![background image](http://html1.mh-extra.com/html/minelab/gpx-4000/gpx-4000_quick-start-manual_1801295001.webp)
Search
Mode
Soil /
Timings
Ground
Balance
Coil /
Rx
Cancel
Tracking
Salt
Deep
Patch
Sensitive
Fixed
Double D
M
N
G
Set the front panel switches to the following positions:
Threshold
Auto Tune
Ground
Balance
Tracking
Fixed
Threshold
On
/
Off
Hold for
FP
Press the On/Off button on the rear control panel.
(pg. 25)
Turn the Threshold control up until a tone is audible
through the headphones.
(pg. 34)
Raise the coil off the ground and Press the Auto Tune
button to reduce electrical interference. The tuning
process takes approximately 60 seconds. Do not move the
coil or pass metal objects near the coil during the tuning
process.
(pg. 33)
Whilst lowering and raising the coil between 25mm and
100mm (1" and 4") from the ground, change the Ground
Balance switch to Tracking. Any variations in the Threshold
will smooth out within 3-5 seconds.
(pg. 40)
Adjust the Threshold to a very faint but still audible level.
It should be smooth with only minor fluctuations.
(pg. 34)
You are now ready to start searching!
Quick Start
Search
Mode
Soil /
Timings
Ground
Balance
Coil /
Rx
Patch
Sensitive
Fixed
Double D
N
G