RESEARCH ON MICRO-GRAM WEIGHT STANDARDS BELOW 1 mg IN NIM

M. H. Hu, J. Wang, Y. Zhang, C. Q. Cai, R. L. Zhong, H. Yao, J. A. Ding

Abstract

Micro-gram weights have potential applications for the calibration of small force measurements and the sensitivity of mass comparators with high accuracy. However, the traceability of micro weights below 1 mg to the unit of SI is not identified in the OIML recommendation R111. In this paper, Micro weights made of aluminum ranging from 500 µg to 100 µg are tested with mass comparator (UMT5). The uncertainty of measurement results indicate that for 500 µg weight, the extended measurement uncertainty can be down to 3 µg. The calibration results indicate that the biggest uncertainty contribution is still from the standard weight.

Keywords

microgram weights, mass comparator

Download

IMEKO-WC-2012-TC3-O4.pdf

DOI

-

IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

Back to the proceedings