电流表除用来测量蓄电池充、放电流强度之外,还可根据电流表的异常状态,去分析、判断充电电路的故障,其前提是电流表没有损坏及故障。 (1) 表指针指在“0”位不动。汽车、拖拉机在起动发动机时,电流表的指针应指向“一”的一侧,且电流值较大。如此时指针在“0”位不动,则故障发生在蓄电池至磁力线圈的电路中,汽车可确定在低压电路故障,如接线有短路,保险丝熔断,磁力线圈损坏等。而当发 In addition to the ammeter to measure the battery charge and discharge current intensity, but also according to the ammeter abnormal state, to analyze and determine the fault of the charging circuit, the premise is ammeter without damage and failure. (1) Table pointer refers to the “0” bit does not move. Car, tractor When starting the engine, the ammeter pointer should point to “one” side, and the current value is larger. In this case, the pointer will not move at “0” position, and the fault occurs in the circuit of the battery to the magnetic coil. The automobile may determine that there is a fault in the low-voltage circuit, such as short circuit of the wiring, blown fuse and damage of the magnetic coil. And when hair