VEGA VEGABAR 65 Profibus PA - Manual (Page 38)

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. with a 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 65 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:
l Measured value presentation
l Adjustment
l Damping
l Linearisation curve
l Sensor-TAG
l Displayed value
l Scaling unit (Out-Scale unit)
l Positions after the decimal point (scaled)
l Scaling PA/Out-Scale 4 values
l Unit of measurement
l Language
The following safety-relevant data are not read out or written:
Linearisation curve
Copy sensor data
38 VEGABAR 65 • Profibus PA
6 Set up with the indicating and adjustment module PLICSCOM
28253
-EN
-090522