Minelab F3 COMPACT Service Manual page 10

F3 COMPACT Service Manual
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Press and hold the green Ground Balance button whilst slowly moving the ground
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balance test piece from approximately 15cm (6in) above the coil towards the centre of
the coil (and touching the coil). Then, move the ground balance test piece away from the
centre of the coil to a distance of 15cm (6in).
Repeat this process until the 'Ground Balance OK' tone consisting of a short high-pitched
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double beep occurs. This tone confirms the ground balance procedure has been correctly
completed.
Release the green Ground Balance button.
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Confirm the ground balance is correct by moving the ground balance test piece from
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approximately 15cm (6in) above the coil towards the centre of the coil. If there is no
alarm from the ground balance test piece the ground balance procedure is functional.
Where the ground balance test is conducted using local soil Figure 6 illustrates the procedure to
Successful ground balancing occurs within 5 to 10 seconds. Where the ground balance test piece
or local ground conditions are not sufficiently mineralised the 'Ground Balance OK' tones may
g.
Earset Test.
follows:
Plug the earset into the detector as shown in Figure 7.
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Switch on the detector and confirm the detection tone is audible using the earset.
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If an Earset Speaker On (4523-0027) is being tested check that detection tones can also
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be heard from the detector loudspeaker (in the detector body).
If an Earset Speaker Off (4523-0025), identified by green band on the earset cable near
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the plug, is being tested check that detection tones can only be heard in the earset and
not the detector loudspeaker (in the detector body).
Figure 6: Ground Balance
take up to 20 seconds to complete.
This test confirms the earset is operating correctly and is conducted as
NOTE
be followed.
NOTE
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