VEGA VEGADIF 65 Foundation Fieldbus - Manual (Page 62)

62
8 Setup
VEGADIF 65 • Foundation Fieldbus
36130-EN-130417
+
A
B
6 7
3
2 4
1 5
+ –
II
I
III III
IV
Fig. 55: Preferred measurement setup for closed vessels with steam overlay
I VEGADIF 65
II 3-fold valve block
III Separator
IV Condensate vessel
1, 5 Drain valves
2, 4 Inlet valves
3 Breather valve
6, 7 Vent valves on VEGADIF 65
A, B Blocking valves
Proceed as follows:
1. Fill the vessel to just above the lower tap
2. Fill measuring system with medium
Open valve A and B: Open block valves
Fill the minus effective pressure line on the height of the conden-
sation pot
3. Remove air from instrument:
Open valve 2 and 4: Discharge medium
Open valve 3: Equalisation plus and minus side
Briefly open valve 6 and 7, then close again: Fill the measuring
instrument completely with the medium and remove air
4. Put measurement loop into operation:
Close valve 3: Separate plus and minus side
Open valve 4: Connect minus side
Now:
Valve 3, 6 and 7 are closed
Valves 2, 4, A and B are open.
Measurement setup
for closed vessels with
steam overlay
Prepare the adjustment