Minelab F3 Servisní příručka stáhnout pdf (Strana 18)

F3 INSTRUCTOR NOTES

Minelab Countermine Division Safety Through Excellence

150mm

(6 in)

Beep

P0623-A



NOTE

Movement of the coil during the entire Ground Balance procedure should be

slow, continuous and smooth and each down and up movement should take 3 to

4 seconds.

If the Ground Balance OK tone is not heard within 20 seconds of starting the

procedure, release the Ground Balance button and repeat this procedure.

If there is metal in the ground under the coil whilst Ground Balancing, the

detector may not ground balance correctly. Move the detector and repeat the

Ground Balance over ground that is free of any metallic objects.

After the Ground Balance procedure is completed the detector will automatically

cancel interference from the ground under the Coil. If ground conditions change

(changing mineralisation in the ground) this procedure may need to be repeated.

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Sixteen

cont

o STEP 3 - Test Piece

Ensure the operator’s hands and arms are free of metallic objects

(watches, rings etc), and that no other metallic objects are near

the coil. The orientation of the Test Piece during the test is

dependent on which Sensitivity Endcap is connected to the

detector.

Black Sensitivity Endcap:

Hold the Test Piece above the middle of the Coil with the

rounded end (containing metallic target) AWAY from the

Coil.

Move the Test Piece towards the centre of the Coil until it

lightly touches the coil then move it sideways off the coil

(the Test Piece should be moved slowly and smoothly

during this procedure). A faint but clear response (change

in Threshold Tone volume and pitch) should be heard

indicating the sensitivity of the detector is correct.

NOTE

Maximum sensitivity is only available 30 seconds after the Threshold Tone is

heard. Do not test the detector with the Test Piece until 30 seconds after the

Threshold Tone is heard.

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