CCPR-K3.2014
MEASURAND Luminous intensity
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in (cd/V)/(cd/V).
CCPR-K3.2014
MEASURAND Luminous intensity
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in (cd/V)/(cd/V).
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
(cd/V)/(cd/V) |
(cd/V)/(cd/V) |
(cd/V)/(cd/V) |
||
| NMIJ | 0.0047 | 0.0051 | ||
| NIM | 0.0002 | 0.0032 | ||
| PTB | -0.0004 | 0.0030 | ||
| METAS | -0.0006 | 0.0061 | ||
| NIST | 0.0006 | 0.0043 | ||
| NMIA | -0.0018 | 0.0029 | ||
| VNIIOFI | -0.0073 | 0.0048 | ||
| IO-CSIC | -0.0011 | 0.0061 | ||
| NPL | 0.0034 | 0.0032 | ||
| NMISA | -0.0093 | 0.0132 | ||
| NRC | 0.0051 | 0.0123 |
| Metrology area, Sub-field | Photometry and Radiometry, Photometry |
| Description | Luminous intensity |
| Time of measurements | 2014 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Luminous intensity of an incandescent lamp in a specified direction from a defined point on a reference plane defined by the plane of the lamp filament |
| Parameters | Lamp geometric alignment parameters Lamp DC electrical current and voltage Correlated colour temperature |
| Transfer device | Transfer standard incandescent lamps |
| Comparison type | Key Comparison |
| Consultative Committee | CCPR (Consultative Committee for Photometry and Radiometry) |
| Conducted by | CCPR (Consultative Committee for Photometry and Radiometry) |
| Comments | Results published on 16 June 2022. |
| Pilot institute |
NRC
National Research Council Canada |
| Contact person | Arnold A. Gaertner +1 613 993 9344 |
| Pilot laboratory | |
|---|---|
| NRC |
National Research Council, Canada, SIM |
| IO-CSIC |
Instituto de Optica Daza de Valdés, Spain, EURAMET |
| LNE-LCM/Cnam |
Conservatoire National des Arts et Métiers/Laboratoire Commun de Métrologie, France, EURAMET |
| METAS |
Federal Institute of Metrology, Switzerland, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| VNIIOFI |
All-Russian Scientific Institute for Optical and Physical Measurements, Rosstandart, Russian Federation, COOMET |
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CCPR-K3.2014
MEASURAND Luminous intensity
The key comparison reference value xR and its associated standard uncertainty uR were calculated by applying a Mandel-Paule method to the participant results, those of the NMISA and LNE/LCE-Cnam excluded:
xR = 86.256 cd/V uR = 0.059 cd/V
The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 ui, both expressed in (cd/V)/(cd/V).
CCPR-K3.2014
MEASURAND Luminous intensity
The measurement data are listed in Appendix D of the CCPR-K3.2014 Final Report.
