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SQmin Function
Purpose
To display the allowable minimum sam-
ple quantity “SQmin” in accordance
with the United States Pharmacopeia
(USP). According to USP guidelines, the
uncertainty of measurement may not
exeed 0.1 % of the sample quantity
when substances are weighed with the
highest degree of accuracy for volume
determination. This additional function
ensures that weight results lie within
defined tolerance limits corresponding
to the requirements of your quality
assurance system.
Features
– The service technician will determine
the required minimum sample quantity
based on your quality assurance
requirements at the location where the
balance is set up. Afterwards, he will
store this value in the balance. This
setting cannot be changed by the user.
Once he has finished programming the
balance, the service technician will
prepare a “Test in Accordance with the
USP” certificate, on which he will record
the measurements and the minimum
sample quantity for the balance. If you
use the SQmin function, you can be
sure that the weight results will
correspond to the specifications on the
certificate and, therefore, USP
guidelines.
– Displaying the minimum sample
quantity:
The value is shown in the next line for
4 seconds after the “SQmin” soft key is
pressed
or
the value is constantly displayed in
place of the bar graph.
– This function can be assigned to either
the fourth or fifth soft key from the
right (F4 or F5). The soft key should
then be labeled with
SQmin.
– If the minimum sample quantity has not
been reached:
The
SQmin soft key will flash inversely.
Weights will be marked with an asterisk
“*” in the printout.
– Header of GLP-complicant records: The
minimum sample quantity entered for
“SQmin” can be printed out in addition.
Factory-set parameters
Display:
Text display
Print in GLP header: Off
Preparation
§ Turn on the balance: press e
> The Sartorius logo is displayed
§ Select Extra function (F4) or Extra function (F5) in the Setup menu: press s
§ Select
Application parameters: press the q soft key twice,
then press the O soft key once
§ Select
Extra function (F4) or Extra function (F5):
press the q soft key repeatedly, then press the O soft key
§ Select
SQmin.
§ Confirm
SQmin.
SQmin Display ο Text display
Bar graph
Print in ο Off
GLP header On
ο = Factory setting
See also “Application Parameters (Overview)” in the chapter entitled “Configuring
the Balance”
§ Store the settings and exit the Setup menu: press the
oo soft key.
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