Acta Metrologica Sinica  2021, Vol. 42 Issue (1): 59-65    DOI: 10.3969/j.issn.1000-1158.2021.01.10
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Measurement Uncertainty Evaluation of Non-Automatic Weighing Instrument and its Application in Conformity Assessment
CAI Chang-qing,WANG Jian,CHEN Hang-hang,ZHONG Rui-lin,LI Xiao-meng
National Institute of Metrology, Beijing 100029, China
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Abstract  On determining the weighing performance of a non-automatic weighing instrument (NAWI) from a weighing test result, there are 2 kinds of misjudgment risks if simple acceptance rule is applied when the measurement result is close to the maximum permissible error. Taking the test results of 3 electronic balances of a same type as an example, the measurement uncertainty for the corrected indication error is evaluated, whose influences on the conformity assessment is analyzed. The three kinds of conformance probabilities were 95.45%, 80.6% and 18.1%, respectively. The experimental results show that in the measurement process of NAWI, the NAWI whose linear measurement load error meets the maximum permissible error limit may still have the risk of failing to meet the requirements of conformity assessment. In legal metrology, the evaluation of measurement uncertainty of NAWI is an effective method to reduce misjudgment results.
Key wordsmetrology      mass measurement      non-automatic weighing instruments      uncertainty      conformity assessment     
Received: 20 March 2020      Published: 19 January 2021
PACS:  TB932  
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CAI Chang-qing
WANG Jian
CHEN Hang-hang
ZHONG Rui-lin
LI Xiao-meng
Cite this article:   
CAI Chang-qing,WANG Jian,CHEN Hang-hang, et al. Measurement Uncertainty Evaluation of Non-Automatic Weighing Instrument and its Application in Conformity Assessment[J]. Acta Metrologica Sinica, 2021, 42(1): 59-65.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.01.10     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I1/59
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