VEGA VEGADIF 55 4 … 20 mA_HART User Manual
Page 67
VEGADIF
55
is used in all versions for level measurement in closed
vessels.
Note:
VEGADIF
55
in cell isolating diaphragm version is immediately ready
for operation.
VEGADIF
55
in flange version: After opening a probably existing block
valve, the instrument is ready for operation.
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.
+
A
B
6
7
3
2
4
1
5
+
–
II
I
III
III
Fig. 67: Closed vessel with steam layer
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
P
roceed as follows to prepare the actual adjustment:
1
F
ill the vessel to just above the lower tap
2
F
ill measuring system with medium
O
pen valve A and B: Open block valves
Vessel with steam layer-
ing
VEGADIF
55 • 4 … 20
mA/HART
67
7 S
et up
31731
-EN
-081119