四窗口同時顯示:電壓、電流、功率、功率因數(shù)/頻率4display:V,A,W,PForHz電流和功率上下限可設(shè)定,超限聲光報警 UpperandlowerlimitofWand Asetting,andalertwithsoundandlightwhenexceedthelimit.電壓量程Voltage: 10.0-500.0V電流量程Current: 0.005-20A量程自動切換Autorange精度Accuracy: (0.4%reading+0.1%range+1digit)