Comparison
Comparison close

CCPR-K3.a, CCPR-K3.a.1, EURAMET.PR-K3.a, EURAMET.PR-K3.a.1 and COOMET.PR-K3.a

MEASURAND       Luminous intensity

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-2.

Luminous intensity
Di
Participating institutes
Comparison
Comparison close

CCPR-K3.a, CCPR-K3.a.1, EURAMET.PR-K3.a, EURAMET.PR-K3.a.1 and COOMET.PR-K3.a

MEASURAND       Luminous intensity

 

Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-2.

LABi Di Uneg,i Upos,i
10-2
10-2
10-2
LNE-INM/Cnam 0.89 0.60
NMISA 0.51 0.88
NMIA -0.07 0.60
NMIJ -0.09 0.56
INRIM -0.43 0.90
IO-CSIC -0.48 0.72
NIM -0.16 0.48
NIST 0.12 0.48
NPL 0.04 0.30
NRC 0.19 1.06
METAS -0.50 1.12
MKEH 0.05 0.94
PTB -0.31 0.40
SMU -0.36 1.40
VNIIOFI 0.33 0.92
INTI -0.25 0.74
BIPM 0.30 1.00
NMC, A*STAR 0.03 0.33
BIM 0.04 1.50
BelGIM -0.53 0.72
SP -0.61 0.93
UME 0.43 1.50
BEV -0.26 1.10
VSL -0.54 0.64
CMI -0.10 0.80
IPQ 0.57 1.60
DMDM 0.22 1.20
GUM 0.33 1.10
INM (RO) -0.21 1.40
SMU 0.42 0.72
MIKES -0.32 0.44
INM (RO) -0.72 0.90
BelGIM -0.57 0.94
NSC IM -0.66 1.28
KazInMetr -0.22 0.94
Participating institutes
CCPR-K3.a
CCPR-K3.a.1
EURAMET-K3.a
EURAMET-K3.a.1
COOMET-K3.a
EURAMET.PR-K3.a.1
Metrology area, Sub-field Photometry and Radiometry, Photometry
Description Luminous intensity (Bilateral comparison)
Time of measurements 2004 - 2005
Status Approved for equivalence
Final Reports of the comparisons
Measurand Luminous intensity
Transfer device High quality incandescent standard lamps
Comparison type Key Comparison
Consultative Committee CCPR (Consultative Committee for Photometry and Radiometry)
Conducted by EURAMET (European Association of National Metrology Institutes)
RMO Internal Identifier EUROMET Project No 823
Comments Results published on 17 May 2017.
Pilot institute LNE-LCM/Cnam
Conservatoire National des Arts et Métiers/Laboratoire Commun de Métrologie
France
Contact person Jean Bastie
noemail@wanadoo.fr
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
INM

National Institute of Metrology, Romania, EURAMET

LNE-INM

Conservatoire national des arts et métiers / Institut National de Métrologie, France, EURAMET

Comparison
Comparison close

CCPR-K3.a, CCPR-K3.a.1, EURAMET.PR-K3.a, EURAMET.PR-K3.a.1 and COOMET.PR-K3.a

MEASURAND       Luminous intensity

 

The individual measurements, xi, of the participating laboratories take the form of ratios which depend on the reference used at the pilot laboratory. This is cancelled out by normalization using the key comparison reference value, xR. This procedure leads to normalized individual measurements: xi / xR.

 

CCPR-K3.a

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 0.25%. The INTI and the BIPM are excluded from the calculation of xR. The standard uncertainty of xR is uR = 0.09 %. 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 CCPR-K3.a.1 to CCPR-K3.a

The link to the key comparison CCPR-K3.a is made though CSIRO-NML (now NMIA) that participated in both comparisons, see Section 9 of the CCPR-K3.a.1 Final Report.

 

Linking EURAMET.PR-K3.a to CCPR-K3.a

The link to the key comparison CCPR-K3.a is realized through the common participation of LNE-INM/Cnam, INRiM (named "BNM-INM" and "IEN" at the time of the CCPR key comparison) and PTB that participated in both comparisons, see EURAMET.PR-K3.a Final Report.

 

Linking EURAMET.PR-K3.a.1 to CCPR-K3.a

The link to the key comparison CCPR-K3.a is realized through the common participation of LNE see EURAMET.PR-K3.a.1 Final Report.

 

Linking COOMET.PR-K3.a to CCPR-K3.a

The link to the key comparison CCPR-K3.a is realized through the common participation of SMU and VNIIOFI, see COOMET.PR-K3.a Final Report.

Comparison
Comparison close

CCPR-K3.a, CCPR-K3.a.1, EURAMET.PR-K3.a, EURAMET.PR-K3.a.1 and COOMET.PR-K3.a

MEASURAND       Luminous intensity

 

For individual measurements see Final Reports.