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根据JJG351-1996工业用廉金属热电偶检定规程,利用K型热电偶温度变送器、SR23岛电调节器、PAD27功率调整器、WKJ-60热电偶检定炉构成热电偶检定点温度自动控制系统。采用调节器参数自整定的方法,去寻找检定炉温度点稳定时的最佳PID参数,保证热电偶检定由低温向高温逐点升温检定时,炉温偏离检定点温度不超过±5℃,当炉温升到检定点时,炉温变化小于0.2℃/min。
According to JJG351-1996 industrial metal thermocouple testing procedures, the use of K-type thermocouple temperature transmitter, SR23 island regulator, PAD27 power regulator, WKJ-60 thermocouple test furnace thermocouple test point temperature control system constitutes a automatic control system . Adopting the method of regulator parameter self-tuning to find the best PID parameter when the temperature of the test furnace is stable, when the temperature of the thermocouple is detected from the low temperature to the high temperature, the deviation of the temperature from the test point does not exceed ± 5 ℃ Furnace temperature rose to the test point, the furnace temperature changes less than 0.2 ℃ / min.