VEGA VEGADIF 55 4 … 20 mA_HART User Manual
Page 75
A
B
+
1
5
6
7
+
–
2
4
3
II
I
III
III
Fig. 70: Preferred installation for liquids
I
VEGADIF 55
II
Three-fold valve block
III
Precipitator
1
.5 Drain valves
2
.4 Inlet valves
3
Breather valve
6
, 7 Vent valves on VEGADIF 55
A, B Block valves
Proceed as follows to prepare for the actual adjustment:
1
C
lose valve 3
2
F
ill measuring system with medium.
O
pen valves A, B, 2, 4: Medium flows in.
Note:
I
f necessary, clean the differential pressure lines: - with gases by
blowing out with compressed air - with liquids by rinsing.
6)
l
C
lose valve 2 and 4, block the instrument
l
O
pen valve 1 and 5
7)
l
C
lose valve 1 and 5
8)
3
V
ent instrument
O
pen valves 2 and 4: Medium flows in
C
lose valve 4: Minus side will be closed
O
pen valve 3: Equalisation plus and minus side
B
riefly open valve 6 and 7, then close again: Fill the measuring
instrument completely with the medium and remove air
6)
A
rrangement with 5 valves.
7)
A
rrangement with 5 valves.
8)
A
rrangement with 5 valves.
VEGADIF
55 • 4 … 20
mA/HART
75
7 S
et up
31731
-EN
-081119