... ..CE certification 4ACV: 5Hz-300kHz; 5.ACI: 5Hz-10kHz Digital multimeter TH1961 is a high speed,high accuracy , 1,199,999 ... in the meter reduces the system density and volume.TH1961 bench multimeter adopts special input over load protect circuit which can stand ... , with ALARM at HI/LO (selectable)Communication interface RS232C, SCPI bench Digital Multimeter TH1961