Nokta detectors Fors Tech - Manual (Page 29)

SEARCHING IN SHALLOW WATER AND ON THE BEACH
FORS Tech search coils are all waterproof. This provides convenient searching in shallow
water and on beach. If searching around water, be careful not to get the system box or the
handle wet.
As mentioned before, salty water or alkali ground are highly conductive d and they create
iron effects on detectors. FORS Tech Conductive Ground mode (COG) is specifically
designed for these types of ground. You can easily search with the COG mode without any
other settings.
COG mode is ideal for wet sand beach. When searching on dry sand, you can also use the
other modes.
Please remember the following when searching in water or on wet beach sand:
1) You can get metal signals when you sweep the search coil over the holes you dig on wet
beach sand, this is normal.
2) The search coil may give false signals when going into and coming out of the water so
please try to keep the coil either in or out of the water.
IMPORTANT! Because the ID Masking value of the COG mode is preset to 40 to eliminate
ferrous metals or ground effects due to iron mineralization, you may change the search
mode or set the ID Masking below 40 if you are searching for ferrous metals.
When the ground tracking is active, the device may give a warning tone and ID when it
passes over a hot rock because the effect of the hot rock will be different than the
ground's. If you sweep the search coil over the rock, ground tracking will automatically
adjust the setting and the warning tone/ID will either disappear or diminish significantly.
Because there is a slight delay in ground tracking, you may hear a strong signal at the first
one or two sweeps until the setting is adjusted. Then the sound will get weaker and
disappear. This will not happen with metal targets because metals will prevent the device
from ground balancing. Therefore, in ground tracking, if you are getting a constant signal
over a target after repeated sweeps, there is a high possibility that the target is a metal.
Moving from over a hot rock back to soil, the device may give signals to the ground for a
few sweeps until the ground balance setting is updated again. This is normal and should
not mislead you.
Under normal circumstances, ground tracking should not be used for elimination of hot
rocks. It is recommended for use in areas with changing soil types.
FORS / Page 27
www.noktadetectors.com
NOKTA DETECTORS
EFFECTS OF HOT ROCKS IN GROUND TRACKING