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2. Differences with IEC 61508
2.1 Types of downtime considered
Figure 7 compares the types of unavailability covered by IEC 61508 with those covered by the PDS method.
Unlike the PDS method, IEC 61508 does not quantify unavailability related to :
functional testing and preventive maintenance DTU T ;
causes of failure not detectable during P TIF functional testing.
The failure to include a term equivalent to P...
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Differences with IEC 61508
Bibliography
Websites
Instrumentation Society of America (ISA)
SINTEF
...Standards and norms
- Analysis techniques for dependability – Reliability block diagram and Boolean methods - IEC 61078 -
- Functional safety of safety-related electrical/electronic/programmable electronic systems – chapters 1 to 7 – 2010 - IEC 61508 -
- Functional safety of safety instrumented systems for the process industry sector – 2016 - IEC 61511 -
- Analysis techniques for dependability – Reliability block diagram...
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