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F3 COMPACT Operations Manual
4.6.2 STEP 2 Determining the Centre of Target
The pitch of the Threshold Tone will rise or fall depending on the
combination of metals or the composition of metal in a mine. This
means that, in some instances, experienced operators may be able
to identify one mine against another (see Figure 24).
By slowly moving the coil across the mapped area, it may be
possible to detect tonal differences indicating multiple targets.
Figure 24: Multiple targets
4.7 Operating Multiple Detectors in Close Proximity
On occasion it may be necessary to operate F3 COMPACT
detectors in close proximity. In normal circumstances, an F3
COMPACT detector can operate as close as two metres (seven
feet) to another without suffering excessive mutual interference. To
achieve this minimum operating distance between detectors, Noise
Cancel must be conducted as follows:
a. With all other detectors switched off, switch on the first detector
and perform Noise Cancel as described in section 4.3.1.
* WARNING *
The volume from a large target may mask that
of a small target if the small target is located very
close to the large target.
Maximum Volume
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