Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in μm are available in graphical form on pages 10 to 27 (figures 4 to 39) of the APMP.L-K5.n01 Final report.
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in μm are available in graphical form on pages 10 to 27 (figures 4 to 39) of the APMP.L-K5.n01 Final report.
| Metrology area, Sub-field | Length, Dimensional Metrology |
| Description | Calibration of a step gauge |
| Time of measurements | 2021 - 2022 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Distances of the centres of the front and back faces of the individual gauges of the step-gauge with respect to the centre of the front face of the first gauge. |
| Transfer device | Step gauge |
| Comparison type | Key Comparison |
| Consultative Committee | CCL (Consultative Committee for Length ) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Pilot institute |
NIM
National Institute of Metrology China |
| Contact person | Hengzheng Wei +86 10 64524931 |
| Pilot laboratory | |
|---|---|
| NIM |
National Institute of Metrology, China, APMP |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| MSL |
Measurement Standards Laboratory, New Zealand, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
The key comparison reference value xR and its associated standard uncertainty uR for each measurand interval is computed from the weighted mean of the largest consistent subset of participants reported results, as explained in Section 6.1 of the APMP.L-K5.n01 Final report.
The values and standard uncertainties of the key comparison reference values are given in Table 7 of Section 6.5 (page 9 ) of the APMP.L-K5.n01 Final report.
The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in μm:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 (ui2 - uR2)1/2 for participants whose measurements contributed to the calculation of xR and Ui = 2 (ui2 + uR2)1/2 for participants whose measurements did not contribute to the calculation of xR.
The measurement results of each participant are shown in Table 4 in Section 6.3 (page 6) of the APMP.L-K5.n01 Final report.
