Siemens SITRANS LG260 Operating Instructions Manual page 27

Damping
Linearisation
PBD-51041061
All interfering signals in this section are detected by the sensor and
stored.
Keep in mind that with covered probe only false signals in the uncov-
ered area of the probe are detected.
Note:
Check the distance to the product surface, because if an incorrect
(too large) value is entered, the existing level will be saved as a false
signal. The level would then no longer be detectable in this area.
If a false signal suppression has already been created in the sensor,
the following menu window appears when selecting "False signal
suppression":
The instrument carries out an automatic false signal suppression
as soon as the probe is uncovered. The false signal suppression is
always updated.
The menu item "Delete" is used to completely delete an already cre-
ated false signal suppression. This is useful if the saved false signal
suppression no longer matches the metrological conditions in the
vessel.
To damp process-dependent measured value fluctuations, set an
integration time of 0 ... 999 s in this menu item.
The default setting is a damping of 0 s.
A linearisation 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 linearisation curves are preprogrammed
for these vessels. They represent the correlation between the level
percentage and vessel volume.
The linearisation applies to the measured value indication and the
current output. By activating the appropriate curve, the volume per-
centage 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".
SITRANS LG260 - Operating Instructions
27