................................................. 15

Tone Roll Audio (PRO Mode)...................................................... 18

TARGET ID INFORMATION ................................................................ 19

DIGITAL TARGET ID...........................................................................20

TONE ID............................................................................................. 21

DISCRIMINATION ..............................................................................22

Notch Discrimination..................................................................22

Iron Discrimination..................................................................... 24

IRON AUDIO ...................................................................................... 27

SENSITIVITY......................................................................................30

GROUND BALANCE........................................................................... 31

Automatic Ground Balance........................................................ 31

Manual Ground Balance............................................................32

FREQUENCY ADJUSTMENT ..............................................................33

PINPOINTING ....................................................................................34

Narrowing the Detection Area ...................................................36

Coin Depth Indicator ..................................................................36

Alternative Pinpointing Methods ............................................... 37

HUNTING TIPS ..................................................................................39

BENCH TESTS...................................................................................44

UNDERWATER OPERATION .............................................................. 47

CARE AND MAINTENANCE............................................................... 48

Battery Replacement .................................................................48

TROUBLESHOOTING GUIDE.............................................................50

METAL DETECTING CODE OF ETHICS ............................................. 51

CAUTIONS .........................................................................................52

WARRANTY / SERVICE .....................................................................53

ACCESSORIES...................................................................................54

SUGGESTED READING.....................................................................56

4Garrett Metal Detectors AT Pro™ 5

AT Pro CONTROL PANEL QUICk START GUIDE

1. Install batteries.

The AT Pro operates with four (4) AA batteries which are

already installed by Garrett.

2. Power ON.

Press and release the ON / OFF Power button. The AT Pro

powers on in the last mode used and is ready to search.

(Factory default mode is Coins.)

3. Select Mode.

Use the Mode Pushbutton to select a different detection

mode, when desired.

4. Adjust settings.

Adjust Sensitivity or Discrimination settings, if desired.

5. Begin scanning.

Lower the searchcoil to 1 to 2 inches above the ground and

scan the coil left and right at approximately 3ft/second.

Battery Level

Indicator

ELIM and NOTCH DISC

Pushbuttons

Use NOTCH DISC (+) or (-) to select

a cursor. Then use ELIM button to set

its discrimination on or off.

SENSITIVITY

Pushbutton

increases or decreases sensitivity.

ON / OFF Power: hold 1 second

to turn power on/off.

MODE: push quickly to toggle

between detection modes.

RESET: hold 5 seconds to restore

factory settings.

Coin Depth

Indicator

indicates depth of

coin-sized target.

Mode

Indicator

Target ID

Legend

indicates

metal types. Lower Scale

indicates notch

discrimination pattern.

Target ID

Cursor

indicates

probable

target identity.

Digital

Target ID

(also shows

ground balance

settings while in

GND-BAL mode.)

PINPOINT /

Frequency

Adjust

Pushbutton

Press and hold to

pinpoint or use with

SENSITIVITY (+)

or (-) to change

frequency.

Sensitivity

Setting

High Resolution

Iron Discrimination

indicates level of iron

discrimination selected.

Iron Disc

Pushbutton

Use (+) or (-) to change

iron discrimination

level.

Iron Audio

Use to hear

discriminated

iron.

GROUND BALANCE

Pushbutton

Press and hold for fast auto

ground balance or use with

NOTCH DISC (+) or (-) for

manual ground balance.

One (1) control housing with

S-shaped stem

One (1) upper stem and one

(1) lower stem connected,

with camlock fasteners

One (1) wing nut, two (2)

mounting washers and

one (1) threaded bolt

One (1) 8.5" x 11" DD

searchcoil

Owner's manual

Warranty Card

Headphones

6Garrett Metal Detectors AT Pro™ 7

AT Pro COMPONENTS













Control

Housing

S-shaped

Stem

Upper

Stem

Lower

Stem

coil

Handle

Grip

Padded

Arm Cuff

LCD

Screen

Detector

Stand

Pushbutton

Controls

Arm

strap

Camlocks

LIST OF PARTS

No tools are required to assemble the AT Pro. Four (4) AA

batteries are included with the detector. The box for your

detector contains the following parts:



If any part is missing, please contact your local dealer.

