(6) Where is the standard uncertainty determined by laboratory i and presented in results of laboratory I, uTS is estimated standard uncertainty caused by the stability (reproducibility) and temperature sensitivity of the transfer standard. The transfer standard was tested 7 times in the pilot laboratory (based on the time schedule) and the transfer standard calibration stability was determined based on these results. A maximum error of 0.103 % was found during the experiments eexp (see Figure 3). Combining the uncertainties due to transfer standard calibration stability and temperature sensitivity by root-sum-of-squares leads to a transfer standard uncertainty of 0.031 %. = 0.031 % (7) This transfer standard uncertainty component was combined by root-sum-of-squares with the standard uncertainty provided by each participating laboratory (Equation 6) and the results are stated in annex B. The ratio of the transfer standard uncertainty to any participant´s flow standard uncertainty is ≤ 1.0. Evaluation Linking to the CCM.FF-K6.2011 Key comparison CCM.FF-K6.2011 was performed simultaneously with EURAMET.M-FF-K6 with the same transfer standard. The linking procedure and its uncertainty analysis are based on the principles which are given in the papers of Elster et al, [4], Kharitonov et al, [5] and Decker et al, [6]. The EURAMET.M.FF-K6 is linked to the CCM.FF-K6.2011 [10] by correcting results of three linking laboratories (Slovakia SMU, Germany PTB and France LNE LADG) with the following procedure. These results are plotted in Figure 8 with the KCRV. The results from EURAMET.M-FF-K6 are corrected by the procedure described by Delahaye and Witt [8]. The calculation was determined for each flow separately. A correction, which should be applied to the result from KCRV, was obtained by equation (8) (8) where Dl is the difference between the results from CCM.FF-K6.2011 and EURAMET.M-FF-K6 at a same linking laboratory (SMU, PTB, LNE-LADG) as presented by equation (9) and wl is the weighting coefficient obtained from the uncertainty at each linking laboratory as presented by equation (10). )
(6) Where is the standard uncertainty determined by laboratory i and presented in results of laboratory I, uTS is estimated standard uncertainty caused by the stability (reproducibility) and temperature sensitivity of the transfer standard. The transfer standard was tested 7 times in the pilot laboratory (based on the time schedule) and the transfer standard calibration stability was determined based on these results. A maximum error of 0.103 % was found during the experiments eexp (see Figure 3). Combining the uncertainties due to transfer standard calibration stability and temperature sensitivity by root-sum-of-squares leads to a transfer standard uncertainty of 0.031 %. = 0.031 % (7) This transfer standard uncertainty component was combined by root-sum-of-squares with the standard uncertainty provided by each participating laboratory (Equation 6) and the results are stated in annex B. The ratio of the transfer standard uncertainty to any participant´s flow standard uncertainty is ≤ 1.0. Evaluation Linking to the CCM.FF-K6.2011 Key comparison CCM.FF-K6.2011 was performed simultaneously with EURAMET.M-FF-K6 with the same transfer standard. The linking procedure and its uncertainty analysis are based on the principles which are given in the papers of Elster et al, [4], Kharitonov et al, [5] and Decker et al, [6]. The EURAMET.M.FF-K6 is linked to the CCM.FF-K6.2011 [10] by correcting results of three linking laboratories (Slovakia SMU, Germany PTB and France LNE LADG) with the following procedure. These results are plotted in Figure 8 with the KCRV. The results from EURAMET.M-FF-K6 are corrected by the procedure described by Delahaye and Witt [8]. The calculation was determined for each flow separately. A correction, which should be applied to the result from KCRV, was obtained by equation (8) (8) where Dl is the difference between the results from CCM.FF-K6.2011 and EURAMET.M-FF-K6 at a same linking laboratory (SMU, PTB, LNE-LADG) as presented by equation (9) and wl is the weighting coefficient obtained from the uncertainty at each linking laboratory as presented by equation (10). )
EURAMET-P1180_FLOW_Final_Report.docx