共查询到19条相似文献,搜索用时 593 毫秒
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移液器作为活塞式计量器具,广泛应用于医疗卫生、化学、制药、生物等领域,随着保有量的快速增长,为验证各省对移液器的校准能力,进行了移液器装置的全国比对,中国计量科学研究院作为主导实验室。通过本次比对,验证了所有参比实验室所提交的100μL移液器的校准结果和不确定度有较好的一致性。 相似文献
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移液器作为活塞式计量器具,广泛应用于医疗卫生、化学、制药、生物和遗传学等领域,随着全球保有量的快速增长,为验证各国对移液器的校准能力,启动了第一次移液装置的国际关键比对,比对编号为BIPM/CIPMCCM.FF-K4.2.2011.葡萄牙质量协会(IPQ)下属的容量实验室作为主导实验室,中国计量科学研究院(NIM)和墨西哥国家计量中心(CENAM)作为副主导实验室参加了本次比对.通过本次关键比对验证了所有参加比对实验室所提交的100μL移液器的校准结果和不确定度有较好的一致性,本次比对时间从2011年7月至2012年7月. 相似文献
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依据JJG596-2012《电子式交流电能表》[1]和JJF 1117-2010《计量比对》[2]国家计量技术规范,由河南省计量院为主导实验室组织实施了"河南省单相电子式电能表量值比对"的计量比对工作。计量比对能够考察各实验室量值溯源的一致性,同时对实验室计量标准、环境条件、人员的技术能力进行考核和评判。[3]计量比对的测量结果与其不确定度的一致性采用En值进行评判,并对比对中存在问题进行了总结,对下一步开展检定工作具有很好的指导作用。 相似文献
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为验证现场烟道流量测量使用的对向测量S型皮托管、球形三维皮托管和棱形三维皮托管校准系数的一致性,中国计量科学研究院(NIM)主导开展了包括美国国家标准与技术研究院(NIST)和韩国标准科学研究院(KRISS)参加的皮托管校准比对。比对结果表明:S型皮托管在不同实验室间比对结果吻合度相对较差,不适合作为比对标准器;球形三维皮托管在不同实验室间比对结果吻合度高于棱形三维皮托管,流速校准系数差异对测量轴向流速的影响高于偏航角参考位置偏差与俯仰角校准系数差异造成的影响;皮托管的偏航角参考位置偏差和俯仰角校准系数差异造成的轴向流速差异在0.03%~0.9%,由于流速校准系数差异造成的轴向流速差异在1.9%~12.2%。 相似文献
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实验室间计量比对是质量控制管理中比较常见的方法,在质量控制管理中扮演着重要的角色,同时也是控制和衡量各实验室间校准能力的重要手段。计量比对工作由主导实验室负责实施,按照预先规定的条件,测量传递标准。通过分析测量结果的量值,确定各实验室测量结果与参考值的一致程度,分析各实验室的量值与参考值在合理的不确定度范围内的符合程度,从而判断该实验室的测量能力。本文以电子万能试验机力值计量比对为例,阐述了传递标准稳定性考核、传递标准参考值的确定、采用归一化偏差对参比实验室的测量结果进行一致性评判等过程。 相似文献
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根据浙江省质量技术监督局的安排,指定台州市计量技术研究院作为本次比对主导实验室,负责实施省内法定计量检定机构和社会第三方计量校准机构的计量比对工作。文章介绍了比对的技术方案、比对结果,指出电子天平校准工作中的不足,分析原因并提出建议和改进措施,有助于提高电子天平项目的检定校准技术能力,确保计量标准量值准确可靠。 相似文献
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Interlaboratory comparisons serve as tools for assessment of measurement results performed by calibration laboratories in the relevant field of measurement. They are effective means to demonstrate technical competence of the participant and are used as a technical base for accreditation. However, in the network of meteorological services calibration laboratories, comparisons among laboratories are still rare. Some laboratories are still not evaluating measurement uncertainty, thus causing problems when comparing meteorological data from different countries. The Environmental Agency of the Republic of Slovenia (EARS), serving in the frame of the World Meteorological Organization as a Regional Instrument Centre, has organized a round-robin comparison of calibration laboratories of meteorological services in the southeastern part of Europe using instruments for temperature, relative humidity, and barometric pressure. Each participant laboratory had to calibrate a set of instruments at defined calibration points, to evaluate the measurement uncertainty (if possible), and to report the results. EARS RIC invited the National Hydrometeorological Services in the southeastern part of Europe to take part in the intercomparison. In addition, the Laboratory of Metrology and Quality (MIRS/UL-FE/LMK), which holds the Slovenian national standard for temperature and relative humidity, was also invited to participate in the comparison and in the data analysis. Results from MIRS/UL-FE/LMK and EARS were used to calculate the temperature and humidity comparison reference values, while the EARS results were taken as reference values for barometric pressure. 相似文献
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Two dimensional standards are important materials which are used in the calibration and the verification of coordinate measuring machines. In several countries, the national metrology institutes or accredit laboratories provide the calibration services of the two dimensional standards such as ball plates, hole plates and grid plates. The metrological equivalence of the measurement standards among the calibration providers is validated through the key comparison program. In the previous key comparison for a ball plate and a hole plate, the equivalences among the participants’ calibration results were verified on the distances between the No. 1 ball/hole (i.e., the origins of the workpiece coordinates) and other balls/holes on the plates respectively. The essential measurands of the two dimensional standards are the coordinates of the feature points, however, the measurement equivalences on them have not been verified. In this study, the authors propose the coordinates-based evaluation of the reference values and their uncertainty in two dimensional standard calibration comparison. 相似文献
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J. B. Breitenbach 《真空研究与实践》2000,12(3):184-190
The increasing economic demand for higher measurement accuracy and the demands of modern quality assurance systems require regular calibration of the measuring and testing gauges. Vacuum gauges are more and more utilized as measuring and testing gauges in manufacturing processes and research in order to get reliable and correct product specifications. Systematic and statistical measuring deviations can only be determined through calibration. The reliability of test results is not only dependent on the accuracy, precision, repeatability and reproducibility but also depends on the competence of the tester and correctness of the testing method. Therefore, the confidence in the validity of the measurement results and in the competence of the calibration laboratory is a decisive factor. The calibration of vacuum gauges and the traceability to national standard is done through a series of comparison measurements. The calibration laboratories of the German calibration service (DKD), which are accredited by the Physikalische‐Technische Bundesanstalt (PTB), are distinguished by their technical expertise and high quality standard. The DKD‐calibration certificates offer reliable measurement results including the measuring uncertainty and are accepted by the accreditation bodies of the member states of the European co‐operation for Accreditation (EA). The typical requirements on a calibration laboratory for vacuum gauges are explained exemplarily for the DKD‐calibration laboratory of VACUUBRAND GMBH + CO KG company. 相似文献