Sartorius Factory Series, Operating Instructions Manual, Page: 69 / 213

69
Operating the Scale: FC
Calibration/Adjustment
“isoTEST”*
Purpose
Calibration is the determination
of the difference between the weight
readout and the true weight (mass)
of a sample. Calibration does
not entail making any changes within
the scale.
Adjustment is the correction of this
difference between the measured
value displayed and the true
weight (mass) of the sample, or the
reduction of the difference to an
allowable level within maximum
permissible error limits.
Using Verified Scales as Legal
Measuring Instruments in the EU**:
Before using your scale as
a legal measuring instrument, you
must perform “internal calibration”
at the place of installation after
the warmup period.
* isoTEST = TEST in the U.S.
and Canada
** including the Signatories of
the Agreement on the European
Economic Area
Available Features
You can start the isoTEST function at
the press of a key to check a scale
used as measuring, inspection and
test equipment at any time. The scale
is calibrated and any deviation is
displayed. Press the
Start
soft key
to start adjustment. If you do not wish
to have the scale adjusted, press the
End
soft key to cancel the isoTEST.
Your scale can be calibrated
externally (Scale menu: CAL/isoTST
key function; menu item
Ext.
cal./adj.;factory-def.
wt.
or
Ext. cal./adj.;
user-defined wt.
) or
internally (
Internal
cal./adjustment
).
External calibration can
be performed
– using a pre-set weight value
Ext. cal./adj.;
factory-def. wt.
, or
– with a user-defined weight
Ext. cal./adj.;
user-defined wt.
The adjustment can be performed
– automatically following
calibration:
Cal., then
auto adjust.
or
– if desired, the adjustment
operation can be started manually
after calibration:
Cal., then
manual adjust
You can also configure whether the
calibration mode
– will be activated according
to the specific setting
(external/internal) or
– can be selected by the user after
pressing the
isoTST
soft key:
Selection mode
.
You can have the scale automatically
display an adjustment prompt after
a certain time interval has elapsed
since the last calibration/adjustment
or when the ambient temperature
changes by a defined amount.
You can configure the scale to
perform calibration and adjustment
automatically (isoCAL) when the
pre-set time(s) and/or temperature
limit is reached:
On and
reset application
and
On without resetting
application
.
You can have the calibration/
adjustment results documented on an
ISO/GMP-compliant printout or on
a block printout with up to 50
adjustment sequences; see pages 158
and 162.
Factory Settings
Calibration/adjustment mode:
Selection mode
Calibration/adjustment sequence:
Calibrate, then auto
adjust
Automatic calibration/adjustment
function:
On without
resetting app.
Start automatic adjustment:
isoCAL
Generate GLP/GMP-compliant
record:
Automatic if GLP
is selected
External Calibration in Verified
Scales of Accuracy Class
K
– External calibration is blocked
when the scale is used in legal
metrology
> External calibration can only
be released after removing the
verification control seal, in which
case the validity of the verification
becomes void and the scale must
be re-verified
– External calibration can now
be performed