论文部分内容阅读
本刊八○年第8期刊登的《关于“恒温控制电路”的改进》一文,我们认为该文介绍的电路还可以再简化,将耐压较高的二极管2CP19省去。此时R_1的阻值及额定功率也应作相应改变。我们在对我厂的二台RD—4型H_2分析仪传送器桥体的恒温控制电路改进中,采用了如图的电路。当K闭合后,可控硅控制极借用阳极电压触发而导通,绕在桥体外的加热线圈开始工作,桥体升温。当温度上升到给定值时,电接点水银温度计K_T接通,将控制极与阴极短路使可控硅强迫关断,停止加
This issue of eighty eight published in the “on the” thermostat control circuit "one article, we think the article describes the circuit can be simplified, the higher voltage diode 2CP19 omitted. At this moment, the resistance and rated power of R_1 should also be changed accordingly. We are in my plant two RD-4-type H_2 analyzer transmitter bridge temperature control circuit improvements, the use of the circuit shown in Figure. When K is closed, the SCR control electrode is borrowed and triggered by the anode voltage, and the heating coil wound around the bridge starts to work, and the bridge body heats up. When the temperature rises to a given value, the electric contact mercury thermometer K_T connected to the control electrode and cathode short-circuit the SCR forced shutdown, stop plus