This instrument is a high precision DC energy meter test equipment.The highest accuracy is 0.02%. And it has wide test range 0-115V and 0-600A. It mainly test the DC energy meter error. Features: 1.test all kinds of DC energy meter,DC power meter 2.Accuracy: 0.02%,0.05% 3.Portable design 4.Can store 10000pcs meter data 5.Overload, short circuit,open circuit protection