Introducing The Gpx-4000 - Minelab GPX-4000 Quick Start Manual

4 Introducing
the GPX-4000
The GPX-4000 utilises Minelab's proven 'Dual
Voltage Technology' (DVT). This ensures an accurate
Ground Balance to provide maximum sensitivity and
depth in all ground types. The GPX-4000 can handle
heavily mineralised and salty ground conditions
with greater ease than previous detectors, which
effectively opens up NEW detecting areas.
The GPX-4000 offers three pre-programmed
Search Modes, set up for the three common search
techniques – Patch finding; General detecting and
Deep slow careful detecting. As you become familiar
with all the new functions of the GPX-4000, you can
then program your own settings for each Search
Mode.
All setting changes are automatically saved when
the detector is turned off and loaded when you
switch the detector back on. You can also restore the
Factory Preset settings at any time.
There is an LCD on the rear of the control box. Simply
scroll through the various functions of the detector
and adjust the setting. This is more accurate than
the old method of turning the control to 'about 2-
o'clock'. Now you can accurately compare the effect
of different settings and easily remember your
preferred levels.
New Functions
Gain – The Gain function sets the overall sensitivity
level of your detector. In areas where conditions are
mild, you can increase the Gain. In areas that are
more difficult, Gain can be reduced.
Timings – The GPX-4000 features an improved
set of timings, increasing performance in different
conditions.
Ground Balance Type – In addition to Ground
Balance there is now the choice of two Ground
Balance Types, Normal and Specific. Specific Ground
Balance is designed to be used in very hot ground
and is especially useful with Monoloop coils.
Response – The Response function allows you to
invert the target response. Deep targets can now
sound like the more familiar, 'rising and falling' pitch
of a shallow target signal.
Motion – The speed at which you sweep the coil
has an effect on target response time and Ground
Balance adjustment. Matching your preferred coil
sweep speed with the corresponding Motion setting
can reduce noise.
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