SITRANS P, DS III series (7MF4.33.. 7MF4.34.. 7MF4.35..)
30
A5E03434631-02, 12/2012
5.4.4
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 5-2
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
.
3.
Wait until the steam in the differential pressure lines
⑤
and in the equalizing vessels
⑧
has condensed.
4.
Open the differential pressure valve
③
and the vent valve on the positive side of the transmitter
①
slightly, until
condensate escapes without bubbles.
5.
Close the vent valve.
6.
Open the vent valve on the negative side of the transmitter
①
slightly, until condensate escapes without bubbles.
7.
Close the differential pressure valve
③
.
8.
Open the differential pressure valve
④
slightly, until condensate escapes without bubbles, then close it.
Summary of Contents for SITRANS DS III series
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