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Page 2
8.2
Calibration
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, devisible by 5 e.g. US
quarter (set to 550), AUS 20
f) Slowly pass additional coins and other common targets across the
coil and record the results on the target recognition table shown on
page 28.
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 soley relied upon for
discrimination. It is important to use the other features of the Sovereign
Elite 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, a gold
ring will vary 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 as well as different ground
conditions.
The Minelab Sovereign Elite
c
(set to 500).
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