Operation
47
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.
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 load this to your
scale using the guidelines of your
QA system. These settings cannot be
changed by the user. 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.
Characteristics
– Displaying the minimum sample
quantity:
The value is shown in the text line for
4 seconds after the k key is pressed.
– If the minimum sample quantity has
not been reached:
Symbol displayed: The ! symbol 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.
Parameter Factory Settings
Display: SQmin Off
Print in GLP header: Off
SQmin Display * No
Yes
Print in * No
GLP header Yes
* = Factory setting
See also the chapter on “Configuration: Application Parameters (Overview)"
§ Save the settings with the ) key and exit Setup: Press the ( key several times.
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