VEGA VEGADIF 55 4 … 20 mA_HART - Manual (Page 8)

l T echnical data
l A rticle numbers documentation
W ith the serial number, you can access the delivery data of the
instrument via "www.vega.com", "VEGA Tools" and "serial number
search". I
n addition to the type label outside, you can also find the
serial number on the inside of the instrument.
3 .2 Principle of operation
VEGADIF 55 is a differential pressure transmitter for measurement of
flow, level or differential pressure. Measured products are gases,
vapours and liquids.
T he sensor element is a metallic measuring cell. The process pressure
is transmitted via the separating diaphragm and filling oil to the
resistance measuring bridge (semi-conductor technology). The differ-
ential-pressure dependent change of the bridge voltage is measured,
further processed and converted into a corresponding output signal.
T he configuration of the measuring cell differs depending on the
measuring range:
1
2
3
4
5
1
p
2
p
Fig. 2: Metal measuring cell 10 mbar and 30 mbar
1
Measuring element
2 Silicone diaphragm
3 Separating diaphragm
4 Filling oil
5 Integrated overvoltage arrester
Area of application
Functional principle
8 VEGADIF 55 • 4 … 20 mA/HART
3 P roduct description
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-EN
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