What is Prior Use Justification & How To Achieve it?

Описание: The IEC61511 standard requires that designers of Safety Instrumented Systems (SIS) need to justify the selection of equipment to be used in Safety Instrumented Functions (SIFs).  As such, the standard defines only two methods that are acceptable: IEC61508 certified devices or Prior Use Justification.  Devices that are not certified to IEC61508 will require suitable justification for use in SIFs.  The objective of Prior Use Justification is to gather evidence that the dangerous systematic faults have been reduced to a sufficiently low level, compared to the required safety integrity.  This is in addition to the separate requirement to satisfy the random failure rate/probability criteria (i.e. PFDavg/PFH).

The purpose of this webinar is to shed some further light into the Prior Use Justification requirement for SIF equipment, how to achieve it and what that means to the end user.

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