VEGA VEGASON 62 Foundation Fieldbus - Manual (Page 28)

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6 Set up with the display and adjustment module PLICSCOM
VEGASON 62 • Foundation Fieldbus
28791-EN-130417
Apart from the medium, the vessel shape can also influence the
measurement. To adapt the sensor to these measuring conditions,
this menu item offers different options depending on whether liquid
or bulk solid is selected. With "Liquids" these are "Storage tank",
"Stilling tube", "Open vessel" or "Stirred vessel", with "Solid", "Silo" or
"Bunker".
Vessel form
Storage tank
Enter the requested parameters via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
To suppress fluctuations in the measured value display, e. g. caused
by an agitated product surface, a damping can be set. This time can
be between 0 and 999 seconds. Keep in mind that the reaction time of
the entire measurement will then be longer and the sensor will react
to measured value changes with a delay. In general, a period of a few
seconds is sufficient to smooth the measured value display.
Damping
0 s
Enter the requested parameters via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
A linearisation is necessary for all vessels in which the vessel volume
does not increase linearly with the level - e.g. in a horizontal cylindri-
cal or spherical tank - and the indication or output of the volume is
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".
Linearization curve
Linear
Enter the requested parameters via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
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.
Vessel form
Damping
Linearization curve
False signal suppression