AND AT4 BEACH HUNTER OPERATING INSTRUCTIONS:
AT3 AND AT4 BEACH HUNTER




CONTROL FUNCTIONS

Depth: This control on the upper right has three functions:
Turning the instrument on and off;
Testing batteries; (See Battery Section)
Regulating detection depth.

Trash Elimination Controls:

Ferrous Range: Allows adjustment for the elimination of targets in the iron range up to but not
including aluminum pulltabs. Targets located in this range give an audio signal increase not
the Coin Alert audio signal.

Non-Ferrous Range: Allows adjustment for the elimination of targets in range of pulltabs
through aluminum screwcaps. All targets located and accepted in this range will give the Coin
Alert audio signal.

Pinpointing Push Button: Pressing this button selects the electronic zero motion pinpointing
mode. Press and hold for pinpointing. Release the button, and the detector automatically
returns to Trash Elimination Mode.



OPERATING INSTRUCTIONS


Initial Settings (): Your Master Hunter has initial setting points () located on the control
panel. By first rotating the controls to these points, you turn on the detector (with the Depth
knob) and adjust it for satisfactory operation. As you become more familiar with your Beach
Hunter, you may wish to make additional slight adjustments in relation to the targets you seek
and the ground over which you are searching.

Searching: Scan the searchcoil at a rate of about one to two feet per second. Maintain a one
to two-inch searchcoil height above the ground. Except for nails, foil or bottlecaps, all metal
targets you encounter that are within the Ferrous Range will cause the sound level of your
detector to increase. Targets in the Non-Ferrous Range other than pulltabs will produce the
Coin Alert belltone signal. Pinpoint and recover all targets that produce an increase in audio
signal volume or an audio Coin Alert.

Pinpointing: To use the Pinpointing function of your Beach Hunter to determine exact target
location, press the push button and hold. This activates the pinpointing mode while you scan
the area again. The detector will now give a more pronounced signal when the searchcoil is
held directly above or crisscrossed over the target.
Even more precise pinpointing can be obtained by placing the searchcoil directly on the
ground, then pressing and holding the button. Slide the coil, maintaining ground contact
across the target. This is pinpointing by detuning and is a valuable asset

Recovery: Now that you have located a target, you must usually dig to recover it. Inland, it is
recommended that a probe be used to help you determine your targets exact location.
Nevertheless, always make as small a hole as possible with your digging tool (a sand scoop is
generally favored in beach and surf environments). It is quicker, requires less work from you
and leaves a hole that is easier to fill. And, you should always fill your holes.

Target Elimination: Garretts Dual Discrimination System permits you to select the targets
you desire in both Ferrous and Non-Ferrous ranges. The Ferrous range is adjustable from
zero through bottlecap rejection, while the Non-Ferrous range takes over at pulltab rejection
and is adjustable through aluminum screwcaps. Proper use of the two controls will
dramatically improve accuracy in eliminating worthless targets in both the Ferrous and Non-
Ferrous ranges and in accepting the many kinds of gold and silver rings, jewelry and silver
gold coins.

Rejected Ferrous Target: Audio threshold maintained - no change in sound.
Accepted Ferrous Target: Normal increase of sound.
Rejected Non-Ferrous Target: Normal decrease of sound.
Accepted Non-Ferrous Target: Coin Alert Belltone.

As you adjust the controls for your desired levels of Accept/Reject, the four audio responses
will automatically adjust to ensure correct target identification.

Control Adjustments: You may find that slight adjustments to the Depth and Elimination
controls may be necessary. For example, you may wish to eliminate almost all trash from the
audio response, you get an audio signal from all coins. Adjust the lower Ferrous control to
reject small iron trash yet still accept nickels. Adjust the upper Non-Ferrous control to accept
all other coins.

More on Target Audio: When scanning an area, you can determine the probable identity of a
target by its sound. A normal audio response will signify that the target is most likely a nickel
or a small gold ring. When the audio response is the Belltone, the target is most likely any
other US coin, a larger gold ring or other highly conductive metal target. Depending upon the
elimination control settings, it is possible that some pulltabs may still give an audio response.

