Pinpoint in Cancel will again be to one side of centre and signals
may be complex if target is close to the coil. This setting will limit
sensitivity to deep targets.
NOTE Coils not specifically designed for the GP 3000 may
behave erratically or be ineffective in either M (Mono) or
Cancel modes.
Minelab Monoloop coils can be used on the GP 3000 with excellent
results and we recommend their use in conjunction with the coil switch in
the M (mono) mode. This allows the use of monoloop coils in soils
where prospectors previously had to revert to using Double D coils.
In extreme mineralization, particulary heavy ironstone concentrations,
you may experience a loud signal spike when attempting to ground
balance or while searching. The signal is random and very sharp and it
is not characteristic of a normal target signal. To prevent it from occuring,
keep your coil a few centimeters from the ground, or opt to use the
standard GP coil in Double D mode.
Balance (Fixed/Tracking)
Figure 4.21
The GP 3000 may be operated with fixed ground balance or automatic
ground balance.
• When Balance is set to Fixed, the ground balance remains at the
current level.
• When Balance is changed from Fixed to Tracking, the detector
begins to automatically ground balance through a two stage
process that is described on page 33.
To obtain the best performance from your detector, it is important to know
how different ground conditions affect the detecting process. See
“Ground Balancing” on page 33 for more detailed information.
Figure 4.22 Balance (Fixed/Tracking)
switch
26
CONTROLS
4
Balance
Tracking
Fixed
P0529-A
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