VEGA VEGAMET 391 With SIL qualification - Manual (Page 23)

23
7 Setup with the integrated display and adjustment unit
VEGAMET 391 • With SIL qualification
38704-EN-130228
→
Carry out your settings via the appropriate keys and save 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.
→
Carry out your settings via the appropriate keys and save 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.
→
Carry out your settings via the appropriate keys and save 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.
→
Carry out your settings via the appropriate keys and save with
[OK].
The relay/current outputs are arranged under "Outputs". Keep in mind
that relays 1/2 are not integrated in the SIL safety concept.
First of all, select the requested mode ("Overfill protection/Dry run
protection" or "Pump control").
Meas. loop - Linearization
curve
Meas. loop - Scaling
Meas. loop - Meas. loop
TAG
Meas. loop - Outputs -
Relay 1/2