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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 250 nm to 360 nm

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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 370 nm to 750 nm

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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 800 nm to 1700 nm

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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 1800 nm to 2500 nm

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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Degrees of Equivalence for spectral irradiance

in the interval from 250 nm to 360 nm

A*STAR (former SPRING) Singapore participated in CCPR-K1.a.1
NIMT participated in EURAMET.PR-K1.a.1
KRISS participated in APMP.PR-K1.a.1
NPL, PTB, INM-RO, METAS, SP, VNIIOFI and VSL participated in EURAMET.PR-K1.a

Results are presented under A4 printable format in Summary Results (.PDF file).

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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Degrees of Equivalence for spectral irradiance

in the interval from 370 nm to 750 nm

A*STAR (former SPRING) Singapore participated in CCPR-K1.a.1
NIMT participated in EURAMET.PR-K1.a.1
KRISS participated in APMP.PR-K1.a.1
NPL, PTB, INM-RO, METAS, SP, VNIIOFI and VSL participated in EURAMET.PR-K1.a

Results are presented under A4 printable format in Summary Results (.PDF file).

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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Degrees of Equivalence for spectral irradiance

in the interval from 800 nm to 1700 nm

A*STAR (former SPRING) Singapore participated in CCPR-K1.a.1
NIMT participated in EURAMET.PR-K1.a.1
KRISS participated in APMP.PR-K1.a.1
NPL, PTB, INM-RO, METAS, SP, VNIIOFI and VSL participated in EURAMET.PR-K1.a

Results are presented under A4 printable format in Summary Results (.PDF file).

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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Degrees of Equivalence for spectral irradiance

in the interval from 1800 nm to 2500 nm

A*STAR (former SPRING) Singapore participated in CCPR-K1.a.1
NIMT participated in EURAMET.PR-K1.a.1
KRISS participated in APMP.PR-K1.a.1
NPL, PTB, INM-RO, METAS, SP, VNIIOFI and VSL participated in EURAMET.PR-K1.a

Results are presented under A4 printable format in Summary Results (.PDF file).

Comparison
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RMO comparison
Linked comparison
EURAMET.PR-K1.a
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Metrology area, Sub-field Photometry and Radiometry, Properties of detectors and sources
Description Spectral irradiance
Time of measurements 2009
Status Approved for equivalence
Final Reports of the comparisons
Metrologia, 2015, 52, Tech. Suppl., 02003
Measurand Spectral irradiance
Parameters Wavelength from 250 nm to 2500 nm
Transfer device Detector Stabilized Lamps (DSL)
Comparison type Key Comparison
Consultative Committee CCPR (Consultative Committee for Photometry and Radiometry)
Conducted by EURAMET (European Association of National Metrology Institutes)
Comments

Results published on 24 September 2015

CCPR-K1.a.1 results (from 250 nm to 1600 nm), EURAMET.PR-K1.a.1 results (from 290 nm to 900 nm), APMP.PR-K1.a.1 and EURAMET.PR-K1.a results (from 250 nm to 2500 nm) are linked to those of CCPR-K1.a.

Spectral irradiance from 250 nm to 2500 nm
Pilot institute NPL
National Physical Laboratory
United Kingdom
Contact person T. Goodman

+44 (0) 20 8943 6863
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
NPL

National Physical Laboratory, United Kingdom, EURAMET

INM

National Institute of Metrology, Romania, EURAMET

METAS

Federal Institute of Metrology, Switzerland, EURAMET

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

VNIIOFI

All-Russian Scientific Institute for Optical and Physical Measurements, Rosstandart, Russian Federation, COOMET

VSL

VSL, Netherlands, EURAMET

Comparison
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Results
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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 250 nm to 360 nm

n.b. All wavelengths within this interval are not covered by all listed comparisons (cf. Degrees of Equivalence)

