Video: Alternate Control Configuration for Off-Gas Process

By Cecil Smith, president of Cecil L. Smith, Inc.

The temperature of the hot air is determined by the opening of the fuel gas valve and the opening of the fresh air damper. Based on the process understanding from previous videos, this video proposes alternate control logic for these two final control elements.

To access the entire video series from Cecil Smith, visit our video page.

Cecil Smith is president of Cecil L. Smith, Inc., Houston, a firm specializing in automation technology that he founded after leaving the faculty of Louisiana State University. Also cited as one of the 50 most influential people in the field, he teaches courses on control topics and has authored or co-authored 14 books, including “Digital Control of Industrial Processes and more than 100 articles. You can email him at He is also one of our experts in our Ask the Experts forum. You can pose your instrumentation and control questions to him here.