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The basic elements of control design are safety, process control, process verification, machine control, productivity, repeatability, and ease of setup. Effective systems of quality control/quality assurance are essential for heat treating practices. This article provides information on process control modes, as well as on process signatures of some items that require control, monitoring, verifying, and logging methods. It provides information on programmable logic controllers that have become efficient in machine control and monitoring. The article describes possible noise issues, National Electric Code clearance requirements, monitoring requirements, and machine accuracy that need to be considered when designing induction equipment.

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Timothy Kennamer, Process Control, Monitoring and Quality Assurance Specifics for Induction Heating, Induction Heating and Heat Treatment, Vol 4C, ASM Handbook, Edited By Valery Rudnev, George E. Totten, ASM International, 2014, p 723–729,

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