Minelab F3 Servisní příručka stáhnout pdf (Strana 25)

F3 INSTRUCTOR NOTES

Minelab Countermine Division Safety Through Excellence

Twenty

One

Pin-Pointing Procedure (Cont.)

o STEP 2 Determine Centre of Target

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 pin-point the centre of the

target.

For larger targets, to determine the centre, the coil should be slowly

moved across the mapped area. As the coil approaches the centre of

the target, the threshold 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.

P0855-A

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 Threshold Tone should decrease from maximum as the coil

leaves the centre and return to maximum as the coil returns to the centre.



Twenty

Two

Multiple Targets

• There may be occasions when an operator will encounter multiple

targets.

For example, small anti-personnel mines may be laid in a cluster, or a large

anti-tank mine may be surrounded by smaller anti-personnel mines or

booby-traps. Regardless, the pin-pointing procedure for the F3 can be used

to effectively map a suspicious area as follows:

o STEP 1 Mapping the Target

Using edge detection technique to map the suspicious area.

Maximum Volume

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Minelab F3 Servisní příručka Strana 25