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| Subdivision Weights Comparison in China |
| WANG Jian,DING Jing-an,YAO Hong,ZHONG Rui-lin,CAI Chang-qing,ZHANG Yue,WANG Xiao-lei |
| National Institute of Metrology, Beijing 100013, China |
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Abstract According to the technical requirements of recommendation OIML R111 and JJG99-2006 verification regulation of weights, weights comparisons including 100g and 200mg are organized by National Institute of Metrology (NIM), as a pilot laboratory. There are 113 laboratories to participate the weights comparison for 100 g and 200 mg. The comparison manner of petal type is used in the transfer process of weight sample. The results of comparison are evaluated in accordance with normalized error En. The results from 2009 to 2010 show weight calibration results of 6 participating laboratories are not satisfied, which is 5.4 % of total results. The possible causes of these results are analyzed.
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2013, Vol. 34 
