Step 3 Test Piece - Minelab F3 COMPACT Operation Manual

F3 COMPACT Operations Manual
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 will not Ground Balance
correctly. Move the detector and repeat the Ground Balance over
ground that is free of 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.
For operator training purposes, once Ground Balance has been
successfully completed, the detector can be made to 'forget' the
Ground Balance conditions by pressing and holding the Ground
Balance button for five seconds. This will allow the operator
to practise the Ground Balance procedures against the same
mineralised ground.

4.2.3 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.
a. Remove the Test Piece from its stowed position on the Armrest
by extending the Armrest and rotating the Test Piece clockwise.
Hold the Test Piece above the middle of the coil with the end
containing metal AWAY from the coil.
b. Move the Test Piece towards the centre of the coil until it lightly
touches the surface 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.
With the LED display enabled, the Test Piece Procedure will result in
the illumination of at least one additional LED
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