电压 :0--300V ±(0.25%读数+0.25%量程) 电流 :0.0005~2.5A ±(0.25%读数+0.25%量程) 功率 U×I ×功率因数=1.0:±(0.25%读数+0.25%量程) 功率因数 :0.20--1.00 ±0.02 频率 :45-65Hz ±0.05Hz
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