General Information; Service Prerequisites - Sartorius Basicplus Manual

Work Area
Measuring and Test Equipment
Warning!
4

General Information

Service Prerequisites

Any persons servicing or working on high-resolution Sartorius Basicplus
Balances should possess the necessary skills and experience, have
successfully completed a service course at the headquarters in Goettingen
and use the auxiliary tools and equipment described on the following page.
Please do not perform any unauthorized repair work!
Do not attempt to repair the weighing system yourself. Defective units must
be repaired by a SARTORIUS Repair Center or sent to the headquarters in
Goettingen. Temperature compensation is only possible in Goettingen!
If you remove the seals (warranty stickers), you will forfeit all warranty
claims.
Optimal Work Area:
Before testing or adjusting the balance, you must make sure that it is set up
under proper ambient conditions, leveled using the level indicator and is
already warmed up. Appropriate ambient conditions for high-resolution
balances are:
– even surface in an area free of vibrations
– room with a constant temperature (± 0.5 K) during weighing
– no direct heat exposure (sunlight, heaters, etc.)
– no drafts (open windows, doors, exhaust fans, vents)
Allow the balance to warm up for at least 2 hours before operation.
If you wish to use the test results for analysis, you must first let the balance
warm up at the place of installation. If you either set up the balance at a
new location or open the housing, you must wait 2 hours before performing
tests or adjustments!
Information on the measuring and test equipment that may be used:
The most important measuring and test equipment are weights.
Selection of the right measuring and test equipment (such as weights) plays a
significant role in testing. As a rule, the test equipment, i.e., the weights
must have an accuracy higher than that of the balance to be checked and, if
necessary, verified.
Only calibrated weights with a calibration certificate may be used for testing
and adjusting the (absolute) linearity or span. To protect calibrated weights,
you should use non-calibrated weights for all other tests (reproducibility, off-
center loading error).
The calibration certificates and documents (verification certificates, test
certificates, certificates) state the nominal mass value of the weight, the
deviation and the uncertainty of measurement.
During every test, calibration or adjustment of a balance, it is important for
you to be informed about the test equipment (the set of weights) :
– Is the accuracy sufficient?
– Is the calibration certificate still valid?
– Is there evidence of any damage ?
Never test or adjust the balance with unsuitable measuring and test
equipment.