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当前热处理试验室广泛使用的全国统一设计SX系列和RSX系列箱式电阻炉,温度控制器均为二位调节式,这种控制器使被控制的炉温总是在较大的范围内波动,控制精度较低。尤其对那些热惯性大的炉子,采用二位调节式控温,控制精度就更低,有时温度波动可达给定温度的百分之十几。这样低的控制精度,远不能满足金属材料研究中热处理工艺的要求。为了提高炉温控制精度,目前广泛采用了PID(即比例、积分、微分)调节方式。本装置即为此目的而研制的。其温度控制精度可达±1℃和±2℃。一、工作原理本装置采用了ZK-03三相可控硅电压调整器与XCT-191型动圈式电流输出PID温度指示调节仪配套使用,以控制三相电阻
The heat treatment laboratory widely used in the national uniform design SX series and RSX series box resistance furnace, the temperature controller are two adjustable, the controller so that the furnace temperature is always controlled in a large range of fluctuations, Low control accuracy. Especially for those large thermal inertia furnace, the use of two-mode control of temperature, lower control accuracy, and sometimes temperature fluctuations up to a given temperature of dozens of. Such a low control accuracy can not meet the requirements of the heat treatment process in the research of metal materials. In order to improve the accuracy of temperature control, PID (ie proportional, integral, differential) adjustment method is widely used. The device is developed for this purpose. Its temperature control accuracy of ± 1 ℃ and ± 2 ℃. First, the working principle The device uses a ZK-03 three-phase thyristor voltage regulator and XCT-191-type dynamic current PID temperature indicator output supporting the use of regulator to control the three-phase resistance