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6 Set up with the display and adjustment module PLICSCOM
VEGAPULS 61 • Profibus PA
28444-EN-141215
required. Corresponding linearisation curves are preprogrammed for
these vessels. They represent the correlation between the level per-
centage 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 parameters via the appropriate keys, save your
settings and jump to the next menu item with the
[->]
key.
Caution:
Note the following if the VEGAPULS 61 with corresponding approval
is used as part of an overfill protection system according to WHG
(Water Resources Act):
If a linearisation curve is selected, the measuring signal is no longer
necessarily linear to the filling height. This must be considered by the
user especially when adjusting the switching point on the limit signal
transmitter.
High sockets or vessel installations, such as e. g. struts or agitators as
well as buildup and weld joints on the vessel walls, cause interfering
reflections which can impair the measurement. A false echo storage
detects and marks these false echoes, so that they are no longer
taken into account for the level measurement. A false echo memory
should be created with low level so that all potential interfering reflec-
tions can be detected.
False signal suppression
Change now?
Proceed as follows:
1. Move from the measured value display to the main menu by
pushing
[OK]
.
2. Select the menu item "
Service
" with
[->]
and confirm with
[OK]
.
Now the menu item "
False signal suppression
" is displayed.
3. Confirm "
False signal suppression - Change now
" with
[OK]
and
select in the below menu "
Create new
". Enter the actual distance
from the sensor to the product surface. All false signals in this
area are detected by the sensor and saved 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.
False signal suppression
