Monitoring The Test Substances - KERN WTB Operating Manual

WTB-BA-e-0913
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4.4

Monitoring the test substances

The metrology features of the balance and any possible available adjusting weight must be
checked at regular intervals within the scope of quality assurance. For this purpose, the
answerable user must define a suitable interval as well as the nature and scope of this check.
Information is available on KERN's home page (www.kern-sohn.com) with regard to the
monitoring of balance test substances and the test weights required for this. Test weights and
balances can be adjusted quickly and at a reasonable price in KERN's accredited DKD calibration
laboratory (return to national normal).
4.5 Verification
General:
According to the EU guideline 90/384/EEC balances must be verified officially if they are to be used
as follows (legally regulated area):
a) For commercial transactions if the price of goods is determined by weighing
b) For the production of medines in pharmacies as well as for analyses in the medical
and pharmaceutical laboratory
c) For official purposes
d) For the production of finished packages
In case of doubt, please contact your local office of weights and measures.
Verification information: (see chapter 9.3 Declaration of conformity)
An EU qualification approval is available for those balances marked as appropriate for verification
in the technical data. In the event that the balance is applied in an area subject to verification as
described above, it must be officially verified and re-verified at regular intervals.
Re-verification of a balance is carried out in compliance with the respective legal provisions of the
states. The term of verification validity for balances in Germany, for example, is normally 2 years.
The legal provisions of the country of use are to be observed.