Main text
In order to demonstrate the equivalence in calibration of 500 kg mass standard, a supplementary comparison has been carried out by 20 members of EURAMET. The overall result shows a good consistency among the participants.
To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.
The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
This paper presents improved methods for determining the volume magnetic susceptibility of cylindrical weights with knobs and for determining the magnetic dipole moment of cylindrical permanent magnets. A permanent magnet is an essential part of a susceptometer, which is used for determination of the magnetic properties of weights. An improvement in the accuracy of both methods is achieved by taking into account the actual shape of the objects under consideration. Because of their complexity, a numerical approach is necessary to solve the two physical models under consideration. The measurement uncertainty is evaluated using the Monte Carlo simulation. The results and uncertainty of the magnetic dipole moment of cylindrical permanent magnets are determined by taking into account the magnet's actual shape. They are also compared with the results of the method where the magnet is treated as a point dipole. The results of the susceptibility, together with the measurement uncertainty, are given for a set of weights, and compared with the results of the approximation method of inner and outer cylinders. The improved accuracy of the presented method can help in making correct decisions as to which weights are suitable for calibration.
This report summarizes the results of bilateral comparison of two 1 kg stainless steel mass standards between DFM, Denmark, and MIRS, Slovenia. The objectives were to facilitate the demonstration of metrological equivalence between the two participating national laboratories and to check the capabilities of MIRS to improve quoted calibration measurement capabilities (CMC) at 1 kg.Both laboratories have participated in EUROMET project 510 (key comparison EUROMET.M.M-K4). Results are consistent with each other and with the key comparison reference value of the comparison CCM.M-K1 to which this comparison has been linked through the comparison EUROMET.M.M-K4.Main text.
To reach the main text of this Paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).
Abstract. The article aims to present progress in the development of methods for calibration of automatic weighing instruments (AWIs), which operates in dynamic mode. The specificities of the calibration of the AWIs in the dynamic mode of operation are highlighted. For automatic catchweighing instruments and automatic gravimetric filling instruments, basic information about the measurement method, error model and measurement uncertainty contributions are given. Several approaches are presented for determining the reference mass of the test loads on the control weighing instrument, including the related analysis of the air buoyancy correction and influence of the density of the test loads. The use of harmonized and validated methods will, when finalised, enable a traceable calibration of the AWIs in a dynamic mode of operation.
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