Nokta detectors Fors CoRe - Manual (Page 29)

In reality a simple principle can save you a lot of time: ''If the target encountered is not a
rock, it can be metal''.
The key to finding targets especially under positive hot rocks is knowing the maximum ID
value of the positive hot rocks around you. If you are searching in the General Search
mode, keep an eye on the ID. If the ID is close to the rock and iron range, there is a high
chance of finding a target under the rock. Because ID Masking is not an option in the
General Search mode, you need to ignore signals based on the ID number on screen.
In the discrimination modes, if you eliminate hot rocks with a properly adjusted ID Masking
setting, you can hear the signal of the target under the rock if the target signal has a slightly
greater effect than the masked ID. The important thing here is that if you detect a target
and dig out a rock, you should note the ID you got before digging and use it as the ID
Masking value the next time.
For example; the hot rocks in your search field tend to give IDs around 3-4. In this case, you
should set the ID Masking to maximum 5. This way you can eliminate rocks and the signals
of metals underneath. If you set the ID Masking too high unnecessarily, you will lose metals
along with rocks.
If the hot rocks in your search area tend to give high IDs, then the chances of missing the
signals of small metals underneath will be high as well.
SEARCHING IN SHALLOW WATER AND ON THE BEACH
FORS CoRe 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 CoRe 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.
FORS / Page 28
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NOKTA DETECTORS
METALS UNDER HOT ROCKS