Archive - November 2016

Proof Testing of Safety Instrumented Functions: A Beginners Guide (Part 2)

A key part of any IEC 61511 or IEC 61508 Safety Integrity Level (SIL) Assessment is the Random Hardware Failures verification; does the Safety Instrument Function (SIF) meet its Probability of Failure on Demand (PFD). Achieving this is heavily dependent on the frequency at which a SIF (and its constituent elements) is PROOF TESTED. Clearly a good understanding of t… More

Proof Testing of Safety Instrumented Functions: A Beginners Guide (Part 1)

A key part of any IEC 61511 or IEC 61508 Safety Integrity Level (SIL) Assessment is the Random Hardware Failures verification; does the Safety Instrument Function (SIF) meet its Probability of Failure on Demand (PFD). Achieving this is heavily dependent on the frequency at which a SIF (and its constituent elements) is PROOF TESTED. Clearly a good understanding of t… More