Step 2 Determine Centre Of Target - Minelab F3 compact Operation Manual

F3 COMPACT Version 2 Operations Manual

STEP 2 Determine Centre of Target

4.5.2
In Step 1, the area of a target was determined. If the metal in the
target is sufficiently small, the area mapped will also be small and
therefore it is a relatively simple matter to pinpoint the centre of
the target.
To determine the centre, for larger targets, the coil should be
slowly moved across the mapped area. As the coil approaches
the centre of the target, the Detection Tone will increase to a
maximum volume (pitch may be high or low depending on the
composition of the metal). Where maximum volume is achieved,
the coil can be considered to be above the centre of the target.
Once confirmed, local Standard Operating Procedures should be
followed to mark the target.
Maximum Volume
Figure 22: Determine target centre
NOTE
An operator can confirm that the centre of a target has been
located by moving the coil slightly in any direction, and returning
to the centre. In doing so the volume of the Detection Tone should
decrease from maximum, as the coil leaves the centre, and return to
maximum as the coil returns to the centre.
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