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

Revision: <strong>Final</strong> <strong>Report</strong>
Date: May 25, 2012
Uncertainty budget for 40 HRB 55
Quantity Estimated Standard Sensitivity Uncertainty
value uncertainty coefficient contribution
i
X i Dx u x i
i
C i u i (H )
Preliminary test force, Fo 1.0 N 0.58 0.145 0.084
Total test force, F 1.0 N 0.58 -0.1022 -0.059
Permanent depth of
indentation, h
3.0 um 1.73 -0.5 -0.866
Preliminary test force
0.5 s 0.29 0.0426 0.012
dwell time, t o
Indentation velocity, v 3.0 um/s 1.73 0.0046 0.008
Total test force dwell time, t 0.5 s 0.29 -0.017 -0.005
Indenter ball diameter, d 1.7 um 0.98 0.0024 0.002
Deformation of frame, DF 0.9 um 0.52 -0.5 -0.260
Combined uncertainty, u c k=2 0.910
Expanded uncertainty, Ue 1.8
Uncertainty budget for 50 HRB 55
Quantity Estimated Standard Sensitivity Uncertainty
value uncertainty coefficient contribution
i
X i Dx u x i
i
C i u i (H )
Preliminary test force, Fo 1.0 N 0.58 0.123 0.071
Total test force, F 1.0 N 0.58 -0.0930 -0.054
Permanent depth of
indentation, h
3.0 um 1.73 -0.5 -0.866
Preliminary test force
0.5 s 0.29 0.0896 0.026
dwell time, t o
Indentation velocity, v 3.0 um/s 1.73 0.0032 0.006
Total test force dwell time, t 0.5 s 0.29 -0.017 -0.005
Indenter ball diameter, d 1.7 um 0.98 -0.0025 -0.002
Deformation of frame, DF 0.9 um 0.52 -0.5 -0.260
Combined uncertainty, u c k=2 0.909
Expanded uncertainty, Ue 1.8
x
3
x
3
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