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Process Control Case Histories by Gregory K. McMillan

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Pressure Control: Without Deadtime, I Might Be Out of a Job

Have you ever watched a chart recorder connected to a process pressure transmitter (as the pen hit the peg so hard that ink splattered out the top? If so, you probably wondered what happened to that textbook world where pressure loops were so easy they weren’t worth discussing. You are not alone if you have encountered tough pressure control problems. I have run into a few and am still here to talk about them. And what’s a few years lopped off a life expectancy, anyway?

THE DEADTIME THAT SHOULDN’T BE

I survived my pressure control problems thanks to two words of wisdom I got when I was 4 years old and sitting on my daddy’s knee. The secret passed from father to son on what turned out ...

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