Vega VEGAPULS 68 - Page 16

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5 Set up with the display and adjustment module
VEGAPULS 68 • Two-wire 4 … 20 mA/HART
47165-EN-210621
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Agitators
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Buildup or welded joints on vessel walls
Note:
A false signal suppression detects, marks and saves these false
signals to ensure that they are ignored in the level measurement.
This should be done with the lowest possible level so that all potential
interferingreectionscanbedetected.
Proceed as follows:
1. Select with [->] the menu item " False signal suppression" and
conrmwith[OK].
2. Conrm3-timeswith[OK] and enter the actual distance from the
sensor to the product surface.
3. All interfering signals in this range are detected by the sensor and
storedafterbeingconrmedwith[OK].
Note:
Check the distance to the medium 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":
Delete: An already created false signal suppression will be com-
pletely deleted. This is useful if the saved false signal suppression no
longer matches the metrological conditions in the vessel.
Extend:isusedtoextendanalreadycreatedfalsesignalsuppres-
sion. This is useful if a false signal suppression was carried out with
too high a level and not all false signals could be detected. When
selecting " Extend", the distance to the medium surface of the created
false signal suppression is displayed. This value can now be changed
andthefalsesignalsuppressioncanbeextendedtothisrange.