Precisa 350-8182-000, Operating Instructions Manual

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390 System Settings
Precisa Gravimetrics AG 51
Note:
The internal clock is equipped with a backup battery, which guarantees perfect functioning for
several years. If the time or dates are incorrect after a cold start, in most cases this indicates the
end of the lifespan of the backup battery. This must be replaced by qualified personnel.
6.7 Minimal Sample Weight and Quality Management,
MSW
With the minimum wine scale MWS, weighing can always be ensured in accordance with required
QS guidelines such as GLP, GMP or USP (United States Pharmacopeia).
By activating the minimum weight (MSW,) the minimum weight can be entered for several tare
ranges.
 Minimum sample weight use or not
 Minimum weight i [g] is the minimum weight that is required in tare range i
 Tare range i (max) [g] is the maximum tare value below which the minimum weight i is
used
 Expiry date when a new check of the minimum sample weight according to your QM system
is due. We certainly recommend checking once a year.
In many applications only very small quantities are used, thus, only a small part of the balance's
weighing capacity is used. The smaller the used sample quantity, the greater the relative
uncertainty of the measurement. Therefore the minimum weight which is required is determined on
the basis of the QM criteria and of the statistical data from repeated weighing procedures. The