Minelab F3 Wartungshandbuch PDF herunterladen (Seite 7)

F3 Field Service Manual

Page 7

b Switch ON Test. The Switch ON Test checks that power is correctly supplied to the

electronics pack and internal diagnostics discover no system fault. The test is conducted as

follows:

● Extend the lower shaft at least 150mm (6ins).

● Hold the coil at least 600mm (24ins) from the ground and away from any metallic

objects and switch on.

● Ensure that four rising tones occur over approximately 12 seconds. A steady

threshold tone should be heard a few seconds after the rising tones finish.

NOTE

On occasion, it is possible that more than four rising tones occur. This does not represent

a fault provided the rising tones finish and a steady threshold tone is produced.

Figure 3: Switch ON Test

● If the correct tones are not heard, check that good batteries are being used and that

the batteries are fitted correctly.

● If the correct tones are still not heard refer to Section 4 for faultfinding procedures.

c. Noise Cancel Test. The test ensures the F3 successfully completes the noise

cancel procedure required whenever local electrical interference is present. During the test,

the Noise Cancel button, wiring loom and electronics pack are checked for correct operation.

The test is conducted as follows:

● Hold the coil stationary and at least 600mm (24ins) above the ground and away from

any large metal objects during the test.

● Press and

immediately release

the Noise Cancel button. (Figure 4)

Figure 4: Noise Cancel

NOTE

The coil should not be moved nor should metallic objects be brought near the coil during this

procedure.

● If functioning correctly, Noise Cancel will commence with two single beeps followed

by 45 seconds of sharp double beeps and finishing with four single beeps.

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Minelab F3 Wartungshandbuch Seite 7