Functional Safety 2016

CONCLUSION

• Integrity levels (PFD, HFT and SC), and SIFRT are

both critical

factors

• PST & SIFRT throughout lifecycle – set margin early

• The method of measurement & technology impact

device response time

• Supplier guarantee is a challenge

• Validate SIFRT at installation & at periodic testing

• Documentation is important.

Slide 24

Challenges in Achieving Safety Instrumented Function Response Time for a Fast-Acting Process• K. Rampaul, A., A.

Barnwell, S. Sookhoo