Pushbutton - Fisher M-Scope CZ-20 QuickSilver Operating Manual

GROUND BALANCING

PUSHBUTTON

This will probably be your method of choice in all but the most
difficult of ground conditions. It's fast, easy and accurate. You
can use this method in either the Autotune or Target-I.D. mode.
1. With your controls set as in the "Turn-On" procedure
(GROUND control at "10"), hold your search coil
parallel to and 6 to12 inches off the ground. Make
sure you're at least 3 feet away from any metal
objects.
2. Press the PINPOINT button as you lower the coil to
the ground. Keep your thumb on the PINPOINT
button, and starting at "10," rotate the GROUND
control clockwise until you hear an audio tone.
Then back off to the exact point where the tone
disappears. Release the PINPOINT button and
you're ready to search.
3. Always ground balance your CZ-20 in the areas you
intend to search, whether it's on land or
underwater.
NOTES:
1. If you get an audio response as you first lower the coil with
the GROUND control at "10," you're probably over a piece
of metal. Move 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.
3. If you don't get any audio response, or just a very faint one
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.
FALSE SIGNALS
A "false signal" occurs when a target is incorrectly identified.
For example , a small, broken-off piece of pull tab may be
identified as a nickel. Or a small, deep coin, especially in
mineralized soil, may read "IRON." The more sensitive the metal
detector, the harder it is not to have false signals. Your CZ-20 is
an extremely sensitive machine, so you're bound to encounter
them. Here are some of the most frequent sources of false signals
and what to do about them:
1. Trash: The most common source of false signals.
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Large or irregular pieces of trash may give good,
consistent, high-tone signals. In this case you'll
usually have to dig the target, but with experience
you'll be able to eliminate many of the large targets
whose size will be obvious when you go into the
pinpoint mode. Another false signal response may
be a "one-way" or disappearing signal. You'll
sweep over the target and get a good signal but
nothing on the return sweep. When this happens
you're over a target that the CZ-20 can't positively
identify due to its size, shape, depth or alloy. The
CZ-20 may I.D. it as a coin when swept from one
direction and iron on the return sweep.
If your DISC control is set at "0" you'll hear first a
high tone (coin) and then a low tone (iron). Or if
your DISC control is set higher, to reject iron, you'll
hear the high tone sweeping one way and nothing
the other way.
Quite often the signal will just disappear and you
won't be able to find it no matter which direction
you sweep. These one-way and disappearing
signals are usually trash, and as a general rule you
should ignore them. If you have any doubts, press
the PINPOINT button to get an accurate location,
and then I.D. the target. If you get a good
repeatable tone, dig it. If you still get a one-way
signal or it disappears, move on. Also, if your
pinpointing location is different than your I.D.
location, your target is probably a piece of iron.
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