FIELD: measurement technology. SUBSTANCE: invention is intended for measurement of phase difference between output signals in Coriolis flowmeter. Output signals of flowmeter go to signal processing device incorporating three measurement channels each one including multipole filter with relatively large phase shift that ensures narrow bandwidth, operational amplifier and level detector. Pair of channels switches over in turn in the course of sequential time intervals between calibration and operational modes. One and same input signal comes under calibration mode to inputs of both channels in the course of one time interval and thanks to it natural phase shift between two channels is determined during measurement of output signals. During next time interval mentioned channels are switched over to operational mode when corresponding signal of flowmeter goes to input of each channel. Phase shift between output signals of channels is measured by means of two counters. Microprocessor computes true phase difference between input signals of channels. EFFECT: enhanced measurement accuracy due to elimination of errors related to phase shift between channels. 8 cl, 2 dwg
