... ACV,DCI/ACI,Ω2W/Ω4W,Frequency/period,Diode Test /Continuity,dB/dBm, cover all basic measurement ... .TH1951 adopts special input over load protect circuit which can stand 1500V voltage between input and ... display: all measurement parametersDual display: V AC+V DC, I AC+I DC, V AC+Hz, I AC+Hz, Readout ... block of the given reading number according to set accuracyComparatorTo judge HI, IN, LO and display, ...