you're probably over a piece of metal. Move
away and try again.
2.
If you get a sudden bell tone that is not
preceded by an increasing audio response as
you lower the coil, you're probably in some very
highly mineralized soil or sand. In this case, it's
best to use the "Bobbing" method. paying
particular attention to the notes on p. 17.
3.
If you don't get any audio response, or just a
very faint tone as you rotate the GROUND
control from 10 all the way to 0, you're probably
in an area where there's very little ground
mineralization. Just leave the GROUND control at
10 and begin searching.
"Bobbing-the-Search-Coil" Ground Balance Method
1.
Set the detector as in the Turn-On procedure
on p. 9, making sure the AUTO/I. D. control is set
to AUTO. With your sensitivity set to 10, you should
be able to hear a slight "threshold" hum. Hold the
search coil parallel to the ground, about 6 inches
over the ground and at least 3 feet away from
any metal objects.
GROUND BALANCING
Ground balancing
your CZ-7a Pro using
the "bobbing"
method can be more
accurate than the
"pushbutton" method
described on the
opposite page.
However, it takes a
little more practice to
get it right. The
"bobbing" method is
accomplished while
your CZ-7a Pro is in
the Autotune mode.
19
