Purpose
Calibration is the determination of
the difference between the weight
readout and the true weight (mass) of
a sample. Calibration does not entail mak-
ing any changes within the balance.
Adjustment is the correction of this
difference between the measured value dis-
played and the true weight (mass) of
the sample, or the reduction of the
difference to an allowable level within
maximum permissible error limits.
Linearization is the procedure used
to eliminate the deviation from weight
readout plotted on the balance’s ideal
characteristic calibration curve and the
actual weight readout. In other words, lin-
earization reduces the amount of error of a
weight displayed to its maximum
permissible error limits. The ideal
characteristic curve is a straight line
plotted between zero load and maximum
load.
Using Verified Balances as Legal
Measuring Instruments in the EU*:
Before using your balance as a legal
measuring instrument, you must perform
“internal calibration” at the place of
installation after the warmup period.
* including the Signatories of the
Agreement on the European Economic
Area
47
Calibration, Adjustment, Linearization
Features
You can 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
Cal soft key:
Selection mode.
Your balance can be calibrated external-
ly: (Balance menu: CAL key function;
menu item
Ext. cal./adj.;
factory-def. wt. or
Ext. cal./adj.;
user-defined wt.;
or internally: (
Internal
cal./adjustment).
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
Linearization is performed if you
have selected
Internal
linearization in the Setup
menu or you have set this using the
Selection mode.
You can have the balance 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 also configure the balance to
perform calibration and adjustment
automatically (isoCAL) when the pre-set
time and/or temperature limit is reached
On and reset
application and On
without resetting app.
(see also page 55).
You can have the calibration/adjustment
results documented in an ISO/GLP-
compliant printout; see page 131.
Factory Settings of the Parameters
Calibration/adjustment mode:
Selection mode
Calibration/adjustment sequence:
Calibrate, then auto
adjust
isoCAL function: On without
resetting application
Start automatic adjustment: isoCAL
Print GLP/GMP calibration/adjustment
record:
Automatic if GLP is
selected
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