Last week at the Emerson Exchange conference, I caught up with Emerson's Riyaz Ali. You may recall Riyaz from many safety instrumented system-related posts. We discussed some of the trends in integrated positioners + solenoid valves + limit switches + valve position...
1oo2
Redundancy and Diagnostics in Safety Instrumented System Sensors
This past Emerson Exchange conference has a treasure trove of presentations as it does every year. I've gone into the trove and mined this presentation, Measurement Diagnostics in Safety Instrumented Systems, by Emerson's Mark Menezes. The presentation is based on an...
Q and A on Digital Valve Controllers and Solenoids in Safety Applications
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 System Architecture Diagnostics
The language of process safety is filled with its own jargon. Architectures are described as 1oo1, 1oo2, 2oo2, 2oo3, etc. The "oo" means "out of". So, 1oo1 means one-out-of-one. William M. Goble and Harry Cheddie wrote a book, Safety Instrumented Systems Verification...
Considering the Tradeoffs in Safety-Certified Sensors
Emerson's Dale Perry alerted me to a great article on safety-certified sensors in the November 2008 issue of Control Engineering magazine. Dale manages the Rosemount pressure measurement line of products. The article, Practice Safe Sensing; Safety-certified sensors...
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The opinions expressed here are the personal opinions of the authors. Content published here is not read or approved by Emerson before it is posted and does not necessarily represent the views and opinions of Emerson.