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Operating Modes
7.4 Discrimination
This operating mode is used to identify metals and cavities. Therefore it is necessary to connect the
optional available Supersensor. If you don't have the optional Super Sensor, contemplate very seriously
on acquiring one. This is an extremely powerful function and can assist you in verifying real targets.
There are three basic modes in which you will use this function. Discrimination of course, tunnel
recognition, and then also when on the water from a boat. For water operations, please contact one of
our trainers at the factory to receive a more detailed operation. In this section we will only cover
Discrimination and Tunnel Recognition.
In this mode there is no given manner fixed or a scan direction. You can walk as you want to determine
the soil. This operating mode is most effective if you have already detected possible objects and now
want to know more details about them.
The Supersensor should point vertical towards the ground. It should not be turned or pivoted.
Now you can slowly move the Supersensor from one side to another above the possible object. Please try
to capture the complete object, which means you should measure beyond the edges of the object. Repeat
this measurement a few times to get a clear signature of the object. There are 3 different signatures,
from which you can recognize a specific characteristic of any target.
The figure 7.12 shows a typical signature of a ferromagnetic metal like iron. The signature includes a
positive (red) and a negative (blue) amplitude. When looking closely you can see even 2 ferromagnetic
signatures. The first signature starts with a positive amplitude and the second signature starts with a
OKM Ortungstechnik GmbH
Illustration 7.11: Discrimination
Illustration 7.12: Signature of a ferromagnetic metal target
Ferromagnetic metals
Ferromagnetic targets have a positive-
negative-signature.
