读了《计量技术》87年第4期<工厂计量与检测>副刊发表的“磁电式仪表内阻的测定方法”一文后,在应用中,我将该文所述的测量线路稍加改进,串入一块直流电流表A监测其回路电流,就可不需计算而方便地在电阻箱R,上直接读出被测仪表G的内阻。图1为改进的测量线路,对于灵敏度较高的仪表则用图2的接线图。 Read the “Measurement Technology” No. 87, No. 87 “Measurement and Measurement of Plants,” the supplement published “magnetic resistance meter measuring method,” a text, in the application, I will slightly increase the measurement line described in this article , String into a DC ammeter A to monitor the loop current, you can easily calculate in the resistance box R, read out the measured resistance of the instrument G without resistance. Figure 1 is an improved measurement circuit, for the higher sensitivity of the instrument using the wiring diagram in Figure 2.