Automatic, on-line calibration of flowmeters

This paper describes a method of calibrating digital output flowmeters of the turbine meter type whilst the meters are in use. No interruption of the metering process is involved during calibration. In the specific application for which the system was designed, the volumes of batches of refined petroleum products `shipped¿ in an oil pipeline are metered to an accuracy of 0.05%. Meter calibration cycles are initiated automatically when product types or flow rates change.