VEGA VEGAFLEX 81 Profibus PA - Manual (Page 36)

36
6 Set up with the display and adjustment module
VEGAFLEX 81 • Profibus PA
44217-EN-130910
Dielectric constant - upper medium
In this menu item, you can define the type of medium (product).
Max. adjustment
In this menu item, you can enter the max. adjustment for the level.
Enter the appropriate distance value in m (corresponding to the
percentage value) for the full vessel. The distance refers to the sensor
reference plane (seal surface of the process fitting). Keep in mind that
the max. level must lie below the dead band.
Min. adjustment
In this menu item, you can enter the min. adjustment for the level.
Enter the suitable distance value in m for the empty vessel (e.g.
distance from the flange to the probe end) corresponding to the per-
centage value. The distance refers tot he sensor reference plane (seal
surface of the process fitting).
Max. adjustment - Interface
Carry out the max. adjustment for the interface.
To do this, enter the percentage value and the suitable distance value
in m for the full vessel.
Min. adjustment - Interface
Carry out the min. adjustment for the interface.
To do this, enter the percentage value and the suitable distance value
in m for the empty vessel.
Linearization
A linearization is necessary for all vessels in which the vessel volume
does not increase linearly with the level - e.g. a horizontal cylindri-
cal or spherical tank, when 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.
The linearization applies for the measured value indication and the
current output. By activating the suitable curve, the percentage vessel
volume is displayed correctly.
Interface measurement
Linearization