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To do this, place the glass fibre pen on the desired area and carefully polish the object under
light pressure until a color difference is visible. Then place the probe tip on the polished area. If a
testing object is measured with the CaratScreenPen, also slight discolorations may remain on the
object. This can be observed especially on objects with a very high silver content (black spot) or
copper content (copper-colored spot). The discoloration is caused by the electrochemical
measurement process of the CaratScreenPen. You can polish the discoloration with the glass
fibre pen and thus remove it. Please keep this in mind when measuring mint or representative
objects and ideally measure in inconspicuous places. Especially with supposed 8 or 9 carat
objects, it is almost essential to clean the desired measuring area with glass fibre pen
beforehand. If the result deviates from the hallmarking on the object or if the measurement
result is output in one of the transition ranges, it is advisable to use the glass fibre pen and
perform another measurement.
Calibrating the device:
Regular calibration is necessary to ensure accurate measurement results!
Display
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Description
You can access the calibration mode either via the
main menu (select "Calibration") or in the
measuring mode via "CAL". Before each use and
after each restart, the device must be calibrated
with the integrated calibration piece ③ made of
14 carat (585) red gold.
Pre-treatment of the calibration piece with the
glass fibre pen is important to obtain an optimal
result. Oxide layers and other impurities could
falsify the calibration and lead in the following to
incorrect results. Therefore, clean the calibration
piece with the glass fibre pen before each
calibration. It is also advisable to wipe the
calibration piece with a soft, damp cloth after
polishing. Please always carry out these steps, even
if you do not directly notice any impurities on the
surface.
Make sure that the probe pen is inserted correctly
and all the way into the socket ④. Now you can
place the probe tip as vertically as possible on the
calibration piece. Calibration starts automatically
(figure on the upper left). Keep the tip on the
calibration piece until the blue-gray progress bar
has run through. If calibration is successful, a green
bar appears with the output "OK" (figure on the
lower left).
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