F3 COMPACT Service Manual
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7
Note
The coil should not be moved nor should metallic objects be brought near the coil during this
procedure.
•
If functioning correctly, the noise cancelling procedure will commence with two single
beeps followed by 45 seconds of sharp double beeps and finish with four single beeps.
•
During the 45 seconds the F3 COMPACT scans the environment searching for the source
of any electrical interference. Once detected, the detector will automatically select a
different operating frequency to eliminate or reduce the interference.
e.
Audio Reset Test
. This test confirms the audio reset button (also the ground balance
button) and the associated wiring and circuitry operates correctly. The objective is to ensure the
threshold tone returns to its correct volume if altered from its steady state. The test is
conducted as follows:
•
Hold the coil at least 600mm (24in) off the ground and away from any metallic objects.
•
Induce a threshold tone change in volume by slowly moving the coil toward a metal
object and once the threshold tone increases in volume hold the detector stationary.
•
Once the threshold tone has increased in volume, press and immediately release the
green audio reset button. (Figure 5)
Note
If the ground balance button is not immediately released the F3 COMPACT will commence the
Ground Balance procedure.
Figure 4: Noise Cancel
