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 dened 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“ certicate 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.
Operating Instructions Combics Complete Scales 91
Operation
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