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A standard humanitarian demining Earset (Earset Speaker On)
permits the F3‟s internal speaker to continue to function even
when the Earset is connected.
For military countermine applications, an Earset that mutes the
F3‟s internal speaker when the Earset is connected is available
(Earset Speaker Off). The Earset Speaker Off is identified by a
short length of green tubing located at the rear of the Earset plug.
3.2 Sensitivity Endcaps.
A unique feature of the F3 is its ability to change sensitivity through
the exchange of Sensitivity Endcaps. This design feature eliminates
the possibility of an operator selecting the wrong sensitivity through
manipulation of knobs or switches. The Sensitivity Endcap provides
an obvious visual cue that confirms the level of sensitivity selected in
the F3. The F3 is supplied with Black and Red Sensitivity Endcaps.
Black Sensitivity Endcap.
With the Black Sensitivity Endcap
fitted, the F3 performs at maximum sensitivity. The Black Endcap
MUST
be selected when searching for minimum metal mines or
when maximum clearance depth is required.
Red Sensitivity Endcap.
With the Red Sensitivity Endcap fitted,
the F3 performs at reduced sensitivity. This feature may be
useful when there is a need to ignore small metal fragmentation
on the surface but still detect large targets at depth.
NOTE
If the Red Sensitivity Endcap is not fitted correctly, or there is no
endcap fitted, the detector automatically defaults to the maximum
sensitivity setting (Black Sensitivity Endcap). If the Red Sensitivity
Endcap is partially dislodged or removed during use, an alarm tone
will sound.
**WARNING**
Minelab strongly recommends that an operator should
always wear an Earset when using the F3 detector.
