Patent ID: 6256590
Filing Date: 2001-07-03
Classification: G01F

Abstract:
An electromagnetic flowmeter signal processing apparatus for use with an electromagnetic flowmeter including a coil past which a fluid can flow, the coil being arranged so as to generate a magnetic field of strength dependent upon the magnitude of current supplied to the coil thereby to induce in said fluid a voltage indicative of a parameter of the fluid's flow, the signal processing apparatus comprising means for measuring the current supplied to the coil, means for measuring the voltage induced in the fluid and means for producing an output signal representative of the flow parameter and approximately proportional to the ratio of the measured voltage and the measured current, characterised in that the producing means is arranged to calculate or adjust the output signal in dependence on the measured current value to compensate for non-linear dependence of the field, and thus the induced voltage, on applied current.