Calibration of Ultrasonic Meters Using Custody Transfer Systems as the Reference

This paper presents a method of calculating the meter factor (MF) to correct systematic errors and improve the pipeline operation accuracy. It includes the evaluation of the MF uncertainty and also the uncertainty of the ultrasonic-meter results corrected by a MF and the pressure and temperature correction factor. The procedure presented is based on the historical reports from the SCADA system. The results shown include a calibration of an ultrasonic meter using a dynamic measurement system as reference. The use of one register each minute was sufficient for the MF calculation for the ultrasonic meter flowrate output. It is recommended to use at least 12 typical batches.