Target I.d - Fisher Labs CZ-21 QuickSilver Operating Manual

SEARCH MODES
TARGET I.D. MODE
When the DISC control is set in the 0-6 positions, the CZ-21 has
the ability to identify many types of small targets and, depending
on the discrimination level, reject or ignore most of them. To better
understand just how your CZ-21 responds to different targets, try
the following:
1. Scatter some sample targets such as coins, rings, pull
2. Set the DISC control at "0," SENS at "5." Adjust the
3. Ground balance the CZ-21 as in the "Ground
4. Hold the search coil about 2 inches above and
5. Note the different audio responses over the various
6. Note that an elongated ferrous object such as a nail
7. The signal from a large or shallow target will overload
16
tabs, nails and foil on the ground at least 18 inches
apart. Include some large targets as well: jar lids, soda
cans, etc.
VOLUME control for a comfortable level when you
are over a large target.
Balance" procedure.
parallel to the ground and move it slowly back and
forth across each sample. Remember, the coil must
be in motion to get a response. Keep in mind that
for accurate target I.D., the coil center must pass
directly over the target.
targets. Your CZ-21 will respond with a low tone over
most iron or steel targets. Pull tabs and foil will give a
medium-tone response. U.S. coins give a high tone
response.
will give you a double "beep" as you cross it from end
to end, or a single "beep" if you cross its center.
the circuit, making target identification impossible.
The CZ21 indicates this condition with a distinctive
bell tone. The overload will not harm the detector;
the signal is just too strong for interpretation. If you
hear the bell tone, indicating overload, move the
searchcoil away from the target. Sweeping at
a greater distance may allow for proper target
identification.