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Posts Tagged ‘safe failure fraction’

In-Situ Proof Test Coverage for Coriolis Flow and Density Meters

Posted in Flow, Safety on Thursday, April 4th, 2013. 2 comments so far
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Process safety is a top concern for manufacturers with hazardous areas. I received a question on a blog post, Calibrating Coriolis Flowmeters In-Situ: What is Emerson’s statement of proof test coverage (e.g. for SIS testing) for the in-situ tests described in this article? I turned to Emerson’s Tom O’Banion on the Micro Motion Coriolis flow […]

Q and A on Digital Valve Controllers and Solenoids in Safety Applications

Posted in Final Control Element, Safety on Tuesday, August 21st, 2012. No comments yet
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A reader emailed some great questions to an earlier post, Clarifications on the Use of the DVC6000 SIS in Safety Applications. The post, featuring the thoughts of Emerson’s Riyaz Ali, addressed misconceptions about the use of digital valve controllers and solenoids in safety instrumented functions (SIFs). I turned to Riyaz to help me address the […]

Considering the Whole Loop in Process Safety

Posted in Project Services, Safety on Wednesday, August 11th, 2010. No comments yet
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In our continuing look at elements in the IEC 61511 process safety lifecycle, I uncovered an excellent presentation, Safety Instrumented Systems – Considering the Whole Loop, by Emerson’s Andy Crosland. You may recall Andy from a recent process safety seminar series in the U.K. Andy presents at Institute of Measurement and Control regional meetings from […]

Control Systems for SIL 1 Safety Applications?

Posted in Safety on Friday, March 5th, 2010. 4 comments so far
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I received a great question today about the safety integrity level (SIL) of a distributed control system (DCS). In this case, the question was specific to the DeltaV system: Can you please advise if the Emerson DeltaV DCS has a SIL rating i.e. ‘0’ or ‘1’? I understand that the DeltaV SIS has a SIL […]