ASSEMBLY

8Garrett Metal Detectors AT Pro™ 9

1. Holding the upper and lower stem assembly in front of you (as

shown below), twist camlock to the right (clockwise) to loosen.

2. Slide lower stem out to engage spring clips in upper stem holes.

3. Align the holes in the mounting washers with the small posts on

the lower stem and press firmly into place.

4. Slide the searchcoil onto the stem.

5. Insert the threaded bolt through the holes of the lower stem and

searchcoil. Hand-tighten searchcoil assembly with the wing nut.

6. Holding assembly as shown, loosen camlock at the end of the

upper shaft by turning counter-clockwise.

Note: If the camlock collar slides off during loosening, simply

slide it back on and tighten slightly.

1. 2. 3.

4. 5. 6.

7. Depress the spring clip in the S-stem (containing control housing)

and insert S-stem through the upper camlock collar into the

upper stem.

8. The spring clip must be engaged in the FIRST stem opening in

order to maintain battery compartment access. Hand-tighten

the camlock collar. Do not overtighten!

9. Depress the spring clip in the lower stem and adjust to the most

comfortable operating length. Hand-tighten the lower stem

camlock collar. Do not overtighten!

10. Wrap the cable snugly about the stem with the first turn of the

cable over the stem.

11. Insert the coil connector into the 4-pin connector of the control

housing and hand-tighten. After lining up the connector

pins, press the connector in firmly, yet carefully, until the O-ring

is felt to be fully inserted.

Note: If the O-ring is properly

seated, the connector's collar

can be easily tightened; if the

collar is difficult to turn, the

O-ring may not be seated

properly.

7. 8. 1st pin position

9. 10.

11.

10 Garrett Metal Detectors AT Pro™ 11

POWERING ON

Switch the detector on with the power button.

Press and release to switch the unit ON and resume hunting

with the same settings used prior to switching the unit OFF.

To turn off the detector, press and hold this pushbutton for

one (1) second (until the detector produces a second beep).

To restore the factory settings, press and hold the power

button for 5 to 10 seconds (until the detector produces a fast

double beep).

ON/OFF Power

and MODE

Pushbutton

12. If needed, adjust the arm cuff by removing the screw on the

bottom. Move the two-piece cuff to the other hole, reinsert the

screw through the headphone cable clip, and tighten.

12.

13. If desired, attach headphones to the 2-pin connector of the

Control Housing. After lining up the connector pins, press the

connector in firmly, yet carefully, until the O-ring is felt to be

fully inserted.

14. Secure the headphone cable under the detector's arm cuff by

pressing the cable into the headphone cable clip.

Note: Headphones are not required but are desired by many

hunters to hear faint targets. Connecting the headphones will

silence the detector's speaker.

Note: The provided headphones are for dry use only; see page

55 for optional waterproof headphones.

13.

14.

12 Garrett Metal Detectors AT Pro™ 13

SEARCH MODES

The AT Pro includes six detection modes: three Standard

(STD) Modes and three Professional (PRO) Modes. It is

recommended to begin searching with one of the Standard

Modes to become familiar with the AT Pro before switching

to the more advanced audio features provided by the Pro

Modes.

Tap the Mode button to scroll through the six modes:

the modes are Custom, Coins or Zero in the STD Mode and

Custom, Coins or Zero in the PRO Mode.

•OverviewofSTDModevsPROMode

In its Standard (STD) Mode, the AT Pro provides a full-

strength audio response regardless of a target’s amplitude.

Many detectorists prefer this consistent, unambiguous, binary

(either on or off) target response. The AT Pro's Standard Mode

operates in this clean, binary response format in which the

target's dominant conductivity is reported by a single tone.

This mode offers "quieter" or more stable operation and is

preferred by many beginners.

