1. Operation Phase

4. Operation and Maintenance Planning

8. SFF = 93%

9. Sensor testing options

10. Safely test the SIF using actual process variables Sensor testing options

11. Test sensors in-situ by other means Safely test the SIF using actual process variables Sensor testing options

12. Remove sensor and test on bench Test sensors in-situ by other means Safely test the SIF using actual process variables Sensor testing options

13. Perform wiring continuity test Remove sensor and test on bench Test sensors in-situ by other means Safely test the SIF using actual process variables Sensor testing options

14. Perform wiring continuity test Use smart features to test electronics and wiring continuity Remove sensor and test on bench Test sensors in-situ by other means Safely test the SIF using actual process variables Sensor testing options

15. Example – Rosemount 3051S Proof Test

16. Example – Rosemount 3051S Proof Test Proof Test 1: Analog output Loop Test Satisfies proof test requirement Coverage > 50% of DU failures

17. Example – Rosemount 3051S Proof Test Proof Test 1: Analog output Loop Test Satisfies proof test requirement Coverage > 50% of DU failures Proof Test 2: 2 point sensor calibration check Coverage > 95% of DU failures

18. Example – Rosemount 3051S Proof Test Proof Test 1: Analog output Loop Test Satisfies proof test requirement Coverage > 50% of DU failures Proof Test 2: 2 point sensor calibration check Coverage > 95% of DU failures Note – user to determine impulse piping proof test

19. Valve Testing Options

21. SIL 2 PFD Proof Test Interval (years)

22. Source: Instrument Engineers’ Handbook, Table 6.10e – Dangerous Failures, Failure Modes, and Test Strategy

23. Modification

25. ?