IEC 61508 in the Safety Automation Equipment List
IEC 61508 in the Safety Automation Equipment List
IEC 61508 in the Safety Automation Equipment List
The Greek symbol λDD is the detectable dangerous failure rate in functional safety expressed in the unit of measurement of FITs which can be determined through FMEDAs . ( FITs (λ) are failures per billion hours, expressed by 10 -9 hours). λDD is the number of dangerous detected failures per…
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 and what that means to the end user.
What you will learn?
Who should attend?
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When it comes to IEC61511 and the selection of equipment for use within Safety Instrumented Systems (SIS) and Safety Instrumented Functions (SIF), there are only two methods that can be used to justify selection: I EC61508 Certified devices for the required SIL or Prior Use Justification. Just because the user…
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Safety planning is a specific requirement of IEC 61511 yet many organizations lack specific documentation on how functional safety is managed. This course reviews the requirements of the IEC 61511 Lifecycle and offers guidance for development of a written Functional Safety Management (FSM) Plan. It provides insights on how to…
Final elements play a key role in achieving a safe design, initial capital investment, and total operation cost. Understanding how final elements are designed and how they can fail enables users to make informed tradeoffs between upfront cost and lifetime costs. This webinar will review key information that should be collected and reviewed whether you are working with a new SIF design or managing installed equipment.
Attendees of the webinar will:
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The Greek symbol λDU is the undetectable dangerous failure rate in functional safety expressed in the unit of measurement of FITs which can be determined through FMEDAs . ( FITs (λ) are failures per billion hours, expressed by 10-9 hours). λDU is the number of dangerous undetected failures per unit…
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