Comparison
Comparison close

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

Enlarged graph

Graph

Comparison
Comparison close

CCPR-K3.a, EURAMET.PR-K3.a, EURAMET.PR-K3.a.1, COOMET.PR-K3.a and APMP.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 -0.21 1.40
SMU 0.42 0.72
MIKES -0.32 0.44
INM -0.72 0.90
BelGIM -0.57 0.94
NSC IM -0.66 1.28
KazStandard -0.22 0.94
CMS 1.93 0.86
SCL -0.48 1.30
SNSU-BSN -2.11 1.10
NPLI -0.61 0.88
NMIM -0.73 1.10
MSL -0.08 0.59
NIMT 0.61 0.87
NMC, A*STAR -0.09 0.71
VMI 0.28 1.00
NMISA -1.28 1.60
NIS -1.25 2.20
Participating institutes
CCPR-K3.a
CCPR-K3.a.1
EURAMET.PR-K3.a
EURAMET.PR-K3.a.1
COOMET.PR-K3.a
APMP.PR-K3.a
APMP.PR-K3.a
Metrology area, Sub-field Photometry and Radiometry, Photometry
Description Luminous intensity
Time of measurements 2012 - 2014
Status Approved for equivalence
Final Reports of the comparisons
References

APMP.PR-K3.a Technical Protocol

Measurand Luminous intensity in cd
Transfer device Lamps
Comparison type Key Comparison
Consultative Committee CCPR (Consultative Committee for Photometry and Radiometry)
Conducted by APMP (Asia Pacific Metrology Programme)
Pilot institute NMIJ AIST
National Metrology Institute of Japan
Japan
Contact person H. Shitomi

+81 29 861 5684
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

CMS

ITRI Center for Measurement Standards, Chinese Taipei, APMP

MSL

Measurement Standards Laboratory, New Zealand, APMP

NIM

National Institute of Metrology, China, APMP

NIMT

National Institute of Metrology (Thailand), Thailand, APMP

NIS

National Institute for Standards, Egypt, AFRIMETS

NMC, A*STAR

National Metrology Centre, Agency for Science, Technology and Research, Singapore, APMP

NMIM

National Metrology Institute of Malaysia, Malaysia, APMP

NMISA

National Metrology Institute of South Africa, South Africa, AFRIMETS

NPLI

CSIR National Physical Laboratory of India, India, APMP

SCL

Standards and Calibration Laboratory, Hong Kong, China, APMP

SNSU-BSN

National Measurement Standard - National Standardization Agency of Indonesia, Indonesia, APMP

VMI-STAMEQ

Viet Nam Metrology Institute, Directorate for Standards and Quality, Viet Nam, APMP

Comparison
Comparison close

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

 

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

The link to the key comparison CCPR-K3.a is realised through the common participation of NMIJ and NIM, see Section 7 of the APMP.PR-K3.a Final Report.

 

Comparison
Comparison close

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

MEASURAND       Luminous intensity

 

For individual measurements see the Final Reports.