Chris Mee Group Safety Statements

Process Engineering Safety Integrity (SIL) Instrumentation – Introduction

This Process Engineering Safety Integrity one-day program is designed to give participants an introduction to process functional safety (SIL) from an instrumentation functional perspective.

This course (first of a series of 3 courses – Level  1, 2 & 3) is designed to provide delegates with a working knowledge of the functional safety requirements of IEC 61508 and IEC 61511 standards.

This Process Engineering Safety Integrity course is aimed at any personnel with a responsibility or needs to develop competency in process safety control systems.



+353 1 517 5270


+353 818 315 415

Venue Date Price
Cork, Little Island TBC € 450 Securely Book Now Online
Dublin – Ballymount D24 TBC € 450 Securely Book Now Online


Duration: 1 Day
Participants: Up to 12 participants
Assessment: Practical Assignment to be completed (within 2 weeks) following the completion of this 1-day course.
Accreditation: On full completion of this course each participant will receive a Occupli Certificate

Course Contents

Introduction to Process Operation and Performance; Measurement, Automation, Control Systems, Human Interface and Networks, Process Safety Protection System, Equipment Under Control [EUC]. Sensors, Logic Solvers and Final Control Elements.

Hazards and Risks; Inherent Risk and Tolerable Risk; Typically, acceptable risk values. Standards, Rules and Regulations. The role of IEC 61508 and IEC 61511.

Risk Reduction Techniques; Independent Layers of Protection using alternative methods such as mechanical and electrical devices.

The Safety Life Cycle; The concept of Safety Management by implementation of a defined set of procedures. Analysis of the Safety Life Cycle’s individual steps in the flowchart.

Safety Instrumented Systems; The configuration of Electrical, Electronic and Programmable Electronic Systems to provide a defined level of protection. Low Demand, High Demand and Continuous Demand Mode. Safety Integrity Levels, Fail Safe and Reserve Energy, Safety Instrumented Function.
System Failures; Random Failures, Common Cause Failures, Systematic Failures.

Mathematical Constants for each SIL approved device; Reliability, Un-reliability, Failure Rates, Bath tub Curve, Exponential Relationship with Time, Availability, Safe Failure Fraction, % Safe, Risk Reduction Factor, Mean tine to Failure, Mean Repair Time, Mean Down Time, Probability of Failure on Demand, Probability of Failure per Hour,

Device Types and Configurations; Type A and Type B devices, Hardware Fault Tolerance, Typical Voting Configurations, Triple Modular Redundancy, Achieving SIL1, SIL2 and SIL3 levels of protection.

Low Demand Mode Calculations; Equations for calculating Probability of Failure on Demand, Equations for Spurious Trip Rates, Calculations with single input and single output circuits using typical industrial devices.

Who should attend this course?

Chemical & Process Engineers, Process Designers, Engineers (mechanical, electrical, instrumentation), Maintenance & Instrumentation Technicians, Senior Electricians, Production/Process Team Leads, HAZOP Chairs & Safety Engineers.

Course Objectives

On completion of this program participants will be able to;

  • describe and define automated process operation and performance under normal and abnormal condition where a level of risk may arise.
  • apply reliability theory to the solution of practical problems involving electrical, electronic and programmable electronic safety devices.
  • select appropriate electrical and electronic devices based on their characteristics and construct basic safety circuits utilising these components based on IEC 61508 and IEC 61511 standards in low demand mode.
  • specify and verify basic series safety circuits with single input and single output configuration and verify the SIL level provided in low demand mode using Route 1H.
  • source device data sheets, certificates of compliance and understand the schematic circuitry involved in constructing the safety loop.


Each course is subject to course booking conditions. Please contact our office for further details.

For more info visit the HSA website.

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