CCPR-K4, EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1, APMP.PR-K4,
EURAMET.PR-K4.2, EURAMET.PR-K4.3, GULFMET.PR-K4.2021.1 and GULFMET.PR-K4.2021.2
MEASURAND: Luminous flux
Degrees of equivalence relative to the CCPR-K4 key comparison value, Di and its expanded uncertainty Ui at a 95 % expressed in relative terms.
CCPR-K4, EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1, APMP.PR-K4,
EURAMET.PR-K4.2, EURAMET.PR-K4.3, GULFMET.PR-K4.2021.1 and GULFMET.PR-K4.2021.2
MEASURAND: Luminous flux
Degrees of equivalence relative to the CCPR-K4 key comparison value, Di and its expanded uncertainty Ui at a 95 % expressed in relative terms.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
10-2 |
10-2 |
10-2 |
||
| LNE-INM/Cnam | 0.69 | 0.58 | ||
| NMISA | -0.01 | 1.06 | ||
| NMIA | 0.13 | 0.58 | ||
| NMIJ | 0.18 | 0.68 | ||
| INRIM | -0.06 | 0.96 | ||
| IO-CSIC | -0.43 | 1.70 | ||
| NIM | -0.22 | 0.52 | ||
| NIST | -0.21 | 0.62 | ||
| NPL | 0.37 | 0.40 | ||
| NRC | 0.99 | 2.00 | ||
| METAS | -0.57 | 1.38 | ||
| MKEH | 0.43 | 1.30 | ||
| PTB | -0.42 | 0.56 | ||
| SMU | -0.88 | 2.20 | ||
| VNIIOFI | -0.51 | 0.66 | ||
| INTI | -0.43 | 1.00 | ||
| BIPM | 0.32 | 1.02 | ||
| MIKES | 0.03 | 0.76 | ||
| CMI | 0.35 | 1.00 | ||
| DMDM | 0.43 | 1.20 | ||
| INM(RO) | -0.71 | 1.30 | ||
| VSL | 1.20 | 1.10 | ||
| GUM | -0.73 | 1.00 | ||
| BIM | -1.00 | 2.60 | ||
| BEV | -0.80 | 1.40 | ||
| SP | 0.02 | 1.40 | ||
| CENAM | -0.41 | 1.09 | ||
| INMETRO | 0.48 | 2.08 | ||
| INTI | -0.45 | 1.01 | ||
| NSC "Institute of Metrology" | -0.94 | 1.05 | ||
| CMS | 0.29 | 1.63 | ||
| KRISS | -1.00 | 1.32 | ||
| NIMT | 0.41 | 1.22 | ||
| NML-SIRIM | 0.40 | 1.63 | ||
| NPLI | 0.51 | 1.37 | ||
| NMC-A*STAR | -0.49 | 1.11 | ||
| RMC-LIPI | 0.07 | 1.30 | ||
| UME | -0.25 | 1.60 | ||
| SASO-NMCC | 1.36 | 2.20 | ||
| NIS | 1.43 | 1.60 |
| Metrology area, Sub-field | Photometry and Radiometry, Photometry |
| Description | Luminous flux |
| Time of measurements | 2006 - 2007 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Luminous flux |
| Transfer device | Lamps |
| Comparison type | Key Comparison |
| Consultative Committee | CCPR (Consultative Committee for Photometry and Radiometry) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Comments | Results published on 5 January 2018 Luminous flux of lamps EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1, APMP.PR-K4, EURAMET.PR-K4.2 and EURAMET.PR-K4.3 results are linked to those of CCPR-K4
|
| Pilot institute |
NIM
National Institute of Metrology China |
| Contact person | Liu Hui +86 10 642 11 631 2707 |
| Additional |
| Pilot laboratory | |
|---|---|
| NIM |
National Institute of Metrology, China, APMP |
| CMS/ITRI |
Industrial Technology Research Institute/Center for Measurement Standards, Chinese Taipei, APMP |
| CSIR-NML |
Council for Scientific and Industrial Research, National Metrology Laboratory (became NMISA in 2007), South Africa, AFRIMETS |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NML-SIRIM (became NMIM) |
National Metrology Laboratory, SIRIM Berhad (became National Metrology Institute of Malaysia), Malaysia, APMP |
| NPLI |
CSIR National Physical Laboratory of India, India, APMP |
| SPRING Singapore |
Singapore Standards, Productivity and Innovation Board (became NMC, A*STAR in 2008), Singapore, 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" :
CCPR-K4, EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1, APMP.PR-K4,
EURAMET.PR-K4.2, EURAMET.PR-K4.3, GULFMET.PR-K4.2021.1 and GULFMET.PR-K4.2021.2
MEASURAND: Luminous flux
The key comparison reference value, xR, is calculated as the weighted average of the invidual results xi, weighted by the inverse square of the individual standard uncertainties, ui, with the application of a minimum cutoff of 0.30% to the measurements of LNE-INM/Cnam, NMIA, NIM, NPL and PTB.
