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Graphic Target Proling 1350
™
BENCH TESTING
Bench testing enables you to test typical trash items
and learn about the discrimination capabilities of the
GTP 1350 before taking it into the field or attempting
to alter the Discrimination settings. The following
tests should be performed as shown below with the
searchcoil perpendicular to a bench, floor or other
non metallic object.
1. Select the ZERO Discrimination Mode.
2. Pass various metallic objects across the
bottom of the searchcoil at a distance of about
two inches. Each target will cause the sound
to increase, which represents true,
non-discriminating operation.
3. Select the COINS Mode.
4. Press the OPERATE touchpad
5. Pass the same metallic targets (as used in 2)
across the bottom of the searchcoil and listen