Level Measurement - Vega VEGABAR 83 Operating Instructions Manual

Output measured values
Measurement setup
VEGABAR 83 • Secondary Device for electronic differential pressure
Differential pressure on orifice: 50 mbar = 0.050 bar
Total pressure: 0.8 bar + 0.05 bar = 0.85 bar
Instrument selection
Nominal measuring range Primary: 1 bar
Nominal measuring range Secondary: 1 bar
Turn Down: 1 bar/0.050 bar = 20 : 1
The measuring result (level, pressure difference) as well as measured
value Secondary (static or superimposed pressure) are output by the
sensor. Depending on the instrument version, output as 4 ... 20 mA
signal or digitally via HART, Profibus PA or Foundation Fieldbus.
4.4

Level measurement

Keep the following in mind when setting up the measuring system:
•
Mount the Primary Device below the min. level
•
Mount primary device away from emptying
•
Mount the Primary Device so that it is protected against pressure
shocks from the stirrer
•
Mount the Secondary Device above the max. level
•
Mount secondary device away from filling stream
Fig. 8: Measurement setup, level measurement in pressurized vessel
1 VEGABAR 83, Primary Device
2 VEGABAR 83, Secondary Device
2
1
4 Mounting
17