直流检流计是精密测量直流电参数时常用的重要配套设备之一。目前广泛使用的是复射式检流计,如国产的 AC15型等,它一般多作为0.1级以上的电桥和电位差计的指零仪。由于这类检流计的灵敏度高,测量时只要回路稍不平衡,光标就产生剧烈的偏摆,因此在使用时常感不便。为了克服这一 DC galvanometer is a precision measurement of DC parameters commonly used in one of the important ancillary equipment. Currently widely used is the complex type galvanometer, such as domestic AC15 type, it is generally more than 0.1 as a bridge and potentiometer refers to zero instrument. Due to the high sensitivity of such galvanometer, the measurement as long as the loop is slightly unbalanced, the cursor has a sharp bias, so often feel inconvenient. In order to overcome this one