KERN & SOHN KET-TM - Manual (Page 76)

76 KEN-TM / KET_TM-BA-e-1420
7.9 Adjustment
As the acceleration value due to gravity is not the same at every location on earth, each
display unit with connected weighing plate must be coordinated - in compliance with the
underlying physical weighing principle - to the existing acceleration due to gravity at its
place of location (only if the weighing system has not already been adjusted to the
location in the factory). This adjustment process must be carried out for the first
commissioning, after each change of location as well as in case of fluctuating
environment temperature. To receive accurate measuring values it is also
recommended to adjust the display unit periodically in weighing operation.
The adjustment of this menu item is locked in calibrated weighing systems.
It is not shown on the menu.
To disable the access lock, destroy the seal and actuate the service switch.
For position of service switch see chap. 7.10.
Attention:
After destruction of the seal the weighing system must be re-verified by an
authorised agency and a new verification wire/seal mark fitted before it can
be reused for applications subject to verification.
+
For execution of “adjust weighing system“ see chap. 21.4
7.10 Verification
General introduction:
According to EU directive 2009/23/EC balances must be officially verified if they are
used as follows (legally controlled area):
a) For commercial transactions if the price of goods is determined by weighing.
b) For the production of medicines in pharmacies as well as for analyses in the
medical and pharmaceutical laboratory.
c) For official purpose.
d) For manufacturing final packages.
In cases of doubt, please contact your local trade in standard.
Verification notes:
An EU Qualification Approval is in existence for verified weighing systems. If a balance
is used where obligation to verify exists as described above, it must be verified and re-
verified at regular intervals.
Reverification is carried out according to the relevant national statutory regulations. The
validity for verification of balances in Germany is e.g. 2 years.
The legal regulation of the country where the balance is used must be observed!