Vega VEGASCAN 693 Operating Instructions Manual page 21

Meas. loop - Damping
Meas. loop - Linearization
curve
VEGASCAN 693 - 15-channel HART signal conditioning instrument
Setup with the integrated indicating and adjustment unit
à
With [OK] you prepare the percentage value for editing,
with [->] you set the cursor to the requested position. Set
the requested percentage value with [+] and save with
[OK]. The cursor jumps now to the distance value.
à
Enter now the appropriate distance value in m [m(d)]
(corresponding to the percentage value) for the empty
vessel (e.g. distance from the sensor to the vessel bottom).
à
Save the settings with [OK] and move to "Max. adjustment"
with [->].
Max. adjustment 1
100.00 %
≙
0.000 m(d)
0.489 m(d)
à
As previously described, enter now the percentage value
for the max. adjustment and confirm with [OK].
à
Enter now the appropriate distance value in m [m(d)]
(corresponding to the percentage value) for the full vessel.
Keep in mind that the max. level must be below the radar
antenna.
à
Finally save your settings with [OK], the adjustment is
finished.
To suppress fluctuation in the measured value display, e.g.
caused by a turbulent product surface, an integration time can
be set. This time can be between 0 and 999 seconds. Please
note that the reaction time of the measurement will be longer
and the sensor will react to quick changes of the measured
value with a corresponding delay. In general, a time of a few
seconds is sufficient to smooth the measured value display.
Damping 1
1 s
à
Enter the requested parameter via the appropriate keys
and save your settings with [OK].
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. Corresponding linearization
curves are preprogrammed for these vessels. They represent
the correlation between the level percentage and vessel
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