Siemens SITRANS P - Commissioning with Vapor

9. Partially open the di󹪜erential pressure valve ④ until liquid escapes without bubbles.
10.Close the di󹪜erential pressure valve.
11.Close the vent valve (sealing plug with vent valve) on the negative side of the pressure
transmitter.
12.Open the di󹪜erential pressure valve ③ with half a revolution.
13.For a lower range value of 0 bar, check the zero point (4 mA) and correct the lower range
value if it is di󹪜erent.
14.Close the stabilizing valve ②.
15.Open the di󹪜erential pressure valves (③ and ④) completely.
6.3.2.3 Commissioning with vapor
Requirement
All valves are closed.
WARNING
Hot vapor
Danger of injury or damage to device.
If the shut-o󹪜 valves ⑥ and the di󹪜erential pressure valve ③ are both open and the stabilizing
valve ② is then opened, the pressure transmitter ① can be damaged by the 󹪞ow of vapor.
• Follow the speci󹪝ed procedure for commissioning.
WARNING
Hot vapor
Danger of injury.
You can brie󹪞y open the drain valves ⑦ to clean the line. Hot vapor can escape in the process.
• Only open the drain valves ⑦ brie󹪞y, and close them again before vapor escapes.
Commissioning
6.3 Application examples
SITRANS P320/P420
52 Compact Operating Instructions, 01/2021, A5E38874562-AC