Vega VEGADIF 85 - Principle of Operation

8
3 Product description
VEGADIF 85 • Modbus and Levelmaster protocol
53571-EN-230814
3.2 Principle of operation
VEGADIF 85 is suitable universally for applications in virtually all
industries. It is used for the measurement of the following pressure
types:
•
Dierentialpressure
•
Static pressure
Measured products are gases, vapours and liquids.
Thedierentialpressuremeasurementenablesthemeasurementof:
•
Level
•
Flow
•
Dierentialpressure
•
Density
•
Interface
The instrument is suitable for level measurement in closed, superim-
posedpressurevessels.Thestaticpressureiscompensatedbydier-
ential pressure measurement. It is available as a separate measured
value for digital signal outputs.
Fig. 1: Level measurement with VEGADIF 85 in a pressurized vessel
Theowmeasurementiscarriedoutviaaneectivepressuretrans-
mitter,suchasanoriceplateorpitottube.Thedevicerecordsthe
resultingpressuredierenceandconvertsthemeasuredvalueinto
theow.Withdigitalsignaloutputs,thestaticpressureisavailableas
a separate measured value.
Q
p
1
p
2
+
–
Fig. 2: Flow measurement with VEGADIF 85 and orice, Q = ow, dierential
pressure Δp = p
1
- p
2
Application area
Measured products
Measured variables
Level measurement
Flow measurement