Special program running under Windows 98/2000/XP/Vista provided for communication with PC,both English and Chinese version. 1. Input voltage,current,power,PF,frequency,phase angle, total harmonic and 0~50th harm onic components 2. Input(DC) 3. Input voltage,current,power 4. Output(AC) 5.Test lamp voltage,lamp current,lamp power 6. Test changing curve and data of lamp voltage,lamp current within 2 ...