16
5 Set up with the display and adjustment module
VEGAPULS 69 • 4 … 20 mA/HART - four-wire
47255-EN-140801
Information:
This is generally recommended, however, for use of the Asset
Management functions it is absolutely necessary. Saving should be
carried out with a very low level.
The function "
Echo curve memory
" allows up to ten individual echo
curves to be stored, for example to detect the measurement behav-
iour of the sensor in different operating conditions.
With the adjustment software PACTware and the PC, the stored echo
curves can be displayed with high resolution and used to recognize
signal changes over time. In addition, the echo curve saved during
setup can also be displayed in the echo curve window and compared
with the actual echo curve.
The following circumstances cause interfering reflections and can
influence the measurement:
•
High sockets
•
Vessel installations 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 a low 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]
.
Additional adjustments -
False signal suppression
