VEGA VEGAFLEX 66 (-110…+400°C) Foundation Fieldbus - Manual (Page 31)

ment. 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 empty vessel so that all potential interfering reflections will
be detected.
Probes in coax version require no gating out of false echoes
since they are not influenced by false reflections.
Gating out of false signals
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 false signal. The filling level would then no longer be
detectable in this area.
A linearization is necessary for all vessels in which the vessel
volume does not increase linearly with the level - e. g. with a
cylindrical or spherical tank - and the indication or output of the
volume is required. Corresponding linearization curves are
preprogrammed for these vessels. They represent the
correlation between the level percentage 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
VEGAFLEX 66 • Foundation Fieldbus 31
6 Set up with the indicating and adjustment module PLICSCOM
32765
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EN
-080716