10
1
2
5
3
4
CONTROL PANEL
1. VOLUME/OFF:
Power on-off and volume control.
Volume is gradually increased from 1-5 settings. From
5-10, loud-target response is held constant while faint
targets continue to get louder.
2.
DISC:
In the 0-6 positions, the CZ-21 is in the target I.D.
mode, which is a silent, no-threshold, motion-discrimination
mode of operation with the ability to identify and then
ignore (“reject”) or accept many kinds of small metal
targets. In the AUTOTUNE position, the CZ-21 is in an all-
metal mode. In this mode, the CZ-21 has a slightly wider
and deeper search pattern, however, it lacks the ability
to discriminate or identify and reject targets.
3. GROUND:
Used to electronically cancel the effects of
ground mineralization. Proper use of this control will
minimize false ground signals and ensure that the CZ-21
is operating at its maximum potential in just about any
ground condition including wet ocean sand.
4.
SENS (Sensitivity)/BATT TEST:
SENSITIVITY: The higher the setting, the more sensitive
the detector. Start at lower sensitivity setting until you
gain experience with the detector.
l
is the suggested
default setting for salt water hunting.
p
is suggested
for fresh water.
BATT TEST: To test batteries
1. Reduce volume to low level
2. Put on headphones
3. Rotate SENS knob to BATT TEST position
4. Rotate VOLUME knob to increase volume
As you rotate to “10” the volume and tone will indicate
Figure 7.
Control Panel
31
FALSE SIGNALS
6.
Wet Salt Water Sand:
Your CZ-21 should be able to
handle most wet sand easily unless it’s black. See
Black Sand above. You should able to reduce the
number of false signals caused by salt water by
lowering your sensitivity and making sure you are
ground balanced properly.
7.
Hot Rocks:
Some rocks, by virtue of their high mineral
content, will be seen by metal detectors as a metal
target. In the Autotune mode, the CZ-21 will respond
to most hot rocks. Prospectors must learn to distinguish
between hot rock and nugget sounds. In the
target I.D. mode, certain types of hot rocks will be
automatically rejected at DISC = “0” and virtually all
other hot rocks will be identified as iron or rejected
at DISC = “1.”
8.
“End of Swing:”
Silent search motion detectors often
give false signals at the edges of the search pattern,
just as the coil stops and begins accelerating back
toward the operator. If this is a problem, try one or
more of the following:
a)
Keep your sweep smooth, slow and low to the
ground.
b)
Check your ground balance.
c)
Lower your sensitivity.
d)
Make sure your search coil is properly secured
and the cable connector is firmly tightened.
9.
Digging Tool:
If you’re carrying a metal sand scoop,
digging knife, or screwdriver, hold it behind your back
or keep it above your waist. Your CZ-21 is sensitive
enough to sound off each time you sweep the coil
beneath it.
10. Elongated Ferrous Objects:
If you get two beeps
close together and can’t find either target, you may
be near a nail or some other long, ferrous object.
Fortunately, in most cases your CZ-21 will identify
these objects correctly. In all cases, the target will be
between the beeps, or if you sweep at right angles
