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OPERATION and CONTROLS
cont.
MENU SELECTIONS
1. SENSITIVITY
Use
and
to increase or decrease sensitivity while the SENSITIVITY
line is highlighted.
Maximum sensitivity setting is 99.
Minimum sensitivity setting is 05.
If the detector beeps erratically or beeps when there are no metal objects
being detected, reduce the sensitivity.
The searchcoil produces a magnetic field and then detects changes in that
magnetic field caused by the presence of metal objects. This magnetic field
that the detector creates is also susceptible to the electromagnetic energy
produced by other electronic devices. Power lines, microwave ovens, lighting
fixtures, TVs, computers, motors, etc.... all produce EMI which can interfere
with the detector and cause it to beep when no metal is present, and
sometimes to beep erratically.
Notice that the sensitivity settings behave differently above 90. From 05 to 90,
gain is changing. Above 90, the threshold level changes. Setting above 94 will
be noisy or sound erratic.
HOW DEEP WILL IT GO?
The Gamma 6000 Metal Detector will detect a coin-sized object, like a quarter,
to a distance of about 11" (28cm) from the searchcoil at maximum sensitivity.
Large metal objects can be detected to a depth of several feet. Detectability
is directly related to the size of the metal object -- the larger the object, the
deeper it can be detected.
Accuracy of target identification is also related to distance from the coil.
Beyond a distance of 8", the accuracy of target identification begins to
diminish.
All modes share the same sensitivity setting. If sensitivity is adjusted in any
mode, the change is also effective for the other modes.
11
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