24
TARGET IDENTIFICATION
the DISC setting you’ve chosen, and your CZ-20 is
rejecting it.
4. Once you’ve pinpointed your target and you’re
getting a good, consistent signal, you’ve identified
or at least classified your target. A low tone means
your target is probably ferrous. A mid tone indicates
a pull tab or foil, and the high tone indicates a U.S.
coin.
5. The DISC control provides increments of rejection
and identification within the mid- and high-tone
target classifications. Take a look at the target I.D.
decal on your control housing (or the chart on p.
15) to see what gets rejected at which DISC point.
6. If you’re getting a high-tone response for
example, you may well be over a U.S. coin. If you
want to know what kind of coin it is, advance the
DISC control to “5.” You know from the I.D. decal
that if you lose the signal your target is probably a
nickel (or something conductive and very similar).
If you don’t lose it, go up to “6.” If you lose it at “6,”
your target may well be a U.S. zinc penny. If you
still get a signal, your target, if it is indeed a coin,
will probably be a copper penny, an older silver
coin or a clad coin. Most other small targets will be
ignored.
7. The same is true of the mid-tone targets: Round
pull tabs are rejected at “2,” foil at “3” and
rectangular tabs at “4.” If, for example, you’re
looking for gold rings in an extremely trashy area,
you have the ability to reject at least some of the
trash say iron, round tabs and foil and still get those
rings falling into the rectangular tab and all coin
categories. (Of course you’ll have to dig
rectangular tabs as well.)
8. Your CZ-20 will correctly identify most of the
targets on your I.D. decal most of the time, but it
can be fooled. Large targets, uneven ground
mineralization, good targets lying next to bad
targets, deep targets, all of these and more are
