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GM3+PB
2. Setting the Detector in mode, automatic ground balance.
Setting the power of the detector that will work - mode,, TURBO "(switch is placed in a
position to demand searching drill) or mode, normal power (switch is placed in position the to
operator) (Fig.1)
Switch,, GB "is placed in position,, AUTO .
keys,, AUDIO DISC "and,, VCO DISC" are placed in position,, OFF''. In this mode the
potentiometer,, GROUND BALANCE "and,, SENS" do not work, ie no matter in what
position they are.
The depth of detection of metal objects depends on the position of the Potentiometer,,
THRESHOLD " For maximum depth, the potentiometer must turned right to the maximum
sound level.
The power of separation of the metals is determined by the Potentiometer,, DISC LEVEL
"(greater position of the metals division is better), in the presence of non-ferrous metals (gold,
silver, copper, bronze) resonant sound is heard, and in the presence of black metal (iron)
could be heard crackling sound or tear. If you want to eliminate most pollutants from modern
non-ferrous metals (foil caps, etc..) position of the Potentiometer should be 8-10 scale.
Searching for metal objects is made through movement of the search rack against the ground
(fig.3, fig.4). Always move the search rack close to the ground, lifting reduces the depth of
search! Movement should be made smoothly , In the fast movements of the search rack
(fig.3)are easyly located surface metals, slow movements are suitable for searching of buried
metal objects.
The exact location of the metal is made by the movement of searching head in two
perpendicular axes (Fig. 5).
7. Depth of detection of metal objects
The depth of detection of metal objects dependents on several factors.
1 .The higher the area of the metal object is, the depth of detection is greater!
2. From location against the searching drill
Horizontally located coins (objects) are detected in greater depth!
3. The type of soil
In mineralized soil depth the detection is less, respectively in sandy soil depth is greater!
4. By power of discrimination
Each metal detector regardless of the model has the most depth in mode without
discrimination (mode ALL METAL). As more is the separation of metals (discrimination)
more is reduced the depth of detection. In soils with low mineralization, the power of
discrimination affects less the ie depth indicators are very similar to those in mode,, ALL
METALL''!
5. The size of the search coil
Small search drills find better small metal objects (coins). Large drills> 32 cm are appropriate
and have a greater depth of search for large objects!
6. From the time that is overripe metal objects in the ground.
Signals from a metal objects resident more than 5-6 months. is 2-3% more intense than at the
time of burial!
7. The experience and skills of the operator!
7


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