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我们根据生产实践的需要,装制了一台比例式控温仪,可自动控制热压机电加热器的温度。这种按比例式控制原则设计的控温仪较一股控温仪的精度高,可达±0.2℃。尤其在保温条件差的情况下,仍可满足一定要求的温控效果。又由于采用厂桥式电路,可在150℃～500℃的范围内作恒温控制。图1是控温仪的方框图,图2是电路原理图。控温仪主要由铂热敏电阻、交流电
According to the needs of our production practice, we have installed a proportional temperature controller that can automatically control the temperature of the thermoelectric heater. This kind of proportional control principle design of temperature control instrument than a temperature control instrument of high precision, up to ± 0.2 ℃. Especially in the case of poor insulation conditions, can still meet the requirements of the temperature control effect. And because of the use of plant-bridge circuit, in the range of 150 ℃ ~ 500 ℃ for temperature control. Figure 1 is a block diagram of the temperature controller, Figure 2 is the circuit diagram. Temperature controller mainly by the platinum thermistor, AC