Vega VEGABAR 51 Operating Instructions Manual page 40

6 Set up with the indicating and adjustment module PLICSCOM
Linearisation curve
Copy sensor data
40
3
Confirm with [OK] and move to the menu overview with [ESC].
The span adjustment is finished.
Information:
For an adjustment with pressure, simply enter the actual measured
value indicated at the bottom of the display.
If the adjustment ranges are exceeded, the message "Outside
parameter limits" appears. The editing procedure can be aborted with
[ESC] or the displayed limit value can be accepted with [OK].
A linearization is necessary for all vessels in which the vessel volume
does not increase linearly with the level - e. g. in a horizontal cylindrical
or spherical tank - and the indication or output of the volume is
required. Corresponding linearization curves are preprogrammed for
these vessels. They represent the correlation between the level
percentage and vessel volume. By activating the appropriate curve,
the volume percentage of the vessel is displayed correctly. If the
volume should not be displayed in percent but e.g. in l or kg, a scaling
can be also set in the menu item "Display".
Linearisation curve
linear
Enter the requested parameter via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
Caution:
Note the following, if VEGABAR 51 is used as part of an overfill
protection system according to WHG:
If a linearisation curve is selected, the measuring signal is no longer
compulsorily linear proportional to the level. This must be taken into
consideration by the user, particularly when adjusting the switching
point on the level switch.
This function enables reading out parameter adjustment data as well
as writing parameter adjustment data into the sensor via the indicating
and adjustment module. A description of the function is available in the
operating instructions manual "Indicating and adjustment module".
The following data are read out or written with this function:
Measured value presentation
l
Adjustment
l
Damping
l
Linearisation curve
l
Sensor-TAG
l
VEGABAR 51 • Profibus PA