5. Open the shut-off valve ⑥ at the pressure tapping point.
6. Open the shut-off valve for the process ③.
5.5 Differential pressure and flow rate
WARNING
Incorrect or improper operation
If the lock screws are missing or are not sufficiently tight, and/or if the valves are operated
incorrectly or improperly, it could lead to serious physical injuries or considerable damage to
property.
Measure
● Make sure that the lock screws and/or the vent valve are screwed in and fully tightened.
● Operate the valves properly.
5.5.1 Commissioning in gaseous environments
Requirement
All shut-off valves are closed.
Commissioning
5.5 Differential pressure and flow rate
SITRANS P320/P420 (mA/HART)
42 Compact Operating Instructions, 06/2018, A5E38874562-AA
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