Category : Safety Instrumented System (SIS)

A Safety Instrumented System (SIS) is engineered to perform “specific control functions” to failsafe or maintain safe operation of a process when unacceptable or dangerous conditions occur.

Safety Instrumented System Probability

S Bharadwaj Reddy
While the term “probability” may evoke images of imprecision, probability is in fact an exact mathematical concept: the ratio a specific outcome to total possible outcomes where 1 (100%) represents...

Functional Safety Questions & Answers

S Bharadwaj Reddy
Functional Safety Questions & Answers : SIS as an “instrumented system used to implement one or more safety instrumented functions. Functional Safety Questions & Answers What is PHA ? Process...

S84 / IEC 61511 Standard for Safety Instrumented Systems

S Bharadwaj Reddy
IEC 61511 is a technical standard which sets out practices in the engineering of systems that ensure the safety of an industrial process through the use of instrumentation. Such systems...

Difference between Availability, Reliability & SIL

S Bharadwaj Reddy
We often come across the above terms, and others, when we are talking about equipment and systems. All of them relate in some way to how well something will perform...

Safety Instrumented System Module Failure

S Bharadwaj Reddy
The international standard IEC/EN 61508 has been widely accepted as the basis for the specification, design and operation of safety instrumented systems (SIS). As the basic standard, IEC/EN 61508 uses...

Safety Instrumented System Interview Questions and Answers

S Bharadwaj Reddy
Read the following Safety Instrumented System Interview Questions and Answers useful for interview preparation. Safety Instrumented Systems must be independent from all other control systems that control the same equipment in...

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