Ever wondered how to proof test a safety instrumented system? Proof test is a term that was first coined in the original IEC 61511 standard (functional safety – safety instrumented systems for the process industry sector). Unlike regular testing to see if a system performs as required by a specification, a SIF proof test should be

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If you own or operate any electrical / electronic or programmable system that has safety functions with a SIL (safety integrity level) rating, then you need to conduct periodic functional safety audit or FSA 4.I hear you say, “functional safety audits and functional safety assessments are not a requirement, our installation pre-dates these new-fangled standards!”. Read

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Read on to see the software buyer’s guide table…a comparison of 4 cloud-based software solutions for functional safety. This blog will will look at the main reasons why using such software is better than many traditional approaches, which companies are working in the domain, and the questions you should ask before you choose a solution.The

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For the third blog of this series, the focus is on proof testing. This article will look at what proof testing is, why it’s needed, and give some outline examples of proof test procedure requirements.What is “proof testing” and why is it needed?The term “proof testing” was first introduced in the  IEC 61511 [1] standard when

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Operation and maintenance procedures for Safety Instrumented Systems (SIS) will vary from company to company. However, there are some specific requirements that need to be covered for safe continued operation. The first blog on this topic discussed general operation and maintenance (O&M) requirements for sustaining the integrity of a SIS. This second article discusses the requirements

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How do you ensure a Safety Instrumented System in operation will maintain its original design integrity for a lifetime of 15+ years? The IEC 61511 (2016) safety life-cycle provides some brief guidance for operation and maintenance of a safety instrumented system (SIS) in clause 16. The stated objectives are to ensure that the validated system’s safety

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