FIELD: measurement of electrical quantities. SUBSTANCE: device has reference-frequency oscillator 1, phase detector 2, modulator 3, high-frequency oscillator 4, frequency divider 5, attenuator 6, terminals for connecting equipment 7 being monitored, analog-to-digital converter 8, register 9, controller 10, read-only storage 11, counter 12, digital-to-analog converter 13, amplifier 14, RMS voltmeter 15, display unit 16, control and synchronization unit 17 with relevant ties. EFFECT: improved design. 3 dwg
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