DTI GmbH & Co. KG
A further parameter which influences the detection is the ‘DISCRIMINATOR’.
Again set all parameter to factory settings. Chose now the parameter
‘DISCRIMINATOR’ 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 metals. Influential factors are its conductivity, shape, alloy,
position and distance. Furthermore 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 reproduce able for a clear identification.
The sum of characteristics of different object may show a silver- or gold-signal
depending 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
combine 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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