Vega VEGACAL 69 Operating Instructions Manual page 26

6 Set up with the display and adjustment module PLICSCOM
Carry out max. adjust-
ment
Basic adjustment - Damp-
ing
Basic adjustment - Lin-
earization curve
26
Fill the vessel to the highest possible level.
Note:
For max. adjustment, the vessel should be as full as possible. This will
make the calibration more accurate.
Proceed as follows:
Max. adjustment
100.00 %
=
1000 pF
327.4 pF
1. Prepare the adjustment value for editing with [OK]. Move to the
selection window with [OK].
Min. adjustment
Accept current measured
value?
Accept?
Edit?
2. Accept the current measured value or move to the editing window
with "Edit". To edit, set the cursor to the requested position with
[->]. Set the requested % value with [+] and save with [OK]. The
cursor jumps to the capacitance value.
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].
To suppress fluctuations in the measured value display, e. g. caused
by an agitated medium 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 linearization is necessary for all vessels in which the vessel volume
does not increase linearly with the level - e.g. a horizontal cylindri-
cal 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.
The linearisation applies to the measured value indication and the
current output. By activating the appropriate curve, the volume per-
centage 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".
VEGACAL 69 • Two-wire 4 ... 20 mA/HART