CCM.F-K4 and APMP.M.F-K4.b
MEASURAND : Force
NOMINAL VALUE : 2 MN
Degrees of equivalence Di and expanded uncertainty Ui (k = 2) expressed in 10-6
PTB (1) : 16.5 MN-K-NME machine
PTB (2) : 2 MN-K-NME machine
Red diamonds : participants in CCM.F-K4
Green triangles : participants in APMP.M.F-K4.b
CCM.F-K4 and APMP.M.F-K4.b
MEASURAND : Force
NOMINAL VALUE : 2 MN
| Lab i | Di | Ui |
| / (10-6) | / (10-6) | |
| NIST | 1 | 20 |
| LNE | 32 | 500 |
| NMIJ | -104 | 92 |
| KRISS | -28 | 202 |
| PTB (1) | -34 | 74 |
| NIM | 25 | 72 |
| NPL | 271 | 202 |
| GUM | -590 | 500 |
| PTB (2) | 4 | 30 |
| KRISS* | 20 | 150 |
| NMIA* | 80 | 430 |
| SCL* | 370 | 560 |
| CMS* | 160 | 520 |
| NMC, A*STAR* | 50 | 190 |
| NIST* | 40 | 100 |
| NMIJ* | -60 | 120 |
* participants in APMP.M.F-K4.b Results are presented under A4 printable format in Summary Results (PDF file). Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO-31-0 Annex B Rule B.
PTB (1) : 16.5 MN-K-NME machine
PTB (2) : 2 MN-K-NME machine
| Metrology area, Sub-field | Mass and related quantities, Force |
| Description | Very high force measurements |
| Time of measurements | 2005 - 2006 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Force: 0 MN and 2 MN |
| Transfer device | Force transducers |
| Comparison type | Key Comparison |
| Consultative Committee | CCM (Consultative Committee for Mass and Related Quantities) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Comments | Results published on 10 May 2012 APMP.M.F-K4.b results are linked to those of CCM.F-K4.a and CCM.F-K4.b Force measurements |
| Pilot institute |
NMIJ AIST
National Metrology Institute of Japan Japan |
| Contact person | K. Ueda |
| Pilot laboratory | |
|---|---|
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| CMS |
ITRI Center for Measurement Standards, Chinese Taipei, APMP |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMC, A*STAR |
National Metrology Centre, Agency for Science, Technology and Research, Singapore, APMP |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| SCL |
Standards and Calibration Laboratory, Hong Kong, China, APMP |
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" :
CCM.F-K4 and APMP.M.F-K4.b
MEASURAND : Force
NOMINAL VALUE : 2 MN
|
Two analysis approaches for calculating key comparison reference values have been used, one employing a classical consensus mean analysis (see on page 19 of the Final Report) and the other based on weighted mean calculations (see on page 31 of the same Report). Reasonable correlation in the conclusions for individual transducers is seen between the two approaches. |
| The degree of equivalence of each laboratory i with respect to the key comparison reference reference value is given by a pair of terms, both expressed in 10-6: Di and Ui, its expanded uncertainty (k = 2). |
| The degree of equivalence between two laboratories i and j is given by a pair of terms, both expressed in 10-6: Dij and Uij, its expanded uncertainty (k = 2). |
The link is made using NMIJ, NIST and KRISS results in both comparisons (see Section 3.6 of the APMP.M.F-K4.b Final Report).
| The degree of equivalence of each laboratory i with respect to the key comparison reference reference value is given by a pair of terms, both expressed in 10-6: Di and Ui, its expanded uncertainty (k = 2). Table 5 of the APMP.M.F-K4.b Final Report gives the relative values of the degrees of equivalence expressed in 10-4. |
| The pair-wise degrees of equivalence between participants in APMP.M.F-K4.b are given in Table 7 of the APMP.M.F-K4.b. |
CCM.F-K4 and APMP.M.F-K4.b
MEASURAND : Force
NOMINAL VALUE : 2 MN
Dates of measurements : 2004 - 2005
Measurements in key comparisons CCM.F-K4.a and CCM.F-K4.b were carried out according to the protocol explained starting page 3 of the Final Report.
Transducers 1 and 2, of 5 MN capacity and 4 MN capacity, respectively, were used for measurements in CCM.F-K4.a, and Transducers 3 and 4, of 2 MN capacity and 2.22 MN capacity, respectively, for measurements in CCM.F-K4.b.
Detailed results of measurements obtained with the four transducers are reported in Tables 2, 3 and 4 of the Final Report.
Note that PTB is involved twice: as PTB(1) corresponding to their 16.5 MN-K-NME machine and PTB (2) corresponding to their 2 MN-K-NME machine.
The measurements are then analysed and concatenated in order to provide one set of measurements for 2 MN forces involving all participants, and one set of measurements for 4 MN forces involving all participants but GUM and PTB (2).
MEASURAND : Force
NOMINAL VALUE : 2 MN
Dates of measurements : 2005 - 2007
Measurements in key comparison APMP.M.F-K4.b were carried out according to the scheme explained in Section 2 of the Final Report.
Transducers 1 and 2 of 2 MN capacity were used for the measurements in APMP.M.F-K4.b.
Detailed results of measurements obtained with the two transducers are reported in Table 2 of the Final Report.
The measurements are then analysed and concatenated in order to provide one set of measurements for 2 MN force for each of the participants. This set of results is given in Table 3 of the Final Report, and is expressed as the relative overall deviation of the participants' results from the pilot laboratory NMIJ, as explained in Section 3.5 of the Final Report.
