GROUND BALANCING
Ground Balancing Procedure
Figure 5.2
• Move the coil up and down between 20mm and 100mm above the
ground and, while moving the coil, change Balance from Fixed to
Tracking.
• The fast ground balance lasts only 5 sec. after switching to
Tracking. Therefore, it is important to be moving the coil as the
switch is changed.
• Keep moving the coil until all ground noise has stopped. 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.
• When there is no longer a change in the threshold, while the coil is
being raised and lowered, the detector is 'ground balanced'.
• When the detector has been ground balanced, the user may select
either Fixed or Tracking for detecting. See previous page.
If the ground is highly mineralised or variable, use Tracking.
If the ground mineralisation is very 'mild' to medium, use Fixed and
switch back to Tracking periodically to re-ground balance. Do not test a
target by switching to Tracking when the coil is above it.
HINT It may useful to repeat the ground balance procedure if ground
conditions change rapidly.
Figure 5.2 Setting the ground balance
34
OPERATION
5
20 - 100mm
P0506-A
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