  • Key comparison CCPR-K1.a

This comparison was carried out independently at each wavelength.
At any one wavelength, the analysis is based on a model that regards each lamp as having a stable spectral irradiance and the measurement results provided by a participant as systematically influenced by a common factor. The value measured by a participant is an estimate of the lamp irradiance multiplied by the systematic factor of this participant.
Each lamp was measured on one or two occasions by a participant (considered as one or two rounds) and on one or two occasions (rounds) by the pilot. Each measurement of a lamp is described by the model equation xirk = Ek Si eirk, where xirk is the measurement result of participant i in round r of lamp k, Ek the irradiance of lamp k, Si the systematic factor associated with all measurements by participant i, and eirk the random- and round-dependent effects associated with this measurement of this lamp.
The aim of the analysis is to provide the best estimate of the systematic factor, Si, for each participant. This is achieved by solving, by least squares adjustment, a set of linked equations relating the participant's measured values to the lamp irradiances and systematic factors under a constraint, which defines the key comparison reference value.
Since the comparison consists of many separate artefacts, the key comparison reference value is itself unrelated to a physical artefact.

The key comparison reference value is calculated as the weighted geometric mean (with a cut-off) of the estimated systematic factors. It is stipulated to be unity by a special choice of the constraint equation.
The method is described in the CCPR-K1.a Final Report.
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di, the difference between the estimated systematic factor for that participant and the key comparison reference value, being unity, and Ui, its expanded uncertainty at a 95 % level of confidence (see section 17.6.2 of the CCPR-K1.a Final Report). Di and Ui are expressed in relative units.

 

  • Key comparison CCPR-K1.a.1
CCPR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between NMIA and SPRING Singapore. At any one common wavelength to both comparisons, the degree of equivalence of SPRING Singapore relative to the CCPR-K1.a reference value is computed using the NMIA results obtained in both comparisons, as explained in Section 9 of the CCPR-K1.a.1 Final Report (pages 20 to 24).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from SPRING Singapore.

 

  • Key comparison APMP.PR-K1.a.1
APMP.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between KRISS and VNIIOFI. At any one common wavelength to both comparisons, the degree of equivalence of KRISS relative to the CCPR-K1.a reference value is computed using the VNIIOFI results obtained in both comparisons, as explained in Section 6.2 and in Appendix C of the APMP.PR-K1.a.1 Final Report.

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from KRISS.

 

  • Key comparison EURAMET.PR-K1.a

EURAMET.PR-K1.a is a subsequent key comparison to CCPR-K1.a, between the NPL, PTB, INM-RO, METAS, SP, VNIIOFI and the VSL.
At any one common wavelength to both comparisons, the degree of equivalence of the NMIs relative to the CCPR-K1.a reference value is computed using the NPL and PTB results obtained in both comparisons, as explained in Section 4 of the EURAMET.PR-K1.a Final Report (pages 8 to 13).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with the results obtained by the EURAMET.PR-K1.a comparison.

 

  • Key comparison EURAMET.PR-K1.a.1
EURAMET.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between MIKES and NIMT. At any one common wavelength to both comparisons, the degree of equivalence of NIMT relative to the CCPR-K1.a reference value is computed using the MIKES (referred to as "HUT" at the time of the CCPR-K1.a key comparison) results obtained in both comparisons, as explained in the Appendix A of the EURAMET.PR-K1.a.1 Final Report (page 12).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from NIMT.
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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 370 nm to 750 nm

n.b. All wavelengths within this interval are not covered by all listed comparisons (cf. Degrees of Equivalence)

  • Key comparison CCPR-K1.a

This comparison was carried out independently at each wavelength.
At any one wavelength, the analysis is based on a model that regards each lamp as having a stable spectral irradiance and the measurement results provided by a participant as systematically influenced by a common factor. The value measured by a participant is an estimate of the lamp irradiance multiplied by the systematic factor of this participant.
Each lamp was measured on one or two occasions by a participant (considered as one or two rounds) and on one or two occasions (rounds) by the pilot. Each measurement of a lamp is described by the model equation xirk = Ek Si eirk, where xirk is the measurement result of participant i in round r of lamp k, Ek the irradiance of lamp k, Si the systematic factor associated with all measurements by participant i, and eirk the random- and round-dependent effects associated with this measurement of this lamp.
The aim of the analysis is to provide the best estimate of the systematic factor, Si, for each participant. This is achieved by solving, by least squares adjustment, a set of linked equations relating the participant's measured values to the lamp irradiances and systematic factors under a constraint, which defines the key comparison reference value.
Since the comparison consists of many separate artefacts, the key comparison reference value is itself unrelated to a physical artefact.

