
9.4.4 Commissioning with vapor
① Pressure transmitter ⑦ Drain valves
② Stabilizing valve ⑧ Condensate pots
③,
④
Differential pressure valves ⑨ Differential pressure transducer/Orifice plate
⑤ Differential pressure lines ⑩ Insulation
⑥ Shut-off valves
Figure 9-2 Measuring steam
Condition
All valves are closed.
Procedure
NOTICE
The measuring result is error-free only if the differential pressure lines ⑤ have equally high
condensate columns with the same temperature. The zero calibration must be repeated if
required
if these conditions are fulfilled. If the shut-off valves ⑥ and the differential pressure
valves ③ are open at the same time and the stabilizing valve ② is opened, there is a
possibility of the transmitter ① being damaged due to the streaming vapor.
To commission the transmitter for vapor, proceed as follows:
1.
Open both the shut-off valves ⑥ at the pressure tapping point.
2. Open the stabilizing valve ②.
Commissioning
9.4 Differential pressure and flow rate
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 157
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