Minelab MF5 Service Manual page 10

MF5 Service Manual
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c. Ground Balance Test. The ground balance test confirms the MF5 is capable of ground
balancing against mineralised ground. In doing so, it confirms the correct operation of the
ground balance button, coil and associated circuitry.
The ground balance test can be conducted using a ground balance test piece which must be
metal free and can be a rock or soil sample that is mineralised enough to cause an alarm from
the detector. The test is conducted as follows:
•
Ensure hands and arms are free of metal objects (watches, rings etc) and that no other
metal objects are near the coil.
•
Conduct a factory reset or a Ground Balance with the coil in the air away from any metal
targets. This clears any previous ground balance memory from the MF5.
•
Sweep the coil left to right and up and down over metal free ground. If the ground is
sufficiently mineralised or magnetic the detector will alarm (ground noise).
•
Conduct the Ground Balance procedure and confirm ground noise is reduced.
•
Provided ground noise is reduced or eliminated then the ground balance test is successful.
d. Earset Test. The earset test confirms the earset is operating correctly and is conducted as
follows:
•
Plug the earset into the detector.
•
Switch on the detector and confirm the detection tone or heartbeat is audible using the
earset.
•
The MF5 will always provide audio to a connected Earset regardless of the user selected
options/controls.
Figure 5: Connect the Earset
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