Vega VEGASCAN 693 Operating Instructions Manual page 22

6 Setup with the integrated display and adjustment unit
Meas. loop - Damping
Meas. loop - Linearization
curve
Meas. loop - Scaling
Meas. loop - Meas. loop
TAG
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loop selected by you initially. All other measurement loops must
be adjusted separately, if necessary.
To suppress fluctuations in the measured value display, e.g. caused
by an agitated product surface, an integration time can be set. This
time can be between 0 and 999 seconds. Remember 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.
→
Enter the requested parameters 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, for example, with a cylindrical
or spherical tank. Corresponding linearization curves are prepro-
grammed 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.
→
Enter the requested parameters via the appropriate keys and
save your settings with [OK].
Scaling means converting the measured value into a certain param-
eter and unit. The linearized percentage value is the source signal
which is used as basis for the scaling. The indication can then show
the volume in litres e.g., instead of the percentage value. Indication
values from max. -99999 to +99999 are possible.
→
Enter the requested parameters via the appropriate keys and
save your settings with [OK].
In this menu item you can enter an unambiguous designation for each
measurement loop, e.g. the measurement loop name or the tank or
product designation. In digital systems and in the documentation
of larger plants, a singular designation should be entered for exact
identification of individual measuring points.
VEGASCAN 693 • 15-channel HART signal conditioning instrument