VEGA VEGADIF 65 4 … 20 mA_HART - Manual (Page 66)

66
8 Setup
VEGADIF 65 • 4 … 20 mA/HART
36128-EN-130417
+
A
B
6 7
3
2 4
1 5
+ –
II
I
III III
Fig. 55: Preferred measurement setup for closed vessels
I VEGADIF 65
II 3-fold valve block
III Separator
1, 5 Drain valves
2, 4 Inlet valves
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
Close valve 3: Separate plus and minus side
Open valve A and B: Open block valves
3. Vent plus side (probably empty minus side)
Open valve 2 and 4: Discharge medium on the plus side
Briefly open valve 6 and 7, then close again: Fill the plus side
completely with the medium and remove air.
4. Set measurement loop to operation
Now:
Valve 3, 6 and 7 are closed
Valves 2, 4, A and B are open
Then carry out adjustment, see below.
Measurement setup for
closed vessels
Prepare the adjustment