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Ground balancing
All soils contain minerals. Signals from ground minerals are often tens or hundreds of
times stronger than a buried metal object. The magnetism of iron minerals, found in
nearly all soils, causes one type of interfering signal. Dissolved mineral salts, found in
some soils, are electrically conductive, causing another type of interfering signal.
Ground Balancing is the process which the metal detector cancels unwanted signals
coming from the ground minerals while still detecting the signals from buried metal
objects. This is accomplished by matching the detector’s ground balance setting to the
phase of the ground signal.
When the detector is calibrated to the soil, the result will be deeper target detection,
quieter operation, and more accurate target identification.
Pumping coil to ground balance with GG button.
How to Ground Balance your detector:
Ground balancing procedure with the “GG” touchpad.
1) Turn the detector on and set GAIN at the 12:00 position.
2) Click on the right knob to the ALL METAL Mode.
3) Rotate the THRESHOLD control knob to the point where you hear a slight background
hum.
4) Sweep search coil across the ground to find a clear patch of ground with no metal
present.
5) Press and hold the GG touch pad, and pump coil over the clean ground.
See illustration.
Pump coil from within 1” of ground to 6”-8” above ground.
6) When the GND PHASE settles down to only 1 or 2 numbers in variation, release the
GND GRAB® button while still pumping the coil. Note that the audio response to the
ground changed and “Evened Out” when you released the button. Also note that the
GND BAL value changed. After balancing, you can hunt in ALL METAL…or return to DISC
Mode.
