16
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
tabs, nails and foil on the ground at least 18 inches
apart. Include some large targets as well: jar lids, soda
cans, etc.
2.
Set the DISC control at “0,” SENS at “5.” Adjust the
VOLUME control for a comfortable level when you
are over a large target.
3.
Ground balance the CZ-21 as in the “Ground
Balance” procedure.
4.
Hold the search coil about 2 inches above and
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.
5.
Note the different audio responses over the various
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.
6.
Note that an elongated ferrous object such as a nail
will give you a double “beep” as you cross it from end
to end, or a single “beep” if you cross its center.
7.
The signal from a large or shallow target will overload
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.
SEARCH MODES
25
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.
10.
Here’s a quick and easy way to tell the difference
between a small, shallow piece of foil and a gold
ring (or other possibly good target) without digging:
If you get a good solid “FOIL” I.D., set the search
coil down close to the target and then whip it
rapidly across the target just once with what can
best be described as a flick of the wrist. lf the target
disappears, it’s probably a small, shallow piece of
foil. If not dig it up it could be that gold ring you’re
looking for. Practice this over some foil until you get
the hang of it.
11.
Don’t be afraid to turn your sensitivity down. True,
the higher the sensitivity, the deeper your CZ-21 will
go, and the more you’ll find. But that’s only under
optimum conditions. If you’re getting a lot of false
signals caused by electrical interference, ground
mineralization or dense trash, lower your sensitivity.
If you have to back it down to “4,” “3” or even
“2” to eliminate the falsing, do it. That’s what your
SENSITIVITY control is for. You’ll be surprised at how
much you might find in an area that would otherwise
be unsearchable at high sensitivity levels.
12.
Set your discrimination at an appropriate level. If
there’s very little trash in the area, set it low, say
at iron discrimination, and dig every good signal.
If there is a lot of trash present and you’re mainly
interested in coins, set the discrimination level high.
You may even want to sacrifice nickels and zinc
pennies in extremely trashy areas. If you’re looking
for gold rings, relics, artifacts, or small ancient coins,
you’ll have to set your discrimination level low. The
best way to find out how low is to bury some sample
targets or just dig everything for awhile until you get
TARGET IDENTIFICATION
