Consultative Committee for Mass and Related Quantities (CCM): REPORT FROM THE CCM WORKING GROUP CHAIRS MEETING (Dr Chris Sutton, MSL)

摘要

Dr Sutton outlined the composition of the Working Group and said that it met twice every 3 years, at the same time as, and between CCM meetings. He noted that this group is also the Working Group on Key Comparisons for the CCM. Brief reports were given by the chairs of the technical Working Groups, focussing on the status of key comparisons, including any planned or completed comparisons needing CCM approval. Two such new comparisons were identified; CCM.M-K7 (a mass sub-multiples comparison with mass set 3), and CCM.FF-K6.b (low pressure gas flow). The method for the review of CCM and RMO key comparisons was discussed. Dr Sutton reported that the traceability status of BIPM mass calibrations had been made clearer, following the addition of a link to BIPM's mass calibration services in the KCDB under the heading "Traceability to the SI through the BIPM". Dr Sutton demonstrated this link (http://www.bipm.org/en/bipm/calibrations/cms_m.html).