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

Revision: <strong>Final</strong> <strong>Report</strong>
Date: May 25, 2012
Uncertainty budget for 80 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 0.057 0.033
Total test force, F 1.0 N 0.58 -0.0654 -0.038
Permanent depth of
indentation, h
3.0 um 1.73 -0.5 -0.866
Preliminary test force
0.5 s 0.29 0.1226 0.035
dwell time, t o
Indentation velocity, v 3.0 um/s 1.73 -0.0010 -0.002
Total test force dwell time, t 0.5 s 0.29 -0.017 -0.005
Indenter ball diameter, d 1.7 um 0.98 -0.0172 -0.017
Deformation of frame, DF 0.9 um 0.52 -0.5 -0.260
Combined uncertainty, u c k=2 0.906
Expanded uncertainty, Ue 1.8
Uncertainty budget for 90 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 0.035 0.020
Total test force, F 1.0 N 0.58 -0.0562 -0.032
Permanent depth of
indentation, h
3.0 um 1.73 -0.5 -0.866
Preliminary test force
0.5 s 0.29 0.0976 0.028
dwell time, t o
Indentation velocity, v 3.0 um/s 1.73 -0.0024 -0.004
Total test force dwell time, t 0.5 s 0.29 -0.017 -0.005
Indenter ball diameter, d 1.7 um 0.98 -0.0221 -0.022
Deformation of frame, DF 0.9 um 0.52 -0.5 -0.260
Combined uncertainty, u c k=2 0.906
Expanded uncertainty, Ue 1.8
x
3
x
3
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