VEGA VEGADIF 55 4 … 20 mA_HART - Manual (Page 74)

7 .7 Differential pressure measurement
VEGADIF 55 is used in all versions for differential pressure
measurements.
Note:
T
he VEGADIF 55 with cell isolating diaphragms and capillary lines is
immediately ready for adjustment.
B efore you adjust VEGADIF 55 in basic version, you have to clean the
effective pressure lines and the instrument must be filled with the
medium.
+ –
I
II
+
6 7
3
2 4
A B
Fig. 69: Preferred installation for gases
I
VEGADIF 55
II Three-fold valve block
2 , 4 Inlet valves
3 Breather valve
6 , 7 Vent valves on VEGADIF 55
A, B Block valves
Preparations
74 VEGADIF 55 • 4 … 20 mA/HART
7 S et up
31731
-EN
-081119