The key comparison reference value is calculated as the weighted geometric mean (with a cut-off) of the estimated systematic factors. It is stipulated to be unity by a special choice of the constraint equation.
The method is described in the CCPR-K1.a Final Report.
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di, the difference between the estimated systematic factor for that participant and the key comparison reference value, being unity, and Ui, its expanded uncertainty at a 95 % level of confidence (see section 17.6.2 of the CCPR-K1.a Final Report). Di and Ui are expressed in relative units.

 

  • Key comparison CCPR-K1.a.1
CCPR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between NMIA and SPRING Singapore. At any one common wavelength to both comparisons, the degree of equivalence of SPRING Singapore relative to the CCPR-K1.a reference value is computed using the NMIA results obtained in both comparisons, as explained in Section 9 of the CCPR-K1.a.1 Final Report (pages 20 to 24).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from SPRING Singapore.

 

  • Key comparison APMP.PR-K1.a.1
APMP.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between KRISS and VNIIOFI. At any one common wavelength to both comparisons, the degree of equivalence of KRISS relative to the CCPR-K1.a reference value is computed using the VNIIOFI results obtained in both comparisons, as explained in Section 6.2 and in Appendix C of the APMP.PR-K1.a.1 Final Report.

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from KRISS.

 

  • Key comparison EURAMET.PR-K1.a

EURAMET.PR-K1.a is a subsequent key comparison to CCPR-K1.a, between the NPL, PTB, INM-RO, METAS, SP, VNIIOFI and the VSL.
At any one common wavelength to both comparisons, the degree of equivalence of the NMIs relative to the CCPR-K1.a reference value is computed using the NPL and PTB results obtained in both comparisons, as explained in Section 4 of the EURAMET.PR-K1.a Final Report (pages 8 to 13).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with the results obtained by the EURAMET.PR-K1.a comparison.

 

  • Key comparison EURAMET.PR-K1.a.1
EURAMET.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between MIKES and NIMT. At any one common wavelength to both comparisons, the degree of equivalence of NIMT relative to the CCPR-K1.a reference value is computed using the MIKES (referred to as "HUT" at the time of the CCPR-K1.a key comparison) results obtained in both comparisons, as explained in the Appendix A of the EURAMET.PR-K1.a.1 Final Report (page 12).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from NIMT.
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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 800 nm to 1700 nm

n.b. All wavelengths within this interval are not covered by all listed comparisons (cf. Degrees of Equivalence)

  • Key comparison CCPR-K1.a

This comparison was carried out independently at each wavelength.
At any one wavelength, the analysis is based on a model that regards each lamp as having a stable spectral irradiance and the measurement results provided by a participant as systematically influenced by a common factor. The value measured by a participant is an estimate of the lamp irradiance multiplied by the systematic factor of this participant.
Each lamp was measured on one or two occasions by a participant (considered as one or two rounds) and on one or two occasions (rounds) by the pilot. Each measurement of a lamp is described by the model equation xirk = Ek Si eirk, where xirk is the measurement result of participant i in round r of lamp k, Ek the irradiance of lamp k, Si the systematic factor associated with all measurements by participant i, and eirk the random- and round-dependent effects associated with this measurement of this lamp.
The aim of the analysis is to provide the best estimate of the systematic factor, Si, for each participant. This is achieved by solving, by least squares adjustment, a set of linked equations relating the participant's measured values to the lamp irradiances and systematic factors under a constraint, which defines the key comparison reference value.
Since the comparison consists of many separate artefacts, the key comparison reference value is itself unrelated to a physical artefact.

The key comparison reference value is calculated as the weighted geometric mean (with a cut-off) of the estimated systematic factors. It is stipulated to be unity by a special choice of the constraint equation.
The method is described in the CCPR-K1.a Final Report.
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di, the difference between the estimated systematic factor for that participant and the key comparison reference value, being unity, and Ui, its expanded uncertainty at a 95 % level of confidence (see section 17.6.2 of the CCPR-K1.a Final Report). Di and Ui are expressed in relative units.

 

  • Key comparison CCPR-K1.a.1
CCPR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between NMIA and SPRING Singapore. At any one common wavelength to both comparisons, the degree of equivalence of SPