Fisher CZ-7a PRO Quicksilver Operating Manual page 35

TARGET IDENTIFICATION
Keeping these four rules in mind, follow these steps for
accurate target identification.
tab. Gold nuggets, depending on their size and
shape, may fall into just about any category, the
smaller nuggets falling on the lower half of the
scale. So if you're not just looking for U.S. coins,
you should test some sample targets to determine
what level of discrimination you want to work at
and what targets you want to dig.
4) Your CZ-7a Pro will correctly identify most small
targets most of the time, but it can be foooed.
Large targets, uneven ground mineraiization, a
good target lying next to a bad target, deep
targets, all of these and more are sources of
error. Remember, the CZ-7a Pro is designed to ID.
small, coin size targets only, and even some of
these may be deep enough, bent, damaged, or
corroded enough to give a false signal.
1. Once you've located a target, pinpoint its
exact location as in the "Pinpointing' procedure
(see p. 24). Since accurate I.D. is dependent on
accurate pinpointing, it is recommended that
you press the SEARCH/PINPOINT pad rather than
try to pinpoint your target in either the Autotune
or Target I.D. mode.
2. Once you've pinpointed your target, release
the SEARCH/PINPOINT pad. If you're searching in
the Autotune mode, switch over to the I.D.
mode.
3. Move the coil just enough, left-right-left,
across the target to get a good signal. The LCD
marker should lock onto a target classification
which in turn will agree with the audio response
(high, medium or low tone).
4. If you no longer get a meter reading or audio
response once you've pinpointed the target,
you're over something that you've notched out
and the CZ-7a Pro is rejecting it.
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