Verification regulation of dc digital amperemeter 直流数字电流表试行检定规程
2.
When measuring the magneto performance parameter ， we find that the instrument which use to measure voltage and current is still the simple voltmeter and amperemeter in the national standard ， and the form of wave that we observed is anomaly . based on the measure principles , it obviously ca n ' t be used to do quantitative analysis ； because the discharge process of ignition system is quite complex , accompanies with very strong electromagnetism interference , and the ignition current and voltage are variable ， it make the measure of ignition energy become a difficult thing of ignition system performance detection 在磁电机常规测量时，发现在国家标准中用于测量电压、电流的仪器仍然是普通的电压、电流表，而观测到的波形多为不规则的形状，根据测量原理，显然不能用其来做定量的分析；由于点火系统的放电过程比较复杂，伴随着很强的电磁干扰，点火电流、点火电压都是变量，使得点火能量的测量成为点火系统性能测试的一个难点。
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