CCPR-K4, EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1,
APMP.PR-K4, EURAMET.PR-K4.2 and EURAMET.PR-K4.3
MEASURAND: Luminous flux
Degrees of equivalence relative to the CCPR-K4 key comparison reference value, Di and Ui, expressed in relative terms
Red diamonds: participants in CCPR.PR-K4
Blue triangles: participants in EURAMET.PR-K4
Green circles: participants in SIM.PR-K4
Orange squares: participants in COOMET.PR-K4.1
Purple triangles: participants in APMP.PR-K4
Sky blue diamonds: participants in EURAMET.PR-K4.2
Brown diamond: participant in EURAMET.PR-K4.3
CCPR-K4, EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1,
APMP.PR-K4, EURAMET.PR-K4.2 and EURAMET.PR-K4.3
MEASURAND: Luminous flux
Degrees of equivalence relative to the CCPR-K4 key comparison reference value, Di and Ui, expressed in relative terms
Dark blue: participants in CCPR-K4
Blue: participants in EURAMET.PR-K4
Green: participants in SIM.PR-K4
Orange: participants in COOMET.PR-K4.1
Purple: participants in APMP.PR-K4
Sky blue: participants in EURAMET.PR-K4.2
Brown: participant in EURAMET.PR-K4.3
The cutoff uncertainty (0.30 %) was applied to the measurements of LNE-INM/Cnam, NMIA, NIM, NPL and PTB in the calculation of xR.
Measurements from INTI and the BIPM were excluded from the calculation of xR.
Acronyms of participants in CCPR-K4 (1997 - 1998) were updated in June 2015.
Results are presented under A4 printable format in Summary Results (PDF file).
| 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 |
National Metrology Laboratory, SIRIM Berhad (became NMIM), 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 and EURAMET.PR-K4.3
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%. |
| 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. |
| When required, the degree of equivalence between two laboratories is given by a pair of terms: Dij = (xi - xj) / xR and Uij, its expanded uncertainty (k = 2), both expressed in relative units. Uij = 2(ui2 + uj2)1/2. |
|
Beside the pilot laboratory, 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. |
| The realized or preserved luminous flux values of the EURAMET participants were compared with the EURAMET reference value in a star-type comparison at the pilot with batches of three to six lamps of various types. The degrees of equivalence with respect to the EURAMET reference value were evaluated and then directly transferred to the CCPR-K4 key comparison reference value. |
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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. |
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The degree of equivalence of the participant in SIM.PR-K4 with respect to the key comparison reference value is given by a pair of terms both dimensionless: |
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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. |
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The degree of equivalence of NSC "Institute of Metrology" participant in COOMET.PR-K4.1 with respect to the key comparison reference value is given by a pair of terms both dimensionless: |
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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. |
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The degree of equivalence of the participants in APMP.PR-K4 with respect to the key comparison reference value is given by a pair of terms both dimensionless: |
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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. |
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The degree of equivalence of RMC-LIPI, participant in EURAMET.PR-K4.2 with respect to the key comparison reference value is given by a pair of terms both dimensionless: |
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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. |
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The degree of equivalence of UME participant in EURAMET.PR-K4.3 with respect to the key comparison reference value is given by a pair of terms both dimensionless: |
CCPR-K4, EURAMET.PR-K4, SIM.PR-K4, COOMET.PR-K4.1,
APMP.PR-K4, EURAMET.PR-K4.2 and EURAMET.PR-K4.3
MEASURAND: Luminous flux
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.
The participants' measurements are given in Annex B of the EURAMET.PR-K4 Final Report.
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.
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.
The measurement results of the participants in APMP.PR-K4 are given in Section 6 of the APMP.PR-K4 Final Report.
The measurement results of the participants in EURAMET.PR-K4.2 are given in Section 4 of the EURAMET.PR-K4.2 Final Report.
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.
