Abstract
In the present comparison, the degrees of equivalence of the measurement standards for vacuum pressures from 3E-4 Pa up to 1 Pa of three NMIs were evaluated by comparison with the measurement standards PTB serving as linking laboratory to the two key comparisons CCM.P-K15 and CCM.P-K4. The three NMIs were IMT, Slovenia, NIMT, Thailand and TUBITAK-UME, Turkey. Two spinning rotor gauges served as transfer standards and showed a very good stability. All NMIs and at all pressures showed equivalence with the key comparison reference values of CCM.P-K15 and CCM.P-K4. Another NMI, CEM, Spain, took part in the comparison, but did not deliver any data.Main textTo 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 (CIPM MRA).
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