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GROUND BALANCING
7
.
Notice that the position of the KNOB affects
7
.
the sound relative to the coil's direction:
a
.
If you hear a louder sound as the
a
.
searchcoil is lowered toward the ground,
we call this positive response.
b
.
If you hear a louder sound as the
b
.
searchcoil is lifted away from the ground, we
call this negative response.
8
.
Rotate the knob both clockwise and
8
.
counterclockwise while pumping
the coil and notice the KNOB
position where the sound
changes from negative
response to positive response.
9
.
Set the KNOB at the position
9
.
where you achieve a slight
positive response.
i.e. the sound is slightly
louder as the coil is
lowered toward the
ground.
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You may also use the following, simpler method, to ground balance.
While not as accurate as the coil-pumping method in AutoTune, it
yields an approximate ground balance setting.
Find a patch of ground free of metal
1
)
1
)
Set the ground-balance knob at the pre-set position, 100%
clockwise.
2
)
2
)
Position the searchcoil about 6" over the ground.
3
)
3
)
Press PINPOINT button
4
)
4
)
Lower searchcoil to within 1" of the ground. Sound will get louder.
5
)
5
)
Rotate knob slowly counterclockwise until detector is just silent.
6
)
6
)
Rotate knob back slightly clockwise until you hear a low volume
sound. At this low-volume setting, the detector is approximately
ground balanced.
:
cannot ground balance over a metal object.
:
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(continued)
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