Functions:
◆   Input(AC、DC、AC&DC)
      Input voltage,current,power,PF,frequency.
◆   Output(AC、DC、AC&DC)
      Output voltage,current,power
◆  Input accuracy: ±(0.4% reading+0.1% range+1 digit)
◆   Output accuracy: ±(0.4% reading+0.1% range+1 digit)
◆   Frequency response up to 1MHz lrms, content to every LED power
◆   Display input and output parameters simultaneously with 8 windows, also the efficiency of LED driver, convenient for
      comparison and analysis
◆   Input and output parameters tested simultaneously within 1 second
◆   Parameters can set upper and lower limit, acousto-optic alarming above limit
◆   Achieve isolation among input analog circuit, output analog circuit and digital processing circuit, not only the ability of
      anti-interference is improved greatly,but also the interference which the instrument brings to the driver under test is reduced
      greatly.
◆   Offer HANDLER interface for connecting external equipments to do massive and fast inspection
◆   RS-232 interface offered, standard communication protocol solidified inside the instrument, with which, users can write
      programs for the second time development and expand functions freely.