Calibration And Adjustment - Sartorius CW3P Operating Instructions Manual

Calibration and Adjustment

Purpose
The accuracy of weighing results must
be carefully controlled. This is achieved
through calibration and adjustment.
Calibration technically means to
determine the difference between
the weighing instrument readout and
the actual weight on the platform to
determine the accuracy. This does
not involve making any changes in
the scale.
Adjustment means to bring a weighing
instrument to the level of accuracy
required for its use.
Configuring Functions for Use of the
Scale in Legal Metrology
Proceed as follows to use the Combics
in legal metrology:
– Block external calibration/adjustment
Preparation:
§ Remove the covering panel on
the left-hand side of the back of
the indicator
§ Move the switch to the left
> Switch on the left:
For legal metrology (factory setting
on scales verified for use in legal
metrology)
> Switch on the right:
External calibration/adjustment
accessible
42
Features
Which of the following features are
available depends on the connected
weighing platform:
– External calibration/adjustment blocked
in verified weighing instruments
– External calibration/adjustment with
the default weight value or standard
weight (not available on verified
scales). Configure in Setup under:
Calibration/adjust-
...
ment: CAL key function
– Specify the weight for external
calibration/adjustment.
Configure in Setup under:
Calibration/adjust-
...
ment: External weight
– Internal adjustment for IS weighing
COM1:
platforms (setting under:
COM2: WP2
or )
– Block the ) key to prevent activation
of the two functions described above.
Configure in Setup under:
Calibration/adjust-
...
ment: CAL key function
– Calibrate first; then adjust automatically
or manually (not verified weighing
instruments). Configure in Setup under:
Calibration/adjust-
...
ment: Cal./adj.
sequence
– Adjustment prompt: flashing
symbol. If more than one weighing
platform is connected, the platform
number is also displayed.
Configure in Setup under:
Calibration/adjust-
...
ment: isoCAL function
– Block external calibration/adjustment.
Configure in Setup under:
Calibration/adjust-
...
ment: Activate ext.
– Elevation and latitude or gravitational
acceleration displayed after
shown when the Combics is switched
on, if these values have been entered.
Configure in Setup under:
Device: Operat.:
Geograph.data
For each of these parameters, the term
Altitud
,
is displayed first (
Gravity
or ) for 1 second, and then
the corresponding value is displayed
continuously until you press ).
Preparation
§ Activate the Setup program:
Press the M key
§ Select Device Parameters:
Press the
§ Select weighing platform 1, "
Press the
$ Select interface 1, "
interface 2, "
which interface is used for the second
platform): Press the
Select weighing platform 2, "
Press the
Calibration/Adjustment
CAL Key Function
o Ext. cal./adjust.: default weight
Cal./adj. Sequence
o Cal. then manual adj.
isoCAL Function
o Off
Activate ext. adj.
o Activated
External Weight
o = factory setting
§ Save settings and exit Setup:
Press the M key or the
CH Scales
WP
– measuring instrument:
Before using the scale as a legal
measuring instrument, you must carry
out an internal calibration operation by
selecting the "Internal Calibration"
function at the place of installation.
– To do so, press and hold the ) key.
During internal calibration, "CI" (for
internal calibration) appears in the
display.
Once the calibration procedure is
adj. complete, a weight will be displayed
automatically.
Cal
is
Latitud
soft key
O
WP1
":
soft key, or
O
COM1
" or
COM2
" (depending on
soft key
O
WP2
":
soft key
O
Ext. cal./adjust.: user-def. weight
Key blocked
Cal. then auto adj.
Adjustment prompt
Deactivated
soft key
oo