6
Disclaimers, Exclusions and Limitations of Liability
sample is tested, are controlled as these interferences
could impact the testing results. It is important to always
clean the probe tip, probe pen and testing area before
testing and in between tests, to ensure no residue testing
liquid is left.
Calibration is automatically prompted when the device
starts up and accurate calibration will ensure the tester
gives consistent results. It is also a good standard
operating procedure to check and perform the calibration
procedure periodically during extended periods of testing
or you have been repeatedly getting inconsistent results.
The PKT is not able to detect gold plated jewelry due to
the various plating thickness by different plating jewelry
manufacturers. You should always check the karat stamp,
if available, on the gold sample you are testing so you
can compare it to the results from the PKT. You should
also evaluate the color of the metal; feel the weight of the
jewelry, etc to assess other obvious signs if the sample is
of genuine gold before testing.
During testing, do conduct tests with the PKT at different
parts of the gold item or jewelry as the gold purity may
differ slightly at different points.
If there are discrepancies in the test results, you are
strongly advised to re-calibrate your PKT, clean the
jewelry and repeat the testing at multiple points on the
jewelry or alternatively conduct other supporting gold tests
such as testing gold density or using ultrasonic or X-ray
fluorescence, etc. in conjunction with PKT.
In general, the PKT has an accuracy of +/- 2K, except for
platinum and non-gold where it has 95% accuracy. The
accuracy for higher karats of gold (i.e. 18K and 22K) may
deviate to +/- 4K.
