VEGA VEGAMET 391 4 … 20 mA_HART - Manual (Page 24)

24
6 Setup with the integrated display and adjustment unit
VEGAMET 391 • 4 … 20 mA/HART
36032-EN-130701
→
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].
Under "Outputs", you'll find the relay/current outputs. With the relay
output, the requested mode ("Overfill protection/Dry run protection" or
"Pump control") must first be selected.
•
Overfill protection: Relay is switched off when the max. level is
exceeded (safe currentless condition), relay is switched on again
when the level falls below the min. level (switch-on point < switch-
off point)
•
Dry run protection: Relay is switched off when the level falls
below the min. level (safe currentless condition), relay is switched
on again when the max. level is exceeded (switch-on point >
switch-off point)
•
Pump control: With several pumps having the same function, the
pumps will be alternately switch on and off according to the adjust-
able criteria
Additional modes such as "Switching window", "Flow" and "Tenden-
cy" can be only adjusted via PACTware and DTM.
Relay 6 can be also configured as fail safe relay. The following exam-
ple shows the adjustment of an overfill protection. Further information
to pump control, tendency recognition or flow measurement are avail-
able in chapter "Application examples".
Meas. loop - Scaling
Meas. loop - Meas. loop
TAG
Meas. loop - Outputs -
Relays outputs