APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM

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Revision: <strong>Final</strong> <strong>Report</strong> Date: May 25, 2012 Deviation from CRV (HRB) En Ratio 5.00 4.00 3.00 2.00 1.00 0.00 -1.00 -2.00 2.00 1.00 0.00 -1.00 -2.00 <strong>Comparison</strong> result on Rockwell hardness scale B 25 30 40 50 60 70 80 90 100 HRB D_NIMT D_PTB D_SCL D_KRISS D_NPLI Figure 4 Deviation value of HRB measurement comparison Degree of equivalence expressed in En ratio 25 30 40 50 60 70 80 90 100 HRB En ratio NIMT En ratio PTB En ratio SCL En ratio KRISS En ratio NPLI Figure 5 En Ratio of HRB measurement comparison Page 24 of 77
Revision: <strong>Final</strong> <strong>Report</strong> Date: May 25, 2012 To ensure that the SCL’ measurement results would not effect the other results, the evaluation on Rockwell scale B was done again without SCL’s measurement results. The comparison results, comparison reference value (CRV), the deviation value of each NMIs from CRV as well as their uncertainty and En ratio, are calculated and shown in Table 17, Figure 6 and Figure 7. Table 16 Conclusion of comparison evaluation on Rockwell hardness scale B without SCL’s results Nominal (HRBW) 25 30 40 50 60 70 80 90 100 CRV 23.89 28.92 37.82 51.05 59.63 69.83 79.61 90.27 99.94 U(CRV) 0.27 0.29 0.26 0.26 0.26 0.25 0.26 0.24 0.24 D_NIMT 0.24 -0.35 -0.05 -0.01 0.00 -0.18 0.01 0.22 0.15 U(D_NIMT) 0.48 0.58 0.48 0.48 0.48 0.47 0.48 0.47 0.47 En ratio NIMT 0.49 -0.61 -0.10 -0.02 0.01 -0.38 0.02 0.48 0.32 D_PTB -0.54 -0.33 -0.16 -0.11 0.33 0.05 0.01 -0.29 -0.27 U(D_PTB) 0.62 0.60 0.58 0.57 0.60 0.58 0.61 0.56 0.56 En ratio PTB -0.87 -0.55 -0.28 -0.19 0.54 0.09 0.02 -0.52 -0.48 D_KRISS -0.30 0.53 0.77 -0.05 0.16 0.34 0.25 0.10 0.16 U(D_KRISS) 0.80 0.80 0.79 0.79 0.65 0.65 0.65 0.65 0.65 En ratio KRISS -0.38 0.66 0.97 -0.07 0.25 0.52 0.38 0.15 0.24 D_NPLI 0.39 0.59 -0.17 0.20 -0.57 0.00 -0.25 -0.13 -0.08 U(D_NPLI) 0.75 0.67 0.65 0.65 0.65 0.58 0.62 0.56 0.56 En ratio NPLI 0.53 0.89 -0.26 0.31 -0.87 0.01 -0.40 -0.24 -0.14 Page 25 of 77
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