14
5 Set up with the display and adjustment module PLICSCOM
VEGAPULS 68 • 4 … 20 mA/HART - four-wire
51905-EN-180222
2
1
3
100%
0%
1 m
(39.37
")
35 m (1378
")
Fig. 7: Parameterisation example, Min./max. adjustment
1 Min. level = max. measuring distance
2 Max. level = min. measuring distance
If these values are not known, an adjustment with the distances of e.g.
10 % and 90 % is possible. Starting point for these distance specifica-
tions is always the sealing surface of the thread or flange. You can find
specifications on the reference plane in chapter "
Technical data
". The
actual level is calculated on the basis of these settings.
The actual product level during this adjustment is not important,
because the min./max. adjustment is always carried out without
changing the product level. These settings can be made ahead of
time without the instrument having to be installed.
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
Service - False signal
suppression
