Dal manuale:
5. “DISC” serves to set the degree of rejection (discrimination) of ferrous
and various types of magnetic metals and alloys. With this potentiometer, the
unit can be set to eliminate some unwanted metal objects, for example iron
scraps, wires, nails, bottle caps, horseshoes, etc.
For the normal discrimination of ferrous from non -ferrous metals, “DISC” is
usually placed in position 4 or 5.
If we want to increase the degree of discrimination of larger irons, flat sheets,
rusty cans or other larger iron waste, the “DISC” level can be increased to about
7 - 8 or even more. When detecting large or flat irons, mixing of the low -high
sound signals may occur due to the shape and size of these iron wastes. In these
cases, the so-called
vertical discrimination method can be used. Localization and
determination of the type of metal is not by side swings left-right, but by raising
the coil in the air above the detected object and approaching the ground as well
(to the location of the detected metal object). Visually this can be seen here:
www.youtube.com/watch?v=l6Z-MxOsHz4 In this way magnetic and non -
magnetic (non-ferrous) metals are unmistakably distinguished.
It is recommended that with high mineralization (soils with a high content of iron
oxides) the DISC value should be reduced to position 3 or lower to avoid the so-
called "ironizing" - the reversal of the sound identification from high to low tone
when detecting non-magnetic (non-ferrous) metals. This effect can be manifested
in magnetic soils, when detecting small metal targets at a greater depth. If in
doubt about such soils, it is good to check them with a magnet. If the soil sticks
to the magnet, the DISC must be reduced.
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La parte in grassetto mostra il concetto di discriminazione verticale pompando sui target dubbi, visibile nell' ultimo video del mio primo post.
E poi una parte che interessa Ogli sui terreni a forte mineralizzazione molto magnetici che conosce...