Instrument unites before itself the functions of digital multimeter and ohmmeter for measuring the small resistances, measures the contact and internal resistance and the voltage of the power sources. Because of the regimes of measurements Ohm and before, the simultaneous possible measurement and the comparison of the internal resistance of the sources of power and voltage of the broken circuit (U[kholost]. motion) the measurement of low resistances testing the power sources high resolution (1 µ[Om] before 30 m range) the rapid time of the reaction of 84 m[s] (60 Hz).