- by Loren Stewart, CFSE
- Thursday, March 21, 2019
- Functional Safety
Back to Basics 01 - Functional Safety
In the following series of blogs, we'll go back to basics and run down everything you need to know to get started in functional safety. We'll start with some more general terms and descriptions and make our way to more advanced material.
1. Functional Safety
Functional safety means the…
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- by Loren Stewart, CFSE
- Thursday, March 28, 2019
- Functional Safety
Back to Basics 02 - Safety Integrity Level (SIL)
In the following series of blogs, we'll go back to basics and run down everything you need to know to get started in functional safety. We'll start with some more general terms and descriptions and make our way to more advanced material.
2. Safety Integrity Level (SIL)
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- by Loren Stewart, CFSE
- Wednesday, April 10, 2019
- Functional Safety
Back to Basics 03 - Safety Instrumented Function (SIF)
In the following series of blogs, we'll go back to basics and run down everything you need to know to get started in functional safety. We'll start with some more general terms and descriptions and make our way to more advanced material.
3. SIF
SIF – Safety Instrumented Function…
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- by Loren Stewart, CFSE
- Sunday, April 21, 2019
- Functional Safety
Back to Basics 04 - Safety Instrumented System (SIS)
In the following series of blogs, we'll go back to basics and run down everything you need to know to get started in functional safety. We'll start with some more general terms and descriptions and make our way to more advanced material.
4. SIS
A SIS – Safety Instrumented…
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- by Loren Stewart, CFSE
- Tuesday, May 07, 2019
- Functional Safety
Back to Basics 06 – IEC 61508
In the following series of blogs, we'll go back to basics and run down everything you need to know to get started in functional safety. We'll start with some more general terms and descriptions and make our way to more advanced material.
IEC 61508: 2010 International Performance-Based Standard
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- by Loren Stewart, CFSE
- Tuesday, May 14, 2019
- Functional Safety
Back to Basics 07– Safety Lifecycle – IEC 61508
The IEC 61508 standard recommends the use of a functional safety lifecycle. Any safety lifecycle can be used, but the standard does lay out a nominal 16-step process which can be divided into three main classifications as an example.
The Analysis phase of the lifecycle deals with gathering background…
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- by Loren Stewart, CFSE
- Tuesday, May 21, 2019
- Functional Safety
Back to Basics 08 – IEC 61511
IEC 61511: 2016 Process Industry Sector
IEC 61511 is a technical standard that sets out practices in the engineering of systems that ensure the safety of an industrial process through the use of instrumentation. It entails requirements for users of process control and instrumentation for component / element or sub-system safety.…
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- by Loren Stewart, CFSE
- Thursday, May 30, 2019
- Functional Safety
Back to Basics 09 – Safety Lifecycle – IEC 61511
The IEC 61511 standard recommends the use of a functional safety lifecycle. Any safety lifecycle can be used, but the standard lays out a process which can be divided into three main classifications as an example.
The lifecycle is set up like this:
- Analyze the situation and document…
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- by Loren Stewart, CFSE
- Tuesday, June 11, 2019
- Functional Safety
Back to Basics 10 – How Does a Product Get a SIL?
IEC 61508 functional safety standard indicates Safety Integrity Levels (SIL) needs to be evaluated by three design barriers:
- The Systematic Capability Rating
- The Architectural Constraints for the Element
- The Probability of Failure for the Product
Systematic Capability is achieved when the equipment…
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- by Loren Stewart, CFSE
- Wednesday, June 26, 2019
- Functional Safety
Back to Basics 11 – How is SIL Used by an End User?
IEC 61508 and IEC 61511 functional safety standards allow Safety Integrity Levels (SIL) to be used four ways by end users:
- To establish risk reduction requirements - How much risk needs/can be removed from the process to achieve a tolerable risk level? (For more…
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