Evaluation of automatic sub-multiple mass calibration for sub-milligram weights at NMIJ

Evaluation of automatic sub-multiple mass calibration for sub-milligram weights at NMIJ
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NMIJ 亚毫克重量自动亚多重质量校准的评估

DOI:
10.1016/j.measurement.2022.111320
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发表时间:
2022
期刊:
影响因子:
5.6
通讯作者:
Kuramoto N.
Kuramoto N.
中科院分区:
工程技术2区
文献类型:
--
作者:
Ota Y.;Ueki M.;Kuramoto N.

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质量标准对于质量的精确测量至关重要。由于对小质量测量的需求不断增加,因此必须能够传播来自国家计量研究所的亚毫克质量标准。最近,日本国家计量研究所开发了一种通过自动传送砝码来进行亚毫克砝码质量校准的装置。因此,可以准确可靠地校准砝码的质量。约数校准通常用于小于1 kg重量的精确质量校准。在本研究中,将此方法与所开发的装置相结合,改善了亚毫克砝码的质量校准不确定度。进行0.1 mg、0.2 mg和0.5 mg重量的质量校准,标准不确定度分别为0.019 µg、0.023 µg和0.040 µg。这些不确定度小于手动运输亚毫克重量的超微量天平获得的校准不确定度。
Mass standards are essential for the precise measurement of mass. Due to the increasing demand for small mass measurements, it is essential to be able to disseminate the sub-milligram mass standard from the National Metrology Institutes. Recently, the National Metrology Institute of Japan has developed an apparatus for mass calibration of sub-milligram weights by automatically transporting the weights. Consequently, the masses of the weights can be calibrated accurately and reliably. Sub-multiple calibration is often used for accurate mass calibration of weights smaller than 1 kg. In this study, by combining this method with the developed apparatus, the mass calibration uncertainty of sub-milligram weights was improved. The mass calibrations of 0.1 mg, 0.2 mg, and 0.5 mg weights were performed with standard uncertainties of 0.019 µg, 0.023 µg, and 0.040 µg, respectively. These uncertainties were smaller than the calibration uncertainties obtained by manually transporting sub-milligram weights to an ultra-micro balance.
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