1.Single-phase field use checking 2.Transformer's self-calibration 3.Waveform display 4.Harmonic testing I. IntroductionDFC~S200 is a single phase portable reference meter, which is used to check many kinds of electricity meter. With small size, light weight, strong function, it is very portable to check meter on-site.II. Features & Functions1. 0.1% portable single-phase electric source ...