Garrett GTI 2500, Руководство пользователя

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Graphic Target Imaging 2500 - 5
any degree because of ground conditions,
more precise manual ground balancing
may be required. You may also want to
use the Manual Ground Balance func-
tion to ground balance slightly positive
to enhance gold nugget detection or bal-
ance slightly negative to reduce "hot rock"
detection.
Use the MENU touchpad to display MANUAL
GROUND BAL on the screen. Raise and
lower your searchcoil and listen closely to
the audio signal. If the sound grows louder
as you lower the coil, press the (-) pad
several times.
Lift your searchcoil again and lower it to
operating height. If the sound level now
decreases, you have made too great a
negative adjustment. Press the (+) touch-
pad once or twice. Precise adjustment is
possible because there are 256 steps on
the manual ground balance of the GTI
2500 as reflected in the movement of
segments on the Upper and Lower Scales.
Don't hesitate to hold either touchpad
down to make large adjustments.