What are the Benefits of Identifying Deadtime and Ramp Rate?

What are the Benefits of Identifying Deadtime and Ramp Rate?

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #89.   In Tip #70, we learned that deadtime was the key to loop performance. The Control Talk...
How to Determine the Health of an Industrial pH Glass Electrode

How to Determine the Health of an Industrial pH Glass Electrode

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #86.   There is not a whole lot of current information on the response time of pH electrodes....
How to Use External-Reset Feedback for Cascade Control

How to Use External-Reset Feedback for Cascade Control

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #95.   The value of the external-reset feedback feature in PID controllers is becoming...
How to Achieve Process Simulation Fidelity

How to Achieve Process Simulation Fidelity

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #98.   The best way to classify process simulators is to look at the original intent of the...

Use Middle Signal Selection to Improve pH Measurement Reliability

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #88. Biopharmaceutical batches are often worth more than a million dollars. The product quality...
How to Optimize Batch End Points and Cycle Times

How to Optimize Batch End Points and Cycle Times

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #96.   When I was leaving for college, my Dad said, “Make sure you use a good grain analyzer to...
Butterfly and Ball Valves with Positioners Are Not Control Valves

Butterfly and Ball Valves with Positioners Are Not Control Valves

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #10. One of the more heated arguments I had with a client involved his extreme desire to use...
How to Make Reset Time and Feedforward Action Smarter

How to Make Reset Time and Feedforward Action Smarter

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #92.   The reset time can be approximated as a factor of the deadtime, but this dimensionless...

How to Select the Best Type and Size of Actuator for Tight Control

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #81. Since early in my career, I have always been glad to see a diaphragm actuator rather than...
Benefits of Using Sliding Stem Valves for Tighter Process Control

Benefits of Using Sliding Stem Valves for Tighter Process Control

The following tip is from the ISA book by Greg McMillan and Hunter Vegas titled 101 Tips for a Successful Automation Career, inspired by the ISA Mentor Program. This is Tip #80.   For pH control, where the requirements for precision are extraordinary, the reagent flow...

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