All posts in " sis maintenance "

Process SIS Operations Blog #3

By Jon Keswick, CFSE / August 23, 2018

For the third blog of this series, the focus is on proof testing. This article will look at what proof testing is, why it’s needed, and give some outline examples of proof test procedure requirements. It will also introduce some issues I’ve personally experienced during audits and assessments of proof test procedures in the process industry […]


Key safety instrumented system operations advice

By Jon Keswick, CFSE / June 12, 2018

Operation and maintenance procedures for Safety Instrumented Systems (SIS) will vary from company to company. However, there are some specific requirements that need to be covered for safe continued operation. The first blog on this topic discussed general operation and maintenance (O&M) requirements for sustaining the integrity of a SIS. This second article discusses the requirements […]