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IMPORTANT INFORMATION:
We recommend filing the testing objects before measurement. The CaratScreenPen analyzes
only the surface of the testing objects. A penetrating measurement, i.e. an examination of the
core of the respective objects is only possible if you file the object. But even without filing, many
fakes can be detected and cheap, only lightly gold-plated costume jewellery can be distinguished
from valuable gold jewellery.
The pen of the CaratScreenPen contains an aqueous electrolyte solution with a pH value of 5.8
(slightly acidic). Due to the limited volume, the pen has a certain lifetime. Below a certain liquid
level, a reliable measurement can no longer be guaranteed. Should you notice deviating values
or errors during calibration, you should replace the pen: This is usually only the case after circa
4000-5000 measurements.
Please note the following special cases. Detailed information on the individual special cases can
be found on our website at www.gold-analytix.com/caratscreenpen.
Be especially careful with jewellery without a hallmark. Objects should always be hallmarked to
the correct gold content. Therefore, unmarked objects are often fakes or only lightly gold-plated
costume jewellery. In addition, you have no indication of the alloy or the gold content of the
object. Therefore, be particular careful when interpreting the measurement results. For
jewellery without a hallmark, we recommend intensive treatment with the glass fibre pen or
filing of the object. If the CaratScreenPen shows a gold content in the range of 21-24 K, it is
probably only a gold coating and not an object made of fine gold. But also with unmarked
objects with a lower carat output, you should be careful and take several measurements. Please
keep in mind that also marked objects can of course be under-alloyed!
Another special cased are objects which below their surface are made of a gold ally and are also
hallmarked accordingly, but have been plated with a thin gold layer for aesthetic reasons. This
often happens, for example, with 585 gold coins – by polishing those objects with the glass fibre
pen, you can remove the superficial layer and thus quickly and easily determine the "true" alloy.
Please note, however, that the color differences between the treated area and the surrounding
area are sometimes very noticeable.
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After the measurement, the result remains for a
few seconds. Then the screen display changes back
to "READY". However, you do not have to wait, but
can directly test the next object once the result is
logged in.
In the lower section of the display, you can either
return to the main menu by pushing the control
knob or switch directly to calibration via "CAL".
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