Nokta detectors Fors Tech - Manual (Page 22)

GROUND BALANCE VALUE:
The ground balance value indicates the type of ground. 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
IMPORTANT DETAILS ABOUT GROUND BALANCE:
When the device is turned on, the ground balance value is preset to 90. Automatic ground
balancing value ranges from 40-90 in all modes and from 0-90 in COG mode. If the ground
mineralization is too low, the automatic ground balance may not work except for the COG
mode.
You can test the accuracy of the ground balance setting in the pinpointing mode as well.
Once the ground balance is done, lower the search coil to the ground. If the device receives
no signal or a very weak one as the search coil approaches the ground, it means that the
ground balancing was successful. On the contrary, if the device receives noise as the search
coil approaches the ground, it means that the ground balance has failed. In this case,
change your location and try re-ground balancing. If you still cannot ground balance, you
need to continue searching without ground balance. Turn off and on the device again and
start searching without ground balancing. If you receive noise when you sweep the coil
over the ground, set the search mode to DI3 or DI2 (adjust sensitivity accordingly) or to
COG mode if you are on the beach and increase the ID Masking to a level where the noise
is eliminated. On the other hand, because the ID Masking is not active in the General
Search, if you cannot reduce the noise, you cannot continue searching either.
Once the ground balance is set, it will remain satisfactory for a long time in most areas.
However, in areas where the soil has been disturbed by digging or filling up, or in
geologically complex areas, you may have to ground balance frequently to accommodate
changing ground conditions.
FORS / Page 20
www.noktadetectors.com
NOKTA DETECTORS
GROUND BALANCE