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1. Open the shut-off valve for the test connection
④
.
2. Via the test connection of the shutoff valve
②
, apply the pressure corresponding to the
lower range value to the pressure transmitter.
3. Ensure that the lower range value corresponds to the desired value. Otherwise, correct the
value.
4. Close the shut-off valve for the test connection
④
.
5. Open the shut-off valve
⑥
at the pressure tapping point.
6. Open the shut-off valve for the process
③
.
8.5.1.2
Commissioning with steam or liquid
Requirement
All valves are closed.
Procedure
①
Pressure transmitter
②
Shut-off valve
③
Shut-off valve to process
④
Shut-off valve for test connection or for bleed screw
⑤
Pressure line
⑥
Shut-off valve
⑦
Drain valve
⑧
Compensation vessel (steam only)
Commissioning
8.5 Application examples
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
93