DTI GmbH & Co. KG
A further parameter which influences the detection is the ‘DISKRIMINATOR’ –
discriminator - .
Again set all parameter to factory settings. Chose now the parameter ‘DISKRIMINA-
TOR’ by pushbutton ‘F1’. The discriminator has a range of 1-5. When sensitivity it set
to high values it is not possible to detect smallest and big objects in the same way.
The discriminator is based on an alloy algorithm. It is compareable to a beam-
balance. The possibility for distinguishing is based on the characteristics of the met-
als. Influential factors are its conductivity, shape, alloy, position and distance. Fur-
thermore the type of soil is important. The electromagnetic field can be scattered,
directed or bended. Also there is an enormous volume of soil behind the detected
object which is detected and measured too. Perhaps here a bigger distance of the
coil to the soil or tipping the coil may help. It is essential that the detecting is reprodu-
ceable for a clear identification.
The sum of characteristics of different object may show a silver- or gold-signal de-
pending on position, depth and soil. If you think about how many factors have to be
considered it is not surprising. Therefore test with different objects and necessary.
Bigger or massif precious metals will always show a negative result in the air, if they
are not alloyed. Even clearest gold will be alloyed by crystals and salts in the soil.
In setting 1 the discriminator is most sensitive to filter out iron and massif objects. A
golden ring (333, 485) will be detected clearly. After start the discriminator is set to 2.
Test the different settings with different materials (chains, rings, coins) and observe
the reaction of the number-, graphic- and spectrum-display. Mix the materials with
iron nails and other materials. By mixing, changing distance and movement you will
learn the reaction of discrimination.
By adding different materials which you move additionally you simulate different soils
e. g. beside lying objects. You should do this with different discriminators and com-
bine it with the described parameters. Often it is also possible to recognize the metal
by following the course of detection. Ferromagnetic material produces a long floating
course over the complete diameter of the coil. Gold on the other hand produces a
lower tone at the edge of the coil.
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