Minelab F3 Manuel de service télécharger pdf (Page 32)

F3 INSTRUCTOR NOTES

Minelab Countermine Division Safety Through Excellence

OUTDOOR TRAINING/DEMONSTARTIONS

At the completion of the classroom instruction it is important that all students have a

sufficient amount of time to become proficient in the operation of the F3. It is

recommended that outdoor training be conducted over two full days.

It is recommended that the outdoor training be conducted in purpose prepared training

lanes and that there be enough lanes for two students per lane. Each lane should be one

metre wide and ten metres long and the lanes should have a separation of at least ten

metres. It is also very important that the lanes be free from metal contamination prior to

laying any training targets. Although the F3 is capable of canceling the electronic influence

created by another F3 as close as 2m away and still operate to its full capability, a ten-

metre separation between detectors is suggested. This will ensure that those students with

no experience understand how to operate the detector and recognise its responses.

Training lanes should be different from each other offering a range of challenging targets.

Differing targets in each lane allows the paired students to move between lanes during the

training. Simulated targets should represent the widest range of targets presently found in

minefields around the world including those likely to be found in the area of operations.

Whilst the students are practicing in their lanes, instructors should be move between each

group providing feedback.

At anytime during the training day, an Instructor should conduct the following

demonstrations to complement the information gained in the previous lessons:

• Ground Balance. If the soil in the training area is benign, prepare ahead of time and

obtain some mineralised soil from the local area or a local brick manufacturer or

distributor. Fired clay roof tiles work very well. Demonstrate to the class the reaction

from the F3 when it is passed over mineralized soil. Conduct Ground Balance (GB).

Repeat this process with a target laid under the mineralised rock. A common question

refers to the possibility to GB away a metal target. The fact is that it is possible to GB a

very small target in very heavily mineralised soil. Attempt to demonstrate this with a

mineralized rock (hot rock) and an inert M14 or equivalent inert mine. It is most unlikely

that bigger targets in benign soil can be balanced out. Minelab does not recommend

that an operator try to balance out a potential target in a mine lane as proof it is actual

metal. However, if a small target was GB then it should be obvious to an operator

because when the coil is moved away from the target there should be an alarm from the

surrounding soil. Make sure there are no misunderstandings on this important point.

• Test Piece Procedure. Exactly as shown in the Field Guide.

• Pinpointing. Minelab detectors pinpoint their targets in a different way to all other

detectors and if the students have used another detector then it is important that the

correct procedure for pinpointing is taught and adopted by the students. Review the

pinpointing procedure taught in Lesson Three of this training programme. When

teaching the application of ‘Mapping the Target’ ensure the students stop coil movement

toward the target as soon as the slightest change is heard in the tone. Move the coil

backwards and forwards to confirm the point of tonal change. At that point, mentally

note the position of the leading edge of the coil on the ground. Approach the suspected

target from other angles and continue to mentally note the coil position on the ground.

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Minelab F3 Manuel de service Page 32

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