火花测试器是一种便携式测试装置(图1)。其放电间隙可在1～15毫米范围内变化。通过目视火花放电状况或根据放电声音来判断点火系次级(高压)回路中的故障所在。该测试器的显示板可同时指示出放电间隙和放电电压。放电间隙在5毫米以下时为红色区域,此时电压约为13000伏;放电间隙5～9毫米时为黄色区域;此时的放电电压为18000伏;放电间隙9～15毫米时为绿色区域,电压为18000～20000伏。高压接线柱的形状跟火花塞顶部接线 Spark tester is a portable test device (Figure 1). The discharge gap can vary from 1 to 15 mm. Determine the fault in the secondary (high-voltage) circuit of the ignition system by visualizing the spark discharge condition or by the discharge sound. The tester’s dashboard shows both the discharge gap and the discharge voltage. Discharge gap of 5 mm below the red area, then the voltage is about 13000 volts; discharge gap 5-9 mm yellow area; discharge voltage at this time is 18000 volts; discharge gap of 9 to 15 mm for the green area, Voltage is 18000 ~ 20000 volts. The shape of the high voltage terminal is connected to the top of the spark plug