WIKA DPT-20, Руководство по эксплуатации

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7 Set up measuring system
WIKA Operating Instructions - Differential pressure transmitter DPT-20
7 Set up measuring system
7.1 Level measurement
+
A
B
1 5
II
I
6 7
3
2
4
+ –
III III
Fig. 40: Preferred measurement setup for closed vessels
I DPT-20
II 3-fold valve block
III Precipitator
1, 5 Drain valves
2, 4 Inlet valves
3 Breather valve
6, 7 Vent valves on DPT-20
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 high/low pressure side
Open valve A and B: Open block valves
3. Vent high pressure side (probably empty low pressure side)
Open valve 2 and 4: Discharge medium on the high pressure side
Briefly open valve 6 and 7, then close again: Fill the high pressure
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
Closed vessel