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Instruction Manual
Experienced operators detecting in wet sand at the beach should set the
Sensitivity control out of Auto and into the area marked Beach or as far
anti-clockwise as possible, with minimal false signalling. In general, the
more moist the beach sand, the more clockwise the knob must be turned.
The incidence of false signalling is minimised if the operator
concentrates on sweeping the coil as parallel and even to the beach
sand surface as possible, whether in or out of the water. In summary, for
greatest detection depth:
•
Keep the coil sweep as parallel to the beach sand as possible.
•
Turn the sensitivity knob as anti-clockwise as possible,
(within the manual region) so that minimal false signals occurs.
•
This setting will need to be altered, depending on the sand
moisture level.
Advanced users operating inland can operate the unit in either Auto or in
Manual. In more mineralised soils Auto is recommended. Note that "hot
rocks", "Roman Pennies" or some ancient red/orange/brown pottery or
tiles may cause the unit to respond as if the targets are ferrous. This
is not a false signal but the correct response, and indicates that the unit
is set at a relatively high sensitivity.
Advanced users operating in non-mineralised soils or areas of high trash
concentration should set the sensitivity control out of Auto and into the
variable Manual region. The requirements of this setting are the same as
those for the advanced beach detection. The control should be set as
anti-clockwise as possible (out of Auto and into the variable manual
region), so that minimal false signalling occurs. This setting will depend
on the degree of soil mineralisation and metal junk concentration.
7.4
Threshold Control
P0249-B
Located at the bottom left of the control panel, the
Threshold control allows for adjustment of the
background threshold level. This background
"threshold" or "hum" aids in the location of targets.
Small or large deep targets may not produce a
distinct target signal but rather cause only a slight
change in the threshold tone.
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