Ground Balance Value
Important Details Concerning Ground Balance
Ground balance value provides information about the ground you are searching on. Some
typical ground types are as follows:
0-25 Wet salt water or wet alkali soils.
25-50 Wet salt water and wet alkali soils covered with dry layers.
50-70 Regular, low-quality soils.
70-90 Highly magnetic soils, magnetite or maghemite and similar highly mineralized soils,
black sand.
1. Upon start up, the ground balance value is set as 90. The device can perform ground balance
automatically within the range of 20-90 in all modes.
2. If the ground mineralization is too low, automatic ground balance may fail to work. Try manual
ground balance in such a case.
3. You can test the accuracy of the ground balance with the pinpoint mode. After ground
balancing, if you receive no sound or a weak one when you move the search coil closer to the
ground in the pinpoint mode, then the ground balance is successful. If the sound gets louder
when you move the search coil closer to the ground, then the ground balance is not successful.
In this case, simply change your location. If ground balance is not possible despite these efforts,
you should continue your search without performing ground balance.
In order to search without ground balancing, restart the device . If you hear a sound when you
swing the search coil over the ground, switch the device to DISC.1 or DISC.2 mode, adjust the ID
Filter enough to eliminate the sound and start searching. Since the ID Filter is not active in the
ALL METAL mode, you cannot perform a search if you can’t reduce the sound.
4. Once the ground balance is set, it will remain satisfactory for a long time in most areas.
However, if you encounter an excavated, backfilled or geologically composite soil structure
(these type of soils can be encountered frequently on gold fields), ground balance should be
performed again to adapt to the varying soil structure.
5. When using the optional large coil, pump the coil more slowly and do not keep it very close to
the ground.
6. In some cases where the iSAT value is set high, the device may not be able to ground balance
automatically. In such a case, first lower the iSAT and after ground balancing switch it back to its
previous position.
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Ground Balance
