How to effectively evaluate low-demand safety instrumented functions

Sept. 24, 2018
A clear understanding is essential for achieving the needed reliability

A safety instrumented system is a high-reliability system comprised of sensors, logic solver(s) and final elements. It includes a number of safety instrumented functions (SIFs), each designed to provide a specified risk reduction. The necessary risk reduction is assigned as a safety integrity level that establishes the reliability requirements for the SIF. 

A clear understanding of the failure rate, failure mode and failure effects for devices as well as implementation of a management program to effectively identify and correct failures on a routine basis are essential for achieving the needed reliability.

This article from our sister website Chemical Processing will review failure rate and failure mode basics, proof test frequency and effectiveness, the robustness of the maintenance program, information collected during a proof test, and tips for analyzing data to ensure continued reliability.

Read the article on

Sponsored Recommendations

Measurement instrumentation for improving hydrogen storage and transport

Hydrogen provides a decarbonization opportunity. Learn more about maximizing the potential of hydrogen.

Get Hands-On Training in Emerson's Interactive Plant Environment

Enhance the training experience and increase retention by training hands-on in Emerson's Interactive Plant Environment. Build skills here so you have them where and when it matters...

Learn About: Micro Motion™ 4700 Config I/O Coriolis Transmitter

An Advanced Transmitter that Expands Connectivity

Learn about: Micro Motion G-Series Coriolis Flow and Density Meters

The Micro Motion G-Series is designed to help you access the benefits of Coriolis technology even when available space is limited.