Siemens SITRANS LG250 Operating Instructions Manual page 27

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 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.
False signal suppression
High sockets and internal vessel installations cause interfering reflec-
tions and can influence the measurement.
A false signal suppression detects, marks and saves these false
signals so that they are no longer taken into account for the level and
interface measurement. We generally recommend carrying out a false
signal suppression to achieve the best possible accuracy. This should
be done with the lowest possible level so that all potential interfering
reflections can be detected.
Enter the actual distance from the sensor to the product surface.
All interfering signals in this section are detected by the sensor and
stored.
The instrument carries out an automatic false signal suppression
as soon as the probe is uncovered. The false signal suppression is
always updated.
PBD-51041056 SITRANS LG250 - Operating Instructions 27