Iron Audio - Garrett AT Pro INTERNATIONAL Owner's Manual

Example: Detecting Targets in Trash with High-Res Iron Discrimination
In the illustration above, the AT Pro is operating with an IRON DISC setting of
20. The nail seen in Illustration 1 (on page 25) registers from 10 to 25 on the
Digital Target ID scale. To eliminate the nail from detection, increase the iron
discrimination level to 25 using the IRON DISC (+) pushbutton.
In Illustration 2, the same iron nail is laying above a good coin target. Since
the Iron discrimination level is set to 25, the nail by itself would not be
detected; however, the two objects have a combined conductivity of more
than 25.
Therefore, the good target is detected due to the combined conductivity
being higher than that of the discriminated target (nail) alone.
26 Garrett Metal Detectors

IRON AUDIO

Iron Audio
ON
IRON
AUDIO
Pushbutton
Press and release the IRON AUDIO pushbutton 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
Pro's six 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 and avoid being tricked into digging
an undesired target.
Iron Audio also allows adjustment of the mid-tone's range
to include all targets above the iron discrimination setting.
The user is adjusting the cut-off between low-tone iron targets
and mid-tone targets to better distinguish good targets.
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AT Pro International™