| 摘要 |
FIELD: the proposed invention refers to electric measuring technique and is assigned for checking up the shunts of direct current in a broad diapason of currents. ^ SUBSTANCE: the task on solving of which this invention is directed is in development of a technical decision which ensures increasing accuracy of checking up the shunts of direct current in a broad diapason of measured magnitudes at using a source of high constants of current of low stability. The proposed arrangement for checking up the shunts of direct current has a reference resistance measure fulfilled in the shape of three resistors connected in parallel with an irregular error with possibility of switching off from the measuring circuit and changing of the coefficient of transformation of the resistance measure, a comparator of voltage and a source of direct current. At that the voltage comparator is fulfilled in the shape of two converters of constant voltage into a proportional alternating voltage and an electric magnetic comparator of current, each of the converters has a modulator, an amplifier of alternating voltage, an inductive divisor of voltage and a demodulator. At that the voltage from the output of the modulator is increased with the amplifier and the voltage from the output of the amplifier is fed through an inductive divisor of voltage to the demodulator from whose output a feedback signal is given on the input of the modulator. ^ EFFECT: increases accuracy of checking up the shunts of direct current. ^ 1 dwg |
