Ground Balancing - Teknetics G2 Owner's Manual

GROUND BALANCING

What is Ground Balancing?
Why do I need to Ground Balance?
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 by which the metal detector
cancels the 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.
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 searchcoil 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.
The most accurate GND PHASE value is the value displayed when "pumping"
the searchcoil over the ground in an area free of metal.
Ground Balancing continued on next page
Pumping coil
to ground
balance with
GG button.
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