Goldanalytix GoldScreenBox Instruction Manual page 9

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measuring scale,
Interpretation of the Results).
The device is now ready for measuring: Place
the test object (e.g. the 1 ounce gold coin with
the stamping Au 999) in the center of the
sensory field This is especially important
②.
for small objects (< ¼ ounce, see "Evaluation
and Interpretation of the Results").
The measured conductance is immediately
displayed numerically in Megasiemens per
meter (MS/m) next to "VAL." and is shown
graphically as a black cursor in the coloured
scale. The spot of the cursor shows, if the
object is in the tolerance range. When we test
a 1 ounce gold coin, the result could look
similar to the screen on the left. This means
that the conductance of the object is in the
tolerance range for the selected alloy.
Please note: After switching on, the device
might show a "VAL" which does not remain
stable within the first five minutes of
operation (whereas a certain variance in the
range of ± 0.3 MS/m is usual), but declines
during this "warming-up time" while the
testing object is placed on the device. This
change can be several digits. During this time
the device cannot be calibrated. After an
operating time of five minutes this effect is no
longer observable and the values remain
stable.
For a fake coin (e.g. made of a tungsten alloy)
the result might look like the picture on the
left.
Your GoldScreenBox gets calibrated precisely
before shipping. This means the GSB does not
need to be calibrated by the user prior to the
first measurement. If you need to perform a
calibration you can select calibration in the
menu. Possible reasons could be wrong values
[Value in yellow or red area, even though
object is propably not fake] or an elevated
temperature in the measuring environment.
see Evaluation and
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