INTI and the BIPM are excluded from the calculation of xR.
The standard uncertainty of xR is uR = 0.1%. It is negligible compared to the ui values.
The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = (xi - xR) / xR and Ui, its expanded uncertainty (k = 2), both expressed in relative units. Ui = 2ui.
Linking EURAMET.PR-K4 to CCPR-K4
PTB, INRIM and LNE-INM/Cnam acted as linking laboratories for EURAMET.PR-K4. The luminous flux maintained at the linking laboratories was used to evaluate the EURAMET reference value as a weighted luminous flux average.
By definition, the CCPR-K4 key comparison reference value and the EURAMET.PR-K4 reference value have identical values (see Section 4.2 of the EURAMET.PR-K4 Final Report, especially Table 4 and Figure 4), but the expanded uncertainty associated with the EURAMET reference value is about triply the expanded uncertainty associated with the CCPR-K4 key comparison reference value.
Linking SIM.PR-K4 to CCPR-K4
NRC and NIST provide the link between key comparisons CCPR-K4 and SIM.PR-K4 and, the linkage process is described in Section 9.2 of the SIM.PR-K4 Final Report.
Linking COOMET.PR-K4.1 to CCPR-K4
VNIIOFI provides the link between key comparisons CCPR-K4 and COOMET.PR-K4.1, and the linkage process is described in Section 5 of the COOMET.PR-K4.1 Final Report.
Linking APMP.PR-K4 to CCPR-K4
NIM, NMISA and NMIJ-AIST provide the link between key comparisons CCPR-K4 and APMP.PR-K4, and the linkage process is described in Section 8 of the APMP.PR-K4 Final Report.
Linking EURAMET.PR-K4.2 to CCPR-K4
LNE/INM-Cnam provides the link between key comparisons CCPR-K4 and EURAMET.PR-K4.2, and the linkage process is described in Section 4 of the EURAMET.PR-K4.2 Final Report.
Linking EURAMET.PR-K4.3 to CCPR-K4
IO-CSIC provides the link between key comparisons CCPR-K4 and EURAMET.PR-K4.3, and the linkage process is described in Section 5 of the EURAMET.PR-K4.3 Final Report.
Linking GULFMET.PR-K4.2021.1 to CCPR-K4
UME provides the link between key comparisons CCPR-K4 and GULFMET.PR-K4.2021.1, through its participation in EURAMET.PR-K4.3. The linking process is described in Section 5.2 of the GULFMET.PR-K4.2021.1 Final Report.
Linking GULFMET.PR-K4.2021.2 to CCPR-K4
UME provides the link between key comparisons CCPR-K4 and GULFMET.PR-K4.2021.1, through its participation in EURAMET.PR-K4.3. The linking process is described in Section 5.2 of the GULFMET.PR-K4.2021.2 Final Report.
CCPR-K4, EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1, APMP.PR-K4,
EURAMET.PR-K4.2, EURAMET.PR-K4.3, GULFMET.PR-K4.2021.1 and GULFMET.PR-K4.2021.2
MEASURAND: Luminous flux
CCPR-K4
The individual measurements, xi, of the participating laboratories take the form of ratios which depend on the reference used at the pilot laboratory, the PTB. This is cancelled out by normalization using the key comparison reference value, xR. This procedure leads to normalized individual measurements: xi / xR.
EURAMET.PR-K4
The participants' measurements are given in Annex B of the EURAMET.PR-K4 Final Report.
SIM.PR-K4
The ratio of the measurement results of the laboratories participating in SIM.PR-K4 to the measurement results obtained at the pilot laboratory, the CENAM, are given in table 15 of the SIM.PR-K4 Final Report.
COOMET.PR-K4.1
The measurement results of the laboratories participating in COOMET.PR-K4.1 are given in table 7 of the COOMET.PR-K4.1 Final Report.
APMP.PR-K4
The measurement results of the participants in APMP.PR-K4 are given in Section 6 of the APMP.PR-K4 Final Report.
EURAMET.PR-K4.2
The measurement results of the participants in EURAMET.PR-K4.2 are given in Section 4 of the EURAMET.PR-K4.2 Final Report.
EURAMET.PR-K4.3
The measurement results of the participants in EURAMET.PR-K4.3 are given in Section 3 and 4 of the EURAMET.PR-K4.3 Final Report.
GULFMET.PR-K4.2021.1
The measurement results of the participants in GULFMET.PR-K4.2021.1 are given in Section 5.1 of the GULFMET.PR-K4.2021.1 Final Report.
GULFMET.PR-K4.2021.2
The measurement results of the participants in GULFMET.PR-K4.2021.1 are given in Section 5.1 of the GULFMET.PR-K4.2021.2 Final Report.
