User manual

64 - Garrett Metal Detectors
BENCH TESTING
This will enable you to test typical treasure
and trash items and to learn about your
GTI 2500 before taking it into the field or
trying to set discrimination. Tests should
be performed as shown with the searchcoil
perpendicular to a bench, floor or other
non-metallic surface and several feet away
from any large metallic object:
1. Select the All-Metal mode of operation.
Bring various metallic targets across the
bottom of the searchcoil at a distance of
about two inches. Each target will cause