Kern, A.

APC Performance LLC, Phoenix, Arizona

Allan Kern is a control engineering consultant withAPC Performance, LLC, where he is responsible for advanced process control, including XMC. He has35 yr of industrial process control experience and has authored numerous papers on a wide range of practical process automation solutions. He earned a BS degree in chemical engineering from theUniversity of Wyoming, and holds professional engineering licenses in chemical engineering and control systems engineering.

The lost art of proportional band, and the accidental art of performance monitoring

Kern, A., APC Performance LLC

Most control engineers know that proportional band and controller gain are largely interchangeable terms—both terms refer to the proportional setting of a proportional-integral-derivative (PID) controller and are commonly used by control system manufacturers.