F3 Operations Manual
29
b. Audio Reset. Whenever the Threshold Tone sounds louder
than normal perform Audio Reset.
NOTE
The detector cannot be used for clearing operations during the
Audio Reset procedure.
Audio Reset should be carried out whenever the threshold
volume seems louder than normal.
Hold the coil at least 600mm (24ins) off the ground and away
from any metallic objects.
Press and immediately release
the Ground Balance button
(Green Button located on top of the Handle -if the button is held
too long, the detector will begin to Ground Balance).
Figure 20: Audio Reset
Within two seconds the threshold tone will return to its correct
level.
c. Once Noise Cancel or Audio Reset is complete, continue with
steps 2 and 3. Figure 21 illustrates this sequence. Once
completed, the F3 can now be used for demining operations in
compliance with local Standard Operating Procedures.
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