FIELD: measurement technology. SUBSTANCE: digital self-correction voltmeter has in series connected increment unit 1, measurement range selection unit 2, analog-to-digital converter 3 and control and computing unit 4. Increment unit includes reference voltage source 5, two two-way switches, resistor, two controllable resistors, inverting amplifier and gate. EFFECT: possibility for checking and correcting measuring instruments. 7 dwg
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