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1 传统方法的不足试验一个电路有没有电,汽车电工习惯用划火或跳火的方法,该方法不需使用仪表,简单但不文明。试灯或电压-电阻表也只适用于传统结构汽车。而现代汽车上装用了许多电子装置,在检修汽车时,会碰到脉动电路、定时电路等,除检查电路、电阻外,还常要进行频率试验,此时试灯和电压-电阻表就不行了。一个电路中有无电压,用试灯检查就可以,但它却不能区分电压的高低。用电压表虽可测
A lack of traditional methods Test a circuit has no electricity, car electrician used to flash or flashover method, the method does not require the use of instrumentation, simple but uncivilized. Test lights or voltage - resistance meter only applies to the traditional structure of the car. The modern car with a lot of electronic devices installed in the overhaul of vehicles, will encounter pulse circuit, timing circuits, etc., in addition to check the circuit, the resistance, but also often test the frequency, then the test lamp and voltage - resistance meter will not It’s A circuit voltage, with the test light can check, but it does not distinguish between the voltage level. Although the voltage meter can be measured