ET-997 技术指标基本功能量程基本精度直流电压40mV (0.5%+6)400m/4/40/400V (0.5%+5)1000V (1.0%+5)交流电压40m/400mV (1.6%+10)4/40/400V (0.8%+6)750V (1.0%+8)直流电流400u/4000u/40m/400mA (1.0%+10)20A (1.2%+10)交流电流400u/4000u/40m/400mA (1.5%+15)20A (2.0%+15)电阻400? (0.8%+5)4K/40K/400K/4M? (0.8%+4)40M? (1.2%+5)电容40nF (2.5%+6)400n/4u/40uF (3.5%+8)400uF (5.0%+8)摄氏温度-20℃-1000℃ 300℃: (1.0%+5) 301℃: (1.5%+15)华氏温度-4℉-1832℉ 572℉: (1.0%+5) 573℉: (1.5%+15)频率100/1K/10K/100K/1MHZ (0.5%+4)30MHZ (2.0%+5)占空比10%-90% (2.0%+5)