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

Revision: <strong>Final</strong> <strong>Report</strong>
Date: May 25, 2012
<strong>Report</strong> Form 4 Uncertainty budget of measurement Page 6/6
Uncertainty budget for 25 HRB
Quantity Estimated Standard Sensitivity Uncertainty
value
uncertainty coefficient contribution
X i x i
xi
uxi
3
C i u i (H )
Preliminary test force, F 0 0.05 N 0.0289 0.1780 0.0051
Total test force, F 0.5 N 0.2887 -0.1160 -0.0335
Permanent depth of measuring device, h 0.1 µm 0.0577 0.5000 0.0289
Preliminary test force dwell time, t 0 0.2 s 0.1155 -0.0617 -0.0071
Indentation velocity, v 10 µm/s 5.7735 0.0067 0.0387
Total test force dwell time, t 0.2 s 0.1155 -0.0170 -0.0020
Indenter diameter, d 0.1 µm 0.0577 0.0098 0.0006
Deformation of frame, DF 0.3 µm 0.1732 0.5000 0.0866
Combined uncertainty, u c
Expanded uncertainty, Ue
0.1050
k=2 0.21
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