Garrett Metal Detectors Metal Detector GTI 1500 - Manual (Page 43)

First Method: While in the OPERATE mode
press the + and - touch pads to position the
blinking cursor above the Discrimination
Segment corresponding to the particular
target to be detected or ignored.
If the segment is turned on (showing),
that target will be signaled audibly. If you
wish to reject that type target, press the
ACCEPT/REJECT touch pad. The segment
will be turned off and disappear, creating a
"reject notch." If the Lower Scale segment
is not showing, press the ACCEPT/REJECT
touch pad to turn it on, creating an "accept
notch," and your GTI will sound off on
targets represented by that segment. The
OPERATE pad must also be pressed after
notches have been set.
Second Method: Pass the searchcoil over
an object to be accepted or rejected as a
target or pass the particular target across
the face (bottom) of the coil about two
inches away. Check to make certain of
the location of the target cursor on the
Upper Scale. If the segment below is not
showing, press ACCEPT/REJECT to turn it
Graphic Target Imaging 1500 -