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SQmin Function
Purpose
To display the allowable minimum sample quantity “SQmin” (sample quantity minimum)
in accordance with the United States Pharmacopoeia (USP). According to USP guidelines,
the uncertainty of measurement may not exceed 0.1% of the sample quantity when
substances are weighed with the highest degree of accuracy for volume determination.
This additional function ensures that weighing results lie within defined tolerance limits
corresponding to the requirements of your quality assurance system.
System Requirements
The scale must be set up by a service technician to be able to use the SQmin function.
The technician will determine the permitted minimum sample quantity and set this on
your balance using your QA system's guidelines. He will document this setting via a
“Weighing module test as per USP" certificate in which the measurements and min.
sample quantity are logged. The SQmin function ensures that the weighing results
correspond to USP guidelines. These SQmin settings cannot be changed by the user.
Features
– Displaying the minimum sample quality: The value is displayed in the text line for
4 seconds after pressing the k key.
– If the minimum sample quantity has not been reached: The
ksymbol
is displayed and weight values are marked with a “!" in the printout.
– GLP header: The minimum sample quantity entered for SQmin can be included on the
printout.
Operation
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