29
FALSE SIGNALS
6. WET SALT WATER SAND: Your CZ-5 should be able to
handle most wet sand easily unless it’s black (see
BLACK SAND above). Chances are, if you’re having
trouble in wet sand, you forgot to switch your mode
switch to SALT and re-ground balance when you
moved from dry to wet sand.
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-5 will respond to most
hot rocks. Prospectors (who will most likely be using
the Autotune mode in an area where hot rocks
abound), however, will 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
Coin lying at an
angle or on edge.
Long ferrous object
(nail).
Large deep target
(water pipe).
?
Figure 8. Targets
that aren’t there.
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