28 Garrett Metal Detectors
AT Max
™
29
Press and release the IRON AUDIO button to switch the Iron Audio
feature ON/OFF. When this feature is on the words "IRON AUDIO"
appear on the LCD (as shown in the illustration above). The Iron
Audio feature can be used in any of the
AT Max
's four modes. Its
functionality in the three Discrimination Modes versus the All
Metal Mode will be discussed separately.
Iron Audio Use in Discrimination Modes:
Scattered iron objects in the ground can mask good targets
and even create “ghost signals” that appear to be a good target.
Garrett’s selectable Iron Audio feature allows the user to hear
discriminated iron (normally silenced) in order to know the whole
picture of what is in the ground and avoid being tricked into
digging an undesired target.
Iron Audio helps the operator identify flat iron objects such
as bottle caps that would otherwise appear to be good targets.
With the use of Iron Audio, discriminated iron targets (normally
silent) will produce a Low-Tone ID. Using Iron Audio, an iron nail
Iron Audio
Iron Audio
is ON
IRON AUDIO
Button
produces several fast low tones as the searchcoil passes over,
while a bottle cap or steel washer produces a very distinctive Low-
High-Low response.
Refer to the illustrations below regarding the use of the Iron
Audio feature while in either Custom, Coins, or Zero Mode:
IRON AUDIO
OFF
: Normal division of low, mid and high tones in a Discrim Mode.
IRON AUDIO
OFF
: With Iron Discrimination set to 20, all targets below 20 are silent.
75
75
20
35
99
99
0
20
0
IRON AUDIO
ON
: Targets below 20 are now heard as a low tone and targets above
20 will produce a mid or high tone.
75
75
20
35
99
99
0
20
0
