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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 />

Page 57 of 77

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