Title :
A buoyancy-free mass comparator with precision better than 10-6 for use in a superconducting magnetic levitation system
Author :
Fujii, Yusaku ; Shiota, Fuyuhiko ; Miki, Yukinobu ; Nezu, Yoshiaki ; Makishita, Go ; Hara, Ko
Author_Institution :
Nat. Res. Lab. of Metrol., Ibaraki, Japan
fDate :
4/1/1997 12:00:00 AM
Abstract :
A system for measuring mass without the necessity of correcting for the buoyancy of air with a relative standard uncertainty better than 10-6 has been developed. The system is intended for use in determining the mass of the floating body in the superconducting magnetic levitation system
Keywords :
magnetic levitation; mass measurement; measurement errors; measurement standards; superconducting devices; vacuum techniques; National Research Laboratory of Metrology; buoyancy of air; buoyancy-free mass comparator; floating body mass determination; low pressure He environment; mass measurement; mass stability; relative standard uncertainty; superconducting magnetic levitation system; vacuum balance; vacuum weighing; Atmospheric measurements; Density measurement; Helium; Laboratories; Magnetic levitation; Magnetic materials; Measurement standards; Superconducting materials; Temperature; Uncertainty;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
