Ground Balance Procedure For Fixed - Minelab GPX-4000 Quick Start Manual

42 Ground 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.
Fixed
3 Whilst keeping the coil parallel to the ground, lower
and raise 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. 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'.
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")
It is very important when Ground Balance re-set in Fixed
searching with a Fixed
Whilst sweeping the coil, test if you are still in
Ground Balance, that the
harmony with the ground by stopping, and raising
Ground Balance setting
and lowering the coil. If the Threshold remains
is regularly checked and
stable then you are still Ground Balanced. If there is a
maintained. Testing by
change in the Threshold, then you need to re-set the
raising & lowering the coil
Ground Balance setting.
is quick and simple and
This is achieved by simply repeating steps 3-6 of the
should become a regular

Ground Balance procedure for Fixed.

part of your detecting
technique.
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
that you will actually be swinging it 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.
43
(pg 56)