Nokta FORS Gold User Manual page 19

After the ground balance button is released, the device will work in the General Search
mode and the ground balance value will remain on screen for a while. (If you do not want
to wait for this period you can go to the main screen by pressing and releasing the pinpoint
button once). This gives you the opportunity of fine tuning the automatic ground balance
value. Please refer to the following MANUAL GROUND BALANCE section for more details.
MANUAL GROUND BALANCE:
It is the process where you set the ground balance value manually. Because it is more time
consuming, it is not preferred by most users. However, it becomes useful when ground
balance cannot be achieved by other methods or when you need to fine tune the
automatic ground balance value.
FORS Gold is designed in a way that you can easily auto ground balance it on all types of
ground. Therefore, we recommend that you use automatic ground balance at start up.
However, some soils are not suitable for automatic ground balancing. For example; wet
beach sand, soils containing alkali or salty water, trashy areas, plowed lands, highly
mineralized ground or ground with very low mineralization are not suitable for automatic
ground balancing. We recommend you to manually ground balance in such areas for your
convenience. Manual ground balance requires experience acquired with some practice.
To ground balance manually:
1. Find a spot on the ground where there is no metal.
2. Pump the search coil up and down from about 15-20 cm (~6''- 8'') above the ground
down to 3 cm (~1'') o the ground.
If the sound gets louder as you lift the search coil o the ground, it means that the ground
balance value is too low. In other words, the ground is negative and you need to increase
the ground balance setting with the up switch. On the contrary, if the sound gets louder as
you lower the search coil to the ground, it means that the ground balance value is too high.
In other words, the ground is positive and you need to lower the ground balance setting
with the down switch.
3. Press and release the ground balance button once. The ground balance value will appear
on the LCD panel and will stay on screen for a while. If the screen changes, you can press
the ground balance button again.
60 60
Ground Ground
Balance Balance
Pump The Coil Pump The Coil
To increase the ground balance setting, press the up switch and to decrease it, press the
down switch. If you press the switch one by one, the values will change one by one as well.
If you hold the switch pressed, the values will change rapidly.
NOKTA DETECTORS
G RO U ND BA L A NCE
Manual ground balance ranges from 0-99. However each
20 20
number includes 5 steps used for fine tuning and these
steps are shown on the LCD panel over the
and in multiples of 20. For example; the ground balance
value on the screen to the side is 60.20.
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FORS / Page 18