Specifications
4.3. Minimum Sample Weight - SQmin
Situation
In laboratories with regulated environment the minimum sample weight needs to be
determined according USP in order to keep measurement uncertainty in an acceptable
limit. Every balance needs to be tested by a qualified person at its place of installation.
The minimum sample weight is depending on the environment conditions and the quality
of the balance. The result needs to be reported and a sticker will be placed on the balance.
Values below this minimum sample are not valid. The absolute minimum for an analytical
balance like Secura224 is 100 mg. Sample containers like flasks, vessels must be tared.
Sartorius Field Service offers the determination of the minimum sample weight according
USP for every balance. Only a few balance models in the market are capable to get the
minimum sample weight programed. For more details ask your local weighing specialist
or use information from the Sartorius Advanced Pharma Competence package.
Advanced
Pharma
Compliance
-^ User Problem
The user is obliged to observe the minimum
sample weight. Measurements or samples
below minimum sample weight are not
valid or allowed to be processed.
Expensive materials and most stringent
quality requirements do not allow
mistakes.
••Sartorius Solution
Sartorius Field Service will program mini-
mum sample weight in Secura. It will be
constantly indicated in the display and
monitored by Secura. Alarm messages
in the display appear if minimum sample
weight is not fulfilled. If Safety level is
set to "High" no data will be printed or
transferred to the printer.
How to Demonstrate
Use small samples below SQmin (shown in the display). Use the sample material
from Secura demo box.
Show user how balance behaves with sample below SQmin:
- If Printer is connected: Printer button is inactiv (white). Print out and data transfer
are not possible.
- Warning symbol, black triangle.
- Reading is not getting black and remains grey.
Exceed the SQmin slowly and observe how displayed information will change.
Use sample material which is in the demo box.
4
Intensity is depending on the settings for "Safety level"
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