16
5 Set up with the display and adjustment module
VEGAPULS 61 • Profibus PA
47106-EN-161104
The following circumstances cause interfering reflections and can
influence the measurement:
•
High sockets
•
Vessel internals such as struts
•
Agitators
•
Buildup or welded joints on vessel walls
Note:
A false signal suppression detects, marks and saves these false
signals so that they are no longer taken into account in the level
measurement.
This should be done with the lowest possible level so that all potential
interfering reflections can be detected.
Proceed as follows:
1. Select with
[->]
the menu item "
False signal suppression
" and
confirm with
[OK]
.
2. Confirm again with
[OK]
.
3. Confirm again with
[OK]
.
4. Confirm again with
[OK]
and enter the actual distance from the
sensor to the product surface.
5. All interfering signals in this section are detected by the sensor
and stored after confirming with
[OK]
.
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 saved in the sensor,
the following menu window appears when selecting "
False signal
suppression
":
Additional adjustments -
False signal suppression
