Calibration And Adjustment - Sartorius SIWABBP Operating Instructions Manual

Calibration and Adjustment

Purpose
Perform calibration to determine the
difference between the value displayed
and the actual weight on the platform.
Calibration does not entail making
any changes within the weighing
equipment.
During adjustment, the difference
between the measured value displayed
and the true weight of a sample is
corrected, or is reduced to an allowable
level within maximum permissible error
limits.
Configuration for Use in Legal
Metrology
Configuration of the weighing
instrument for use in legal metrology
is set by a switch. The switch is located
on the back of the weighing platform
and covered by a protective cap.
Using a verified scale in legal
metrology in the EU:
The Type-Approval Certificate for
verified scales is only valid for non-
automatic weighing instruments. For
automatic operation with or without
additional, integrated equipment,
please follow the applicable national
regulations for the installation location.
§ Before use in legal metrology, the scale
should be calibrated via the internal
calibration equipment at the installation
location: see the "Internal Calibration"
section in this chapter.
$ The temperature range (°C) listed on
the ID label should not be exceeded
during operation.
For Servicing:
External calibration for verified scales
of accuracy class K and l
– External calibration is blocked in legal
metrology (switch cover is sealed)
– External calibration only possible by
removing the seal
If the seal is broken, the validity of
verification will become void and you
must have your scale re-verified.
Using a verified scale in legal
metrology with internal adjustment
equipment:
§ Before use in legal metrology, the
"internal calibration" function should
be carried out at the installation
location.
Switch
1 -> Service switch
Switch 1 should only be used for
servicing.
2 -> Verification access switch
1
2
Position: right
§ Switch 2 on the right
-> for use in legal metrology
SIW*DCP/AC:
Position: left
§ Switch 2 on the left
-> external calibration/ adjustment
accessible
SIWSDCS:
The function of switch 2 is reversed for
SIWSBBS.
SIW*BBP:
SIW*DCP/AC:
SIWSDCS: SIWSBBS:
SIW*BBP:
SIWSBBS:
Operation
Characteristics
Which of the following features are
available depends on the connected
weighing platform. These features are
configured in the Setup menu:
– External calibration/adjustment blocked
in verified weighing instruments
– External calibration/adjustment with
the default weight value or standard
weight (not available on verified
instruments):
setup
wp-1
1.9.: Calibration/Adjustment
– Specify the weight for external
calibration/adjustment:
setup
wp-1
1.18.: (enter calibration weight)
– Internal adjustment for IS weighing
platforms (configure under: COM1
or unicom WP2)
:
– Block the J key to prevent the use
of the two functions described above:
setup
wp-1
1.9.: Calibration/Adjustment
– Calibrate first; then adjust automatically
or manually (not on verified weighing
instruments):
setup
wp-1
1.10: (calibration/adjustment sequence)
– Flashing W symbol as adjustment
prompt. If more than one weighing
platform is connected, the platform
number is also displayed:
setup
wp-1
1.15.: (calibration prompt)
– Block external calibration/adjustment:
setup
wp-1
1.16.: (external calibration)
Signum 1-2-3
:
43