11
“BOBBING” THE SEARCH COIL METHOD
This method takes a little more practice, but you may find it
slightly more accurate with fewer false signals from ground
minerals.
1.
Set as in the “Turn-On” procedure, making sure the
DISC control is at AUTOTUNE and the SENSITIVITY control
is set so you can just barely hear a threshold hum.
Hold the search coil parallel to and 6 to 12 inches
over the ground and at least three feet away from
any metal objects.
Do not use the PINPOINT button
during any part of this procedure.
2.
Lower the coil to an inch or two above the ground
and then quickly raise it. Note that as you lower the
coil, the tone disappears, then gets louder as you raise
it and finally returns to normal when you stop it 6 to 12
inches above the ground.
Conversely, if you set the GROUND control to 1, the
threshold hum will get louder as you lower the coil and
disappear when you raise it.
3.
Your objective now is to adjust the GROUND control so
that there is no change, or only a minimum change
in the threshold hum, as you move the coil up and
down. Start by lowering the GROUND control to 9.
Lower the coil and raise it again. One of three things
will happen to your theshold hum:
a)
It will fade again as you lower the coil and increase
as you raise it. Continue to lower the ground
balance setting in
small increments until the
threshold hum remains the same (or changes
very little) as the coil is lowered and raised.
b)
It will get louder as you lower the coil and go silent
as you raise it.
c)
The hum will remain the same, or if it changes slightly,
the change is the same whether you lower or raise
the coil. Your CZ-5 is properly ground balanced, and
you are ready to begin your search.
You have gone
past the correct ground balance setting.
Increase the ground balance level (rotating the
control counterclockwise) in small increments
Summary of Contents for M-Scope CZ-5 Quicksilver
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