APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM
APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM
APMP.M.H-S3 Final Report Comparison on Hardness ... - BIPM
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Revisi<strong>on</strong>: <str<strong>on</strong>g>Final</str<strong>on</strong>g> <str<strong>on</strong>g>Report</str<strong>on</strong>g><br />
Date: May 25, 2012<br />
Uncertainty budget for<br />
85 HRA<br />
No Quantity<br />
Estimated<br />
valus<br />
Unit<br />
Stadard<br />
uncertatinty<br />
Sensitivity<br />
coefficient<br />
Uncertainty<br />
c<strong>on</strong>tributi<strong>on</strong><br />
X i x i<br />
xi<br />
ux<br />
<br />
C i u i (H )<br />
1 Preliminary test force 0.09 N 0.05 0.0412 0.0022<br />
2 Total test force 0.16 N 0.09 -0.02315 -0.0021<br />
3 Permanent depth of indentati<strong>on</strong> 0.2 ㎛ 0.12 -0.5 -0.0577<br />
4 Preliminary test force dwell time 0.5 s 0.29 -0.0061 -0.0018<br />
5 Indentati<strong>on</strong> velocity 6 ㎛/s 3.46 0.00735 0.0255<br />
6 Total test force dwell time 0.5 s 0.29 -0.026 -0.0075<br />
7 indenter angle 0.04 ° 0.02 0.18 0.0042<br />
8 Indenter radius 3.1 ㎛ 1.79 0.058 0.1038<br />
9 Deformati<strong>on</strong> of frame 0.2 ㎛ 0.12 0.5 0.0577<br />
10<br />
L<strong>on</strong>g-term stability of primary<br />
hardness testing machine<br />
0.20 HRA 0.12 1<br />
0.1155<br />
11 Combined uncertainty(HRA) 0.178<br />
12 Expanded uncertainty(HRA), k=2 0.36<br />
i<br />
3<br />
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