Monthly Archive: April 2010

Apr
22

Deminar #2 Review – PID Control of Valve Sticktion and Backlash (How to Eliminate Continual Oscillations with the “Integral Deadband” PID option)

You can click on the above to view and hear the recording of the Deminar. The second Deminar answers two questions. The first question “Why? (Why do I write so much stuff and why I am I doing these Deminars and setting up free worldwide access to generic loop and unit operation labs?) is answered …

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Apr
13

Deminar #1 Review – PID Control of Sampled Measurements (How to Eliminate Oscillations from Analyzers and Wireless Measurements with a PID Enhancement)

The first Deminar is history. The seminar-demo showed how an enhanced PID controller can reduce cycling caused by sampled measurements. The benefits are not only the obvious one of less process variability but includes extending valve packing life by reducing the accumulated valve travel and battery life of wireless measurements by reducing the number of …

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Apr
05

Interactive Opportunity Assessment – Introduction

When I first started teaching process control to junior and senior chemical engineers at Washington University in Saint Louis after retiring from Solutia, the students were less than receptive to my introduction of stuff they actually needed to know on the job. Except for the couple of students who were summer interns at Anheuser-Busch, my …

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Apr
02

Exceptional Opportunities in Process Control – Peak and Integrated Error – Part 4

Let’s pull together this series on errors and conclude with a check list. The idea was prompted by perusing a popular book written on just the value of check lists. I didn’t think you could write a book on just one concept but the result of saving lives for surgical procedures is impressive. I know …

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