Safety Instrumented System - Foundation Training

An IChemE accredited online self-paced learning path about safety instrumented systems according to the IEC 61511 / ISA 61511 standard.

Course Details

Course Overview

A Safety Instrumented System (SIS) is one of the key independent layers for protecting processes in applications such as safe isolation of storage tanks, turbine overspeed protection and burner management; just to name a few.

The modern SIS is typically a system comprising multiple sensors, a logic solver and final elements which are relied upon to react to potentially hazardous events with minimal operator intervention. The goal is to design a system that can detect process excursions from the norm, and automatically react to prevent escalation into an incident.

Starting with hazard and risk first principles, this course explains how all elements of the SIS safety lifecycle are connected from early concept through design and development, system testing and subsequent operation of an SIS.

The course introduces how Safety Integrity Level (SIL) is determined for each function in the SIS, using both qualitative and semi-quantitative techniques. It explains how SIS designs are verified using probability of failure calculations, with linkage to operational proof testing.

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Note: payment will be requested if you wish to complete the course.

Course Author

Jon Keswick Certified Functional Safety Expert - CFSE
Jon Keswick is the founder of eFunctionalSafety. He has more than 30 years of professional experience in the field of automation systems. In recent years, Jon has worked on many projects as independent functional safety assessor. This experience has provided a deep insight into what can go wrong, and what could be done better to avoid costly re-work on safety system projects.

Jon Keswick
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