VEGA VEGAPULS 62 (≥ 2.0.0 - ≤ 3.8) standpipe ver. Profibus PA - Manual (Page 30)

Enter the requested parameter via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
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 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 parameter via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
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
linear
Enter the requested parameter via the appropriate keys, save your
settings and jump to the next menu item with the [->] key.
Caution:
Note the following, if VEGAPULS 62 is used as part of an overfill
protection system according to WHG:
If a linearisation curve is selected, the measuring signal is no longer
compulsorily linear proportional to the level. This must be taken into
consideration by the user, particularly when adjusting the switching
point on the level switch.
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 reflections will
be detected.
Vessel form
Linearisation curve
Gating out of false sig-
nals
30 VEGAPULS 62 standpipe version • Profibus PA
6 Set up with the indicating and adjustment module PLICSCOM
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