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Posts Tagged ‘proof test’

Reducing Level Detector Proof Testing Complexity

Posted in Level, Safety on Tuesday, July 16th, 2019. No comments yet
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Each safety instrumented function (SIF) including its sensor, logic solver and final control element must be periodically tested to make sure it will perform as designed in the event of a safety demand. These “proof tests” help to uncover and failure conditions which may have developed since the last proof test or safety demand. A […]

Optimizing Safety Instrumented System Proof Testing

Posted in Safety on Monday, May 8th, 2017. No comments yet
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If you are new to the world of process safety, you quickly learn that it has its own jargon with phrases such as safety instrumented functions, proof test intervals, PDFavg, etc. A Flow Control magazine article, Ensuring safety compliance with optimized proof testing, written by Emerson’s Afton Coleman, Erik Mathiason and Tonya Wyatt does a […]

Level Switch Diagnostics for Remote Proof Testing and Instrument Health

Posted in Level on Wednesday, March 22nd, 2017. One comment so far
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Many of the “things” in the Industrial Internet of Things are the sensors that measure not only operating, but also safety-, reliability- and efficiency-related parameters from a manufacturing and production facility. In a Process Industry Informer article, Enhanced Diagnostics Help To Ensure Reliable Level Monitoring, Emerson’s Marianne Williams shares how technology advancements in vibrating fork […]

Staying on Schedule through Diagnostic Detection

Posted in Refining, Safety on Friday, December 10th, 2010. No comments yet
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Emerson’s David Sheppard, a certified functional safety expert, passed along a great story of a recent refinery incinerator startup. Over the course of a week, the incinerator was taken down so that the emergency shutdown system (ESD) and process control-related instruments could be cut over. By the end of the week, the loop tests were […]

Partial-Stroke Tests, Proof Tests, and Smart Positioners in Safety Applications

Posted in Abnormal Situation Prevention, Safety on Tuesday, January 2nd, 2007. 5 comments so far
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Before the holidays, Dave Harrold wrote a post, A Wee Bit More About Safety Instrumented Systems, in his Dave @ AFAB Group blog. He describes his work with Dr. Angela Summers, founder/president of SIS-Tech Solutions on a guidelines book for the global IEC 61511 safety standards. Dave also referenced an SIS-related Q&A article Angela wrote […]