Walchem, Iwaki America Inc.

Walchem, Iwaki America Inc.

Understanding Time Proportional Control

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Courtesy of Walchem, Iwaki America Inc.

Lori McPherson, Regional Sales Manager for Iwaki America, was published in the Industrial Waterworld Jan/Feb 2013 edition. Her article titled 'Understanding Time Proportional Control' details the following.

An underused control strategy that offers significant benefits is Time-Proportional Control (TPC). Unlike traditional proportional or even PID control that require a varying output to a modulating control device, time-proportional control can achieve a proportional control response to process variation using an on/off device by varying on and off times in a defined control period. The on/off device is generally a simpler, less expensive control device.

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