Monthly Archive: March 2010

Mar
29

Exceptional Opportunities in Process Control – Peak and Integrated Error – Part 3

At my recent presentation to the ISA Saint Louis section meeting on “pH measurement”, I had several people around my age say how nice it was to see me still involved in advancing our profession. Maybe it was the beer and the top ten lists but just maybe it was also that I represent a …

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Mar
22

Exceptional Opportunities in Process Control – Peak and Integrated Error – Part 2

How does controller tuning affect on-stream time and environmental costs? The basic process control system (BPCS) forms the inner protective layer for safety instrumentation systems (SIS) as shown on slide 5 of Effects-of-Loop-Tuning-and-Dynamics-on-KPI.pdf. The performance of the BPCS loops must limit excursions to be well within the operating limits that correspond to the trip points …

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Mar
10

Exceptional Opportunities in Process Control – Peak and Integrated Errors – Part 1

If you increase the controller gain by the same factor that you increase reset time (e.g. double the gain and the reset time), how does it affect key performance indicators such as quality, yield, on-stream time, and environmental costs? If you make the valve and measurement faster, how does it affect these same KPI? If …

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