Calibration And Adjustment - Sartorius combics 1 Operating Instructions Manual

Operation

Calibration and Adjustment

Purpose
The accuracy of weighing results must
be carefully controlled. This is achieved
through calibration and adjustment.
Perform calibration to determine the
difference between the value displayed
and the actual weight on the weighing
instrument. Calibration does not entail
making any changes within the weighing
instrument.
The adjustment procedure actually elimi-
nates the difference between the readout
and the actual weight, or reduces it to
a level within the permissible tolerance
limits.
Example
External calibration and manual adjustment with default weights
Setup menu settings:
1.9.1; 1.10.2
(
)
> 2 sec
20
Features
Which of the following features
are available depends on the weighing
instrument:
– External calibration/adjustment with
the default weight value or standard
weight (1.9.1) (not available on verified
instruments)
– External calibration/adjustment with
a user-defined weight (1.9.3) (not
available on verified instruments)
– Internal calibration/adjustment for
IS platform (1.9.4), WP2 only
– Block the ) key to prevent use of the
two functions described above (1.9.10)
– Calibrate first; then adjust automatically
(1.10.1) (not available on verified
instruments)
– Calibrate, then prompt for manual input
of adjustment command (1.10.2)
– Calibration prompt: flashing W symbol
(1.15.2). If more than one weighing
instrument is connected, the instrument
number is also displayed.
– Block external calibration/adjustment
(1.16.2)
Unload and zero the weighing instrument
Start calibration (e.g., when calibration prompt is flashing: W)
The following is displayed for 2 seconds
You are prompted to place the required weight on the weighing instrument
(e.g., 10 kg)
– Display altitude and geographical
latitude or acceleration of gravity after
CAL is shown at the beginning of the
calibration procedure (menu item
8.12.2). These values are shown only if
they have been entered in the service
menu and activated.
For each of these parameters, the term
is displayed first (Altitud, Latitud
or Gravity) for 1 second, and then
the corresponding value is displayed
continuously until you press ).
Note
On verified weighing instruments, the
external calibration/adjustment func-
tion is available only when the menu
access switch is in the "open" position,
which entails breaking the verification
seal (refer to the chapter entitled
"Service"). The equipment must be re-
verified after the seal has been broken.