Bilateral comparisons on COOMET Project 684/MD/16 “Pilot comparisons of national standards in the field of gas flow”

IF 0.1 Q4 INSTRUMENTS & INSTRUMENTATION
D. Serediuk, Yuriy Pelikan, Volodumur Gulyk, O. Bas
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Abstract

Abstract The article describes the procedure for performing international bilateral comparisons of the national measurement standards of the units of gas volume and volume flow in Ukraine and Moldova. The comparisons were carried out within COOMET Project 684/MD/16 “Pilot comparisons of national standards in the field of gas flow”. The list of reference standards that took part in comparisons is indicated. The range of gas volume flow, in which the comparisons were carried out, is from 0.5 m3/h to 50 m3/h. For the flow range from 0.5 m3/h to 1 m3/h, a drum-type meter was used, and for the range from 2 m3/h to 50 m3/h, comparisons were performed using a rotary gas meter. It is indicated that the national state primary and secondary standards of the gas volume and volume flow units took part in the comparisons from Ukraine, while from Moldova it was the national standard of the gas volume flow unit. A brief description of the national measurement standards and the principle of reproduction of the gas volume and volume flow units is presented. In particular, it was noted that the primary and secondary standards of Ukraine are built on the basis of bell-type prover, and the standard of Moldova combines a piston and bell-type prover. The method of calculating, calculation of expanded uncertainty and determining the degree of equivalence of the national standards of Ukraine and Moldova are demonstrated. The results of bilateral comparisons in the form of Table 1 are presented and shown in Fig. 4. The degree of equivalence of the national standards does not exceed 0.41, which indicates that the primary and secondary standards reproduce the gas volume and volume flow units with declared uncertainties, and transfer standards retain their metrological characteristics throughout the cycle of comparisons. General conclusions are drawn about the success of bilateral comparisons.
关于COOMET项目684/MD/16“天然气流量领域国家标准试点比较”的双边比较
文章描述了乌克兰和摩尔多瓦天然气体积和体积流量单位的国家测量标准的国际双边比较程序。这些比较是在COOMET项目684/MD/16“气流领域国家标准的试点比较”中进行的。列出了参与比较的参考标准清单。进行比较的气体体积流量范围为0.5 m3/h至50 m3/h。对于从0.5m3/h到1m3/h的流量范围,使用滚筒式流量计,并且对于从2m3/h到50m3/h的范围,使用旋转式气量计进行比较。据指出,乌克兰对天然气体积和体积流量单位的国家一级和二级标准进行了比较,而摩尔多瓦则将其作为天然气体积流量单元的国家标准。简要介绍了国家计量标准以及气体体积和体积流量单位的复制原理。特别指出的是,乌克兰的一级和二级标准是建立在钟形证明器的基础上的,摩尔多瓦的标准结合了活塞式和钟形证明器。介绍了乌克兰和摩尔多瓦国家标准的计算、扩展不确定度的计算和等效度的确定方法。双边比较结果如表1所示,如图4所示。国家标准的等效度不超过0.41,这表明一级和二级标准再现了具有声明不确定性的气体体积和体积流量单位,并且转移标准在整个比较周期中保持其计量特性。对双边比较的成功得出了一般性结论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ukrainian Metrological Journal
Ukrainian Metrological Journal INSTRUMENTS & INSTRUMENTATION-
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