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诊状:XCT—191、K、0～1100℃、1级仪表在运行中发生故障.仪表温度指示正常,但由于PID调节电路板发生故障,使与之配套的ZK—100可控硅电压调整器“自动”调节不能工作,影响到结晶机的温度控制.一、仪表故障检查经查,仪表无信号输出,以致影响到ZK—100仪表改变触发脉冲的相移来控制晶闸管的导通角,故使整套设备不能正常进行温度控制.拆下XCT—191仪表,用校验讯号发生器及电位差计进行校检,仪表示值误差及变差均在精度允差范围内.后又检查XCT—191仪表调节动作.按图1所示接好检查电路.
Consultation: XCT-191, K, 0 ~ 1100 ℃, a fault in the operation of the instrument I. Instrument temperature indicates normal, but due to the PID regulator circuit board failure, and its accompanying ZK-100 SCR voltage adjustment First, the instrument failure inspection by the investigation, the instrument no signal output, which affects the ZK-100 instrument to change the trigger phase shift to control the thyristor conduction angle, So the whole set of equipment can not be normal temperature control.Remove the XCT-191 instrument, with the calibration signal generator and potentiometer for calibration, the instrument shows the value of error and variation are in the accuracy of the tolerance range.And then check the XCT -191 Instrument adjustment action. Check the circuit as shown in Figure 1.