Experimental Study on Volume Determination of Weights by Double Weighting in Air Method
SU Yi1,XIONG Zhongqi1,ZHENG Xiaolan2,CHENG Liyuan1
1. Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
2. Yunnan Institute of Measuring and Testing Technology, Kunming, Yunnan 650228, China
Abstract:A comparative experimental study was conducted on the volume determination of standard weights with a mass of 1g~5kg, using the double weighing in air method and the hydrostatic method. A method for measuring the volume of auxiliary weight plates was proposed, which solved the problem of small weights ranging from 1g to 5g that cannot be directly loaded onto the scale plate. The uncertainty of weight volume measurement was evaluated by Monte Carlo method, and it was found that the consistency of the weight volume and its uncertainty measured by the double weighing method and hydrostatic method was very good, and the relative uncertainty of the weight volume decreased with the increase of the nominal mass when the nominal mass of the weights was 1g~1kg, and increased with the increase of the nominal mass when the mass was more than 1kg.
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