Minelab Sovereign GT Manual de usuario descargar pdf (Pagina 15)

p24

8.2. Calibration of Meter

Before using the Digital Target Meter, it is necessary to calibrate it as follows:

a) Set the Calibration control knob (situated to the rear of the meter) to the center position

of its range.

b) Place the detector in a stationary position with the coil flat on the ground.

c) Set the Sensitivity control on the Control box to Auto (extreme anti-clockwise).

d) If the threshold is varying because of electrical interference, adjust Sensitivity clockwise

towards minimum until a constant threshold is present.

e) Slowly pass a common coin across the coil and finely adjust the Calibration control to

the nearest number, divisible by 5 [e.g. US quarter -set to 170 , AUS 20c - set to 165.]

f) Slowly pass additional coins and other common targets across the coil and record the

results on the target recognition table shown on page 25.

This table will become an excellent guide when used in conjunction with the Digital Target

Indicator until the various target responses become familiar. This meter should not be

solely relied upon for discrimination. It is important to use the other features of the

Sovereign GT

to aid in the process of discrimination.

Be aware that some similar objects may vary in Target Indication readings because of

changes in composition. For example, gold rings will produce different readings

depending upon the purity of the gold and the size of the band. Coins minted in different

years may have different alloy combinations and so the reading will differ. The Target

Indication readings will also be influenced by an object’s orientation, the length of time it

has been buried in the ground and different ground conditions.

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p25

Target Recognition Table

Object Type Reading

US quarter non-ferrous 170

AUS 20c non-ferrous 165

1 2 ... 10 11 12 13 14 15 16 17 18 19

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Minelab Sovereign GT Manual de usuario Pagina 15