FIELD: measurement technology. SUBSTANCE: meter measures internal phase delay of each of two pairs of input channels and then subtracts delay associated with each pair from actual measured data. When one pair of channels measures actual flow rate, other pair of channels measures inherent internal phase delay, channels being changed over between these functions constantly and in cycles. Since both pairs of channels are changed over in cycles at sufficiently high speed, current value of internal phase delay for each pair of channels indicates accurately any variations caused by temperature and then taking place in operation of this pair, thus removing erroneous components caused by temperature from flow rate measurements. In addition, meter measures flow-through tube temperature for removal of errors caused by temperature. Moreover, meter also measures and renews inherent value of mechanical zero by using only measurements of Δt, obtained in absence of flow rate and having sufficiently low noise content. This value of mechanical zero is subtracted in sequence from measurement data caused by flow rate to remove errors from them which, otherwise, may remain. EFFECT: reduced flowmeter error. 22 cl, 19 dwg
