2006 Volume 72 Issue 718 Pages 1551-1558
The uncertainty of mass measurement for the hydrocarbon flow calibration facility, which is a national standard of Japan, has been evaluated experimentally and analytically in detail in accordance with the “ISO Guide to the expression of uncertainty in measurement”. The kerosene and light oil flow calibration rigs have a large weighing tank with a 10 t weighing scale and a small tank with a 1 t weighing scale, one of which is selected to measure the reference flow rate depending on the flow rates. The combined standard uncertainty is estimated to be between 2.7 and 7.7×10-5s which varies depending on the flowrate and used liquids. The main source of combined uncertainty of mass measurement at high flow rate is the correction factor for weighing scales. On the other hand, uncertainty due to the loss of oil caused by oil mist and vapor in the diverter and in the weighing tank is dominant to the uncertainty of mass measurement using the kerosene 10 t weighing scale and 1 t weighing scales at low flow rate.
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
