Siemens SITRANS P DS III - Page 25

SITRANS P DS III (7MF4.33.. 7MF4.34.. 7MF4.35..)
A5E03434626-03, 06/2013
25
5.3
gauge pressure, absolute pressure from the differential pressure
series and absolute pressure from the gauge pressure series
5.3.1
Commissioning for gases
Usual arrangement
Special arrangement
Measuring gases above the pressure tapping point
Measuring gases below the pressure tapping point
①
Pressure transmitter
⑤
Pressure line
②
Shut
-off module
⑥
Shut
-off valve
③
Shut
-off valve to process
⑦
Shut
-off valve (optional)
④
Shut
-off valve for test connection or for bleed screw
⑧
Condensate vessel (optional)
⑨
Drain valve
Condition
All valves are closed.
Procedure
To commission the transmitter for gases, proceed as follows:
1. Open the shut-off valve for the test connection
④.
2. Via the test connection of the shut-off fitting ②, apply the pressure corresponding to the start of scale value to the
pressure transmitter
①.
3. Check the start of scale value.