PRS/PRJ/ARS/ARJ-BA-def-0622 105
6.7 Mains supply
Electric power supply is by means of the external power adaptor. The printed voltage
level must comply with the local voltage.
Only use original KERN power adaptors. The use of other makes is subject to approval by
KERN.
6.8 Connecting peripheral devices
The balance must be disconnected from the mains before connecting or disconnecting
additional equipment (printer, PC) to or from the data interface.
Only use KERN accessories and peripheral devices with your balance as these have
been specially adapted to function best with your balance.
6.9 Commissioning
A warm up time of 1 hour after switching the balance on will stabilise the measuring
values.
The accuracy of the balance depends on the local gravity.
Please be sure to observe the information in the chapter on Calibration.
6.10 Calibration
Since the Earth's gravity is not the same everywhere, each balance must – in accordance
with the underlying physical weighing principle – be adjusted to compensate for the
gravity at each location. This adjustment process, known as “calibration”, must be carried
out on commissioning and after each subsequent relocation. It is also advisable that you
adjust the balance periodically during weighing operation in order to obtain exact
measured values.
NOTE
The balance must be calibrated on commissioning and after every relocation.
If you work in accordance with “Good Laboratory Practice GLP”, observe the prescribed
intervals between calibrations (adjustments).
Adjusting the calibration is carried out in the configuration menu. Depending on the model
of balance, this may be done externally, internally or automatically (see Chapter 8.6
“Calibration functions”).
Adjustment should be carried out with the recommended adjusting weight (KERN
ARS/PRS, see Chapter 1 „Technical Data“). The adjustment can also be carried out with
different adjusting weights, but not ideal from a metrological point of view.
Using the “Intelligent Calibration Mode” (ICM) the balance can itself determine the size of
the calibration weight, which enables an exact calibration with different weights (in 10 g,
50 g, 100 g and 500 g steps, depending on model).
You can find information about test weights on the Internet: http://www.kern-sohn.com
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