42 43Ground Balance Procedure for Fixed
For Ground Balance type General.
1 Find a clear area of ground without any targets.
2 Change the Ground Balance switch to Fixed.
3 Whilst keeping the coil parallel to the ground, practise
raising and lowering the coil between 25mm and 100mm (1”
and 4”) over the ground. Try to lower the coil as close to the
ground as possible without touching it.
4 While moving the coil press and hold the Quick-Trak button.
The Tracking program initiates a very fast Ground Balance for
a short time.
Note: This is the same effect as changing the Ground
Balance switch to Tracking on the front panel.
5 Continue moving the coil up and down until the ground
noise has stopped. When there is no longer a change in the
Threshold the detector is ‘Ground Balanced’.
Note: A persistent signal may indicate a target in the ground.
If this occurs, then move the coil to a new location and repeat
the procedure.
6 Release the Quick-Trak button to return to the Fixed position
and commence detecting.
100mm (4”)
Ground Balance reset in Fixed
Whilst detecting, you should periodically test that you are
effectively compensating for ground noise; stop, then raise
and lower the coil in the same spot. If the Threshold remains
stable then you are still ground balanced. If there is a change
in the Threshold you will need to reset the Ground Balance
setting.
This is achieved by simply repeating steps 3–6 of the Ground
Balance Procedure (Detecting in Fixed) on p. 42.
Ground Balancing Tips
When going over old patches (i.e. small concentrated areas
known to have produced gold nuggets) run in Fixed Ground
Balance and periodically re-Ground Balance with the Quick-
Trak button every few metres.
When Ground Balancing in very rocky terrain lower the coil to
the height above the ground you will actually be swinging at.
In highly magnetic soils you may have trouble ground
balancing the coil all the way to the ground (most common
with larger Monoloop coils). If you experience this you can
change the Ground Balance Type to Specific; which requires a
different ground balance procedure (p. 56).
If you find that the ground requires repeated re-balancing, you
may decide to search in Tracking.
Note: Use this procedure to
periodically test that you are
effectively compensating for
ground noise.
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