The Digital Manual Device of the DX Series are convenient to use due to its specifically structured coils and electrical machines. The DS integrates 2 tests, impulse/surge, and DC high-potential. It comes with a leakage current calculations and insulation resistance. The test results and wave forms can be stocked in the memory of the testers. They can be instantly printed using a traditional printer or moved to a computer. The surge test is done using the latest IGBT technology.