12
Garrett Metal Detectors AT Max
™
13
Example: this is the preset notch discrimination pattern for COINS Mode.
The AT Max includes four detection modes: a true All Metal Mode
and three Discrimination Modes.
Press the MODE button to scroll through the four modes:
• ALL METAL Mode–Provides the greatest detection depth
and sensitivity. The All Metal mode offers a continuous audio
response to allow the operator to hear the subtle detection
signals produced by faint targets. The All Metal Mode contains no
discrimination, thus all types of metal will be detected.
• CUSTOM Mode–Can be programmed by the operator and
the AT Max will retain the changes when the detector is switched
off. The factory preset for the CUSTOM Mode is the same as the
COINS Mode. Begin with this discrimination pattern and then
use the NOTCH DISC (+) or (-) and ELIM buttons to customize the
mode. (For more information, see pages 18–19.)
• COINS Mode–Designed to find most types of coins and
eliminate common trash items such as iron, foil, and ring-style
pull-tabs. Some desirable items that respond the same as foil or
pull-tabs may be missed. Some digging of junk items is to be
expected, such as aluminum cans.
• ZERO Mode–Detects every type of metal. All 12
discrimination pixels are switched on and High-Res Iron Discrim
is set to 0 (zero)—indicating that no metals targets have been
notched out (eliminated). Use this mode to find all metal items
or when the material of the desired object is unknown. Switch to
the Zero-Disc Mode to aid in locating a target when its signal is
inconsistent. Such signals could mean a trash target is close to a
good target.
All Metal Mode vs Discrimination Modes
In any of the three Discrimination Modes (Custom, Coins, or
Zero), the AT Max provides more Tone ID information in addition
to the ability to discriminate unwanted trash targets (e.g. nails,
foil, pull-tabs). However, the three Discrimination Modes, by their
nature, are less sensitive to small and deep targets than the All
Metal Mode.
The All Metal Mode is ideal to use for maximum detection
depth in areas that are not overly trashy or where there is no
desire to eliminate any type of metal. The Discrimination Modes
are usually desired in trashy areas for the elimination of some
trash targets. The Discrimination Modes will provide quieter, more
stable operation, but will not detect as deeply as the All Metal
Mode.
In any of the modes, the AT Max's searchcoil must be in motion
to detect targets. Truly static detection is possible while using the
detector's Pinpoint pushbutton.
Selecting Modes (Discrimination Patterns)
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