Sqmin Function - Sartorius LA Reference Series Operating Instructions Manual

SQmin Function

Purpose
To display the allowable minimum
sample 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
SQmin
then be labeled with
– If the minimum sample quantity has not
been reached:
SQmin
The 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
Text display
Display:
Off
Print in GLP header:
106
Preparation
Turn on the balance: press e
> Sartorius logo is displayed
Select Extra function (F4) or Extra function (F5) in the Setup menu: press o
Application parameters
Select
then press the O soft key once
Extra function (F4)
Select
press the q soft key repeatedly, then press the O soft key
SQmin
Select
SQmin
Confirm
SQmin
ο = Factory setting
See also "Application Parameters (Overview)" in the chapter entitled "Configuration"
Store the settings and exit the Setup menu: press the
.
or
.
.
ο Text display
Display
ο Off
Print in
GLP header
: press the q soft key twice,
Extra function (F5)
Bar graph
On
soft key.
oo
: