METHOD FOR TEMPERATURE COMPENSATION OF DIFFERENTIAL TRANSMITTERS HAVING LINEAR CHARACTERISTICS Russian patent published in 2008 - IPC G01D3/28 

FIELD: measuring instruments.

SUBSTANCE: constant values k and C are determined from experimental data obtained in a static mode at a variable ambient temperature by the following linear regression function y=k-F(X₀,T)+k_1X-X+C, where y is the difference between signals of a reference primary element (PE) and a measurement one of the transmitter. The transmitter signals are converted from analog into digital ones during the measurement. A computing device calculates the value of a measured quantity X from the formula: where F(X₀,T) is a numerical value of voltage from the reference PE, F(X₁,T) is a numerical value of voltage from the measuring PE and 1/k_1X is a proportionality coefficient, determined during calibration of the transmitter.

EFFECT: increasing the accuracy of measurements.

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