Development of a high-accuracy 500 kg mass comparator for improved weight calibration capability. (January 2017)

• Record Type: Journal Article
• Authors: Sun, Jianxin; Ueki, Masaaki; Ueda, Kazunaga
• Is Part Of: Measurement. Volume 95(2017)
• Page Start: 418
• Page End: 423
• Publication Date: 2017-01
• Subjects: Large weight -- Mass comparator -- Knife-edge; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2016.10.036
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: A high-accuracy 500 kg mass comparator with 0.01 g readability has been developed. It adopted an electronic balance and a two-stage lever system with knife-edges. It reduced calibration uncertainties of large weights by 34–45%. Abstract: A high-accuracy 500 kg mass comparator with a readability of 0.01 g has been developed at the NMIJ/AIST in order to improve calibration capabilities for large weights from 100 kg to 500 kg. This newly developed mass comparator uses a high-accuracy electronic balance as the sensor and a high-sensitivity two-stage lever system with knife-edges to expand the maximum weighing capacity. This design made it possible to reduce the calibration uncertainties of large weights by 34–45%. This paper reports the basic design of the mass comparator and the improved results for large weight calibrations at the NMIJ.