Posts Tagged ‘safety instrumented system’

Proof Testing Level Measurement Devices

Posted in Level, Safety on Tuesday, August 8th, 2017. No comments yet
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Safety instrumented systems (SIS) include the sensor(s), final control element(s) and logic solver(s) for each of the safety instrumented functions (SIFs) in the SIS. To verify the SIFs are performing the amount of risk reduction intended for their application, they must be periodically proof tested. PCN Europe magazine interviewed Emerson’s Teddy Tzegazeab on how proof […]

Level Sensor Safety Proof Testing

Posted in Level, Safety on Thursday, July 13th, 2017. No comments yet
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Backing up your computer or server is a waste of time if restoring the backup fails when you need it. Good practice is to test these backups on separate test systems periodically to make sure they restore properly. Similarly, safety instrumented systems (SISs) need to assure that each safety instrumented function (SIF)/safety loop does what […]

Safety Instrumented Function Valve Selection

Posted in Final Control Element, Safety on Friday, July 7th, 2017. No comments yet
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Valves are critical components inside of safety instrumented functions (SIFs) since they do the work of touching the process flows to bring the plant to a safe state in the event of a safety demand. In a Valve magazine article, How Valve Selection Can Impact SIS in Refining Applications, Emerson’s Janine McCormick describes the important […]

Remote Partial Proof Testing Level Sensors

Posted in Level, Safety on Friday, June 30th, 2017. No comments yet
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For safety instrumented functions (SIFs), proof testing is the process of identifying undetected dangerous failures in the sensor, final control element and logic solver which comprise the SIF. Dangerous failures are those that could put the safety instrumented system (SIS) in a hazardous or fail-to-function state. If undetected, in the case of level measurements, this […]

Instrumentation Diagnostics and Safe, Reliable Operations

Posted in Safety, Temperature on Friday, June 2nd, 2017. One comment so far
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As technology has advanced in power and sophistication, its ability to self-diagnose and perform predictive diagnostics has too. In a Plant Engineering article, Using diagnostic functions to improve system safety, Emerson’s Mark Menezes shares examples of how these diagnostics are used to self-diagnose instrumentation problems as well as those in the surrounding production process. He […]