1622 国家標準としての石油流量計校正設備の開発

概要

論文の詳細を見る
A new primary standard for hydrocarbon flow measurements has been constructed at National Metrology Institute of Japan. The facility is designed to calibrate hydrocarbon flowmeters from 50mm to 150mm in diameter, at flow rates from 3 to 300m^3/h by using light oil and kerosene as the working fluids. The calibration procedure is based on a static-gravimetric method with flying start and finish. As a result of introducing a newly developed diverter system and other sophisticated equipments, the expanded uncertainty of the calibration has been proved better than 0.03% for volumetric flow rates, which enables calibration service with the smallest uncertainty in the world. The dominant sources of combined uncertainty of flow rate are uncertainties in the measurements of the mass of liquid in the weighing tank and the density of the liquid through the flowmeter.
社団法人日本機械学会の論文
2003-08-05