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BA_078_en_10.01 Level transmitter PASCAL Ci4 LEVEL
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Figure 22: Automatic sorting and adjusting control points
6.5.4
"Adjustment" menue
The following functions are available for the adjustment:
Menue entry
Description
Zero point
Set device at ambient pressure to zero (0 bar rel)
(not with abso-
lute pressure devices)
Position correction
Correct zero point error due to installation position
(not with abso-
lute pressure devices)
Lower adjustment
Offset correction with applied reference pressure
Upper adjustment
Span correction with applied reference pressure
Table 12: "Pressure Adjustment" menue
For devices with differential pressure cell (type CI4x4x) you can also correct the zero point
of the static pressure measurement. For these devices there is an additional menue entry
called "Zero point p
st
".
6.5.4.1
Zero-point correction
The zero-point correction requires a non-pressurized pressure port e.g. during calibration
in the lab. When executing this function the applied pressure will be interpreted as zero bar
relative pressure.
The zero point correction results in an offset of the whole characteristic curve. Therefore it
is a special case of the lower adjustment (see below).
6.5.4.2
Position correction
Using the function "Position correction", you can correct the offset error due to the installa-
tion position independent of the zero-point offset.
In the corresponding submenue, you will find the following entries:
Menue entry
Description
Pos.corr. on/off
Activate/deactivate position correction
Set pos. corr.
Correct position error at ambient pressure
Table 13: "Position Correction" submenue