... Testing voltage, current and phase 2. High precision and accuracy 3. Portable and handheld 4.Dual-channel input measuring I. IntroductionDF-200 ... phase tests, it is in high-precision, low price, portable hand-held, dual-channel input measuring.Easy to measure the ... Other Technical Features1. Display, three and half2. Sampling Rate, 3 times per second3. Power Supply, Single 9V laminated cell, current ...