ARM-based power metering on-site monitoring device

The present utility model relates to an ARM-based power metering on-site monitoring device, wherein a photoelectric sampler, a manual switch and an electronic meter pulse input terminal are respectively connected with a pulse signal shaping circuit. The pulse signal shaping circuit is connected with an ARM embedded controller. Power metering chip and the ARM embedded controller are in bi-directional connection. The ARM embedded controller is respectively connected with a display module, a digital clock chip, a printer and a power supply module. According to the technical scheme of the utility model, two power metering chips are adopted. Since the power metering chips are specifically high in current channel precision and good in stability, the voltage is sampled by the power metering chips. In this way, the on-line measurement of both a primary loop and a secondary loop of metering equipment can be conducted at the same time, and the overall accuracy of instruments is improved. Based on an ARM processor, a man-machine interface operation part is easier to realize, more powerful in function and more user-friendly to operate through the real-time monitoring process of composition errors, electro meter errors, transformer errors and other key metering parameter.