Endress+Hauser 9P5B, Functional Safety Manual

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Use in protective systems Proline Prosonic Flow P 500 HART
28 Hauser
5.3.2 Proof testing the sensor subsystem
If there are no operator-specific requirements for the proof test, the following alternative is
available for testing the sensor subsystem
2)
depending on the "volume flow" measured
variable used for the safety function.
PTC
1)
Proof testing
48 % Device restart and testing of current output 1 1 →  29
98 % Testing with a secondary standard 3 →  33
99 % Testing with a secondary standard and testing of current output 1 4 →  34
1) Proof Test Coverage
Other recommendations
It is advisable to perform a visual inspection on site.
‣
As part of the visual inspection of the transmitter, ensure that all of the electronics
compartment cover seals and cable entries are providing adequate sealing.
2) Under IEC 61508, the sensor is synonymous with the entire flowmeter.