For those who want to hear more target information,

Garrett offers a Pro Mode. The benefits of operating in Pro

Mode include the ability to hear a target's size and depth via

the Proportional Audio and conductivity changes via Tone

Roll Audio. Pro Mode also offers faster recovery speed for

separating adjacent targets. The advanced audio features of

Pro Mode are intended for more skilled users who wish to

hear the true signature of targets versus the simpler target

response provided in STD Mode.

• ZERO Mode

Designed to detect every type of metal; use

ZERO mode to find all metal items or when the

material of the desired object is unknown. All 12

discrimination pixels are switched on and High-Res

Iron Discrimination is set to 0 (zero)—indicating that

no metal targets have been eliminated.

Switch to the ZERO Mode to aid in locating a

target when its signal is inconsistent. Such signals

could mean the target is made of iron or a trash

target is close to a good target.

STANDARD (STD) DETECTION MODES

In the STD modes, the AT Pro produces a full-strength

binary audio beep to indicate a detected target. Standard

detection mode operation is ideal for learning the AT Pro

because of its consistent audio signals. Detected targets

are heard at the same full-strength beep regardless of their

size or depth.

Three discrimination patterns are available in the

Standard Mode: Zero, Coins or Custom.

Note: These three discrimination patterns are the same

in either Standard or Pro modes.

14 Garrett Metal Detectors AT Pro™ 15

•COINS Mode

Designed to find most types of coins, jewelry, etc.,

while eliminating trash items such as iron and foil.

High-Res Iron Discrimination level has been preset

to 35 to exclude most iron targets. In addition,

one pixel of foil and two pixels in the pulltab range

have been excluded. Be aware that most pulltabs

and pieces of tabs have not been eliminated from

detection as these trash items have conductivities

similar to small coins and jewelry.

•CUSTOMMode

This mode can be customized by the operator and

the AT Pro will retain the changes when the detector

is switched off. The factory preset for the CUSTOM

Mode is the same as the COINS Mode (see above).

Begin with this discrimination pattern and then

use IRON DISC and NOTCH DISC pushbuttons to

customize the discrimination settings.

Note: Changes made to the ZERO or COINS modes

will not be retained after the detector is switched

off. (For information on the use of IRON DISC and NOTCH

DISC, see pages 22–26.)

PRO DETECTION MODES

Zero, Coins or Custom have the same discrimination

patterns as in STD Mode. In PRO Mode, however, the AT Pro

utilizes its Pro Audio functions—including Proportional Audio

and Tone Roll Audio—to offer more target information.

The Pro Mode audio provides more target information and

faster recovery speed for separating adjacent targets. This

is especially important in areas where good targets may be

scattered amongst iron trash.

Pro Mode audio by its nature creates more audible chatter

than Standard Mode. This is normal because of the additional

sensitivity of Pro Mode. The audio depth can exceed Target ID

depth in Pro Mode so it is possible to hear deep targets that

do not register a Target ID.

Proportional Audio (Pro Mode)

Proportional audio response means that the loudness

of the target's response is proportional to a target's signal

strength. This allows the user to hear subtle changes in a

target’s response. Proportional audio response also allows

the user to better judge a target’s size, shape and depth

and has the additional benefit of faster recovery time for

separating adjacent targets.

16 Garrett Metal Detectors AT Pro™ 17

Adjacent targets

Adjacent Targets Comparison: Standard vs Pro Mode

These two adjacent coins would produce one strong signal while in STD Mode.

In PRO Mode, the proportional audio provides two peaks of audio response to

allow the user to identify multiple targets.

Shallow coin

Audio Target Response Comparison: Standard vs Pro Mode

Notice the differences in Standard binary audio versus PRO audio in the two

target scenarios above. The binary audio gives a solid, consistent beep for

both the shallow and the deep coin. In contrast, PRO Mode's proportional

audio provides a stronger signal for the shallow coin and a softer signal for

the deeper coin. The actual profile, or signature, of the target’s response is

heard, thereby providing more information.

Deep coin

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