Audio Response Chart - Fisher CZ-7a PRO Quicksilver Operating Manual

SEARCH MODES
Audio Response Chart: CZ-7a Pro 3-Tone, Target-LD.
Low Tone
Nails, wire and
other iron
trash
In addition to visual target identification, the CZ-7a Pro has 3-tone, audio target ID.
A low tone is for iron, a medium tone Is for pull tabs and foil and a high tone is for
coins. A fourth tone, which sounds like a telephone, alerts you to large, shallow
targets that are usually (but not always!) trash.
LCD in Notch mode
with cursor below IRON
icon and the IRON
category rejected
9. When you go over a large, shallow target, the
CZ-7a Pro will respond with a distinctive bell tone.
This is because metal detectors can only identify
small targets. What usually happens is the
detector circuits overload and identify a large
target as "good" (silver, coin, etc.). Your CZ-7a
Pro, however, will alert you to a target that's big
and shallow and cannot be accurately
identified. (Big deep targets, however, will
usually be classified as a coin. Also be aware that
large coins on the surface may set off the bell
tone. And the optional, smaller 5-inch coil is more
likely to overload than the standard 8-inch coil.)
Medium Tone
Round pull tabs,
rectangular pull
tabs. foil and
most gold rings
10. Now, using the NOTCH and Arrow touch pads,
reject the IRON category by removing the
marker from below the IRON icon. You will find
that the CZ-7a Pro rejects small iron targets and
no longer responds either with an audio tone or
a display identification.
High Tone
Copper pennies,
zinc pennies,
nickels. dimes,
quarters and a
few gold rings
Bell Tone
Soda and beer
cans, pipes and
other large,
shallow targets
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