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

Revision: <strong>Final</strong> <strong>Report</strong>
Date: May 25, 2012
Uncertainty budget for 60 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 0.101 0.058
Total test force, F 1.0 N 0.58 -0.0838 -0.048
Permanent depth of
indentation, h
3.0 um 1.73 -0.5 -0.866
Preliminary test force
0.5 s 0.29 0.1186 0.034
dwell time, t o
Indentation velocity, v 3.0 um/s 1.73 0.0018 0.003
Total test force dwell time, t 0.5 s 0.29 -0.017 -0.005
Indenter ball diameter, d 1.7 um 0.98 -0.0074 -0.007
Deformation of frame, DF 0.9 um 0.52 -0.5 -0.260
Combined uncertainty, u c k=2 0.908
Expanded uncertainty, Ue 1.8
Uncertainty budget for 70 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 0.079 0.046
Total test force, F 1.0 N 0.58 -0.0746 -0.043
Permanent depth of
indentation, h
3.0 um 1.73 -0.5 -0.866
Preliminary test force
0.5 s 0.29 0.1296 0.037
dwell time, t o
Indentation velocity, v 3.0 um/s 1.73 0.0004 0.001
Total test force dwell time, t 0.5 s 0.29 -0.017 -0.005
Indenter ball diameter, d 1.7 um 0.98 -0.0123 -0.012
Deformation of frame, DF 0.9 um 0.52 -0.5 -0.260
Combined uncertainty, u c k=2 0.907
Expanded uncertainty, Ue 1.8
x
3
x
3
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