VEGA VEGADIF 65 Foundation Fieldbus User Manual
Page 9
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9
3 Product description
VEGADIF 65 • Foundation Fieldbus
36130-EN-130417
Flow measurement
Q
Q
p
1
p
1
p
2
p
2
Q ~ ∆p
Q ~ ∆p
+
+
–
–
1
2
Fig. 3: Flow measurement with VEGADIF 65 and DP flow element, Q = flow, Δp
= differential pressure, Δp = p
1
- p
2
1 Orifice
2 Pitot tube
Level measurement
1
2
3
h = ∆p
ρ g
+
+
–
–
h
+
–
Fig. 4: Level measurement with VEGADIF 65. Δp = differential pressure, ρ =
density of the medium, g = acceleration of gravity
1 Basic version with effective pressure lines
2 Version with flange chemical seal
3 Version with capillaries and cell chemical seals
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