30
6 Set up with the display and adjustment module PLICSCOM
VEGACAL 62 • Profibus PA
30025-EN-160331
3. Enter the current capacitance value in pF (displayed below) for
the full vessel corresponding to the percentage value.
4. Save the settings with
[OK]
.
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
".
Linearisation curve
Linear
Enter the requested parameters via the appropriate keys, save your
settings and jump to the next menu item with the
[->]
key.
Caution:
Note the following if the VEGACAL 62 with corresponding approval is
used as part of an overfill protection system according to WHG (Water
Resources Act):
If a linearisation curve is selected, the measuring signal is no longer
necessarily linear to the filling height. This must be considered by the
user especially when adjusting the switching point on the limit signal
transmitter.
The channel is the input selector switch for function block (FB) of
the sensor. Within the function block, additional scalings (Out-Scale)
are carried out. In this menu item, the value fir the function block is
selected:
•
SV1 (Secondary Value 1):
– Percent with radar, guided microwave and ultrasonic sensors
– Pressure or height with pressure transmitters
•
SV2 (Secondary Value 2):
– Distance with radar, guided microwave and ultrasonic sensors
– Percent with pressure transmitters
•
PV (Primary Value):
– Linearised percentage value
Channel
PV lin. value
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
Basic adjustment - Lin-
earization curve
Basic adjustment - Chan-
nel
Basic adjustment - Damp-
ing
