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一、电子电位差计的调修1.我单位有几台 EWY—103型和 EWY—104型电子电位差计在使用中,突然不工作了。经对仪表各连接线路、电源、桥路、振动变流器、电子管等检测,均未发现异常,判断故障出在放大器。为此,用500型万用表测定电子管座各极电压,发现电压放大部分的第一级板压很低(仅2V),有的是第二级、三级板压很低,致使电子管不工作,无信号输出。
First, the electronic potentiometer adjustment 1. I have a few units EWY-103 and EWY-104-type electronic potentiometer in use, suddenly did not work. After the instrument of the connection lines, power supply, bridge, vibration converter, tubes and other testing, found no abnormalities, determine the fault in the amplifier. To this end, with a 500 multimeter to measure the pole seat voltage, found that the first part of the voltage amplification part of the board pressure is very low (only 2V), and some are the second stage, the three plate pressure is very low, resulting in the tube does not work, no signal Output.