Siemens SITRANS P series - Maintenance Procedures and Warnings; Post-Maintenance and Hazardous Area Safety; Maintenance Interval and Key Lock

SITRANS P, DS III series (7MF4.33.. 7MF4.34.. 7MF4.35..)
A5E03434631-02, 12/2012
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9. Close the vent valve on the negative side ①.
10. Open the differential pressure valve
③ by rotating it in half a turn.
11. Check and if required correct the zero point in case of start of scale value 0 bar (4 mA).
12. Close the stabilizing valve
②.
13. Fully open the differential pressure valves
③ and ④.
14. You can briefly open the drain valves
⑦ to clean the line. Close before steam starts to leak.