Siemens SITRANS P Instruções de Operação Página 159

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9.4.4 Commissioning with vapor


Pressure transmitter Drain valves
Stabilizing valve Condensate pots
,
Differential pressure valves Differential pressure transducer/Orifice plate
Differential pressure lines Insulation
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 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 and the differential pressure
valves are open at the same time and the stabilizing valve is opened, there is a
possibility of the transmitter being damaged due to the streaming vapor.
To commission the transmitter for vapor, proceed as follows:
1.
Open both the shut-off valves at the pressure tapping point.
2. Open the stabilizing valve .
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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