VEGA VEGADIF 65 4 … 20 mA - Manual (Page 61)

61
7 Setup
VEGADIF 65 • 4 … 20 mA
36236-EN-130417
A B
+
1 5
6 7
+ –
2 4
3
II
I
III III
Fig. 50: Preferred measurement setup for liquids
I VEGADIF 65
II 3-fold valve block
III Separator
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. Close valve 3
2. Fill measuring system with medium.
Open valves A, B, 2, 4: Medium flows in.
If necessary, clean the differential pressure lines: - with gases by
blowing out with compressed air - with liquids by rinsing. 3)
Close valve 2 and 4, block the instrument
Open valve 1 and 5
Close valve 1 and 5
3. Remove air from instrument:
Open valves 2 and 4: Medium flows in
Close valve 4: Minus side is closed
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:
Valves 1, 3, 5, 6 and 7 are closed
4)
Measurement setup for
liquids
Prepare the adjustment
3) Arrangement with 5 valves.
4) Valves 1, 3, 5: Configuration with 5 valves.