VEGA VEGADIF 55 4 … 20 mA_HART User Manual
Page 65
Fig. 65: Open vessel
I
VEGADIF 55
II
Precipitator
1
Drain valve
6
.7 Vent valves on VEGADIF 55
A
Block valve
Proceed as follows to prepare for the actual adjustment:
1
F
ill the vessel to just over the lower tap.
2
F
ill measuring system with medium.
O
pen valve A: Medium flows in.
3
V
ent instrument
B
riefly open valve 6, then close it: Fill the measuring instrument
completely with the medium and remove air.
4
S
et measurement loop to operation
N
ow:
V
alve B and 6 are closed
V
alve A open
5
C
arry out adjustment, see end of chapter "Level measurement"
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.
Closed vessel
VEGADIF
55 • 4 … 20
mA/HART
65
7 S
et up
31731
-EN
-081119