Method and apparatus for testing signal quality in a burner control system

摘要

A method and apparatus determine signal quality of AC input signals to a control system where the AC input signals and an AC system signal are phase-synchronous. A read cycle, for reading the AC input signals, is scheduled to be performed during periodic cycles of the AC system signal. The presence or absence of the AC system signal is determined. A number of good read cycles are counted where the good read cycles represent the read cycles performed when the AC system signal is present. A ratio is determined between the number of good read cycles counted during a predetermined time and a total number of read cycles scheduled to be performed during the predetermined time.