Digital multimeter with 200K high-speed A/D sampling, 4000 counts auto range switching, graphical waveform display during measurement. High reliability with calibration technology memory and calibration, eliminating potentiometer adjustments. Store 100 sets of data and 10 waveforms independently. Able to retain shape waveform and data during measurement, easy to view and analyze. Display historical data and real-time measurement on the same screen with special record playback mode for comparison easy.