When a metallic object is accepted, the detectors headphone sound will increase from your
pre-selected audio threshold level. Some rejected targets, however, may cause the audio to
break up or sound erratic. This is generally a response to shallow trash targets and can be
remedied by raising the height of your searchcoil when scanning. Another indication of a
rejected target is an audio signal in one direction as you scan, and no response when
scanning from the other direction. Test typical trash items before operating your Beach
Hunter to determine what signal your detector will give on encountering them.


BATTERIES

AT3 Beach Hunter ONLY:

Battery Test: When the power is turned on, the #1 battery circuit is checked automatically and
audibly. Three beeps indicate that the batteries have a very good charge, two beeps indicate
an adequate charge, and one beep means the batteries should be replaced. Circuit #2 (the
audio battery) should be replaced when audio volume is no longer adequate.

Battery Replacement:
1. Release the clamps on each side of the detector.
2. Use the clamps as levers to remove the front panel.
3. Carefully remove the panel and chassis and disconnect the coil wire.
4. Check the color of the card on the desiccant pack. If the color is blue, the pack may be
reused. If it is pink, replace the pack with a new one. Dry the card for one hour at 200�F.
5. Access the batteries by loosening the battery hold-down clamp. Observing the correct
polarity, replace the batteries, then replace and finger-tighten the battery clamp.
6. Before reassembly, check and clean the rubber gasket. Use just enough silicon grease
(not spray) or petroleum jelly to lubricate the gasket.
7. When reassembling, be sure the coil is connected and that the panel seats smoothly over
the gasket.
8. Close latches and reinspect for proper panel
and
gasket seating.
9. Use only high-quality conventional or rechargeable batteries.
10. Recharge ONLY rechargeable batteries! NEVER try to recharge alkaline, carbon or other
non-rechargeable batteries. This will probably result in serious damage to your detector

AT4 Beach Hunter ONLY:

Your AT4 Beach Hunter was equipped with NiCad rechargeable batteries designed to be
recharged hundreds of times. You may also substitute other high-quality rechargeable or
conventional batteries, if you wish - Caution: Recharge ONLY rechargeable batteries!
NEVER try to recharge alkaline, carbon or other non-rechargeable batteries. This will probably
result in serious damage to your detector.

Battery Test: Each time your AT4 Beach Hunter is turned on, the batteries that power it are
checked automatically and audibly. Three tones indicate that the batteries have a very good
charge, two tones indicate an adequate charge, and a single tone means it is time to
recharge

the rechargeables or
replace
conventional batteries.

Rechargeable Batteries:
When rechargeables require recharging, attach the recharger to the same connector as the
headphones. This can be found below the Depth knob on the control panel. Observe the
following recommendations to help achieve maximum benefit of the batteries with which your
AT4 comes equipped.
Keep the batteries fully charged as much as possible.
Try to recharge rechargeables before using the detector.
Do not leave rechargeables for long periods in a discharged or partially discharged
condition. Remember that some rechargeable batteries can develop a set if they are used the same
amount of time between recharging; that is, if they are regularly recharged after only two
hours of use, they soon will take a charge for only two hours. Therefore, try to discharge
batteries a differing amount of time between charges.
At least every six months allow the batteries to discharge to a point where they fail to meet
the minimum battery test; then recharge for 24 hours.
Although manufacturers of rechargeable batteries report it impossible to overcharge them,
it is recommended that they not be recharged for more than 24 hours. Fifteen hours
generally assures a full charge.

Caution:
Recharge ONLY rechargeable batteries! NEVER try to recharge alkaline, carbon or other non-
rechargeable batteries. This will probably result in serious damage to your detector.

Conventional Batteries:
You can switch to conventional batteries from the rechargeables with which your AT4 came
equipped
at any time
. This can be done while you are hunting. You may choose to use
conventional batteries when you find they will enable y