Goldanalytix GOLDSCREENSENSOR Instruction Manual page 32

Special case Krugerrand silver: Our tests have shown that the .999 silver coins result of about 55
and 59 MS/m are also an indication of a genuine material. This also applies for the "Owl of
Athens" and some "Tokelau" coins.
This effect is particularly strong for silver coins with a purity of less than 958. This is why that,
especially for typical commemorative silver coins, it is not possible to establish the silver content
with the GoldScreenSensor. It rather shows you that the conductivity is plausible for silver (>30
MS/m) and the dimensions and the weight have to be examined very thoroughly.
Medals and jewellery can not be tested successfully by measuring the conductivity. Even if the
piece is completely contiguous and covers the entire measuring field, the alloy is not known in
detail. In the best case you know the gold content, however all other components of the alloy
will have unforeseeable influences on the conductivity.
Particularities of the 5 DM commemorative coins of the years from 1979 (Otto Hahn) to 1986
(Frederick the Great): This series of commemorative coins has a weight of 10.0 g (previous years
had 11.2 g) and consists of a copper-nickel alloy with nickel core (previous years had silver 625).
These coins show a conductance of about 2.4 MS/m (nominal value of silver 625 is of about 47.0
MS/m).
The GoldScreenSensor is a perfect device for the establishment of the conductivity values of
metals and genuine precious metals - but in the end, you are the one responsible for your final
transactions.
We therefore do not assume any responsibility for any financial losses that result from the use
of the GoldScreenSensor.
An absolute secure determination can only be provided by a total chemical analysis. The
GoldScreenSensor can only show you, which conductivity value the tested material has and
which metal / which alloy it MIGHT be. We recommend combining several methods for
maximum certainty. Please also have a look at our website www.gold-analytix.com/knowledge.
Jewellery and other precious metal objects with uneven surfaces - unlike coins and ingots – can
not be analysed by the GoldScreenSensor. A correct result is only obtained when the
measurement circle is completely covered by the object. If you want to test smaller objects, we
recommend the Goldanalytix GoldScreenPen and for the jewellery, we recommend the
CaratScreenPen because it allows establish the gold content of jewellery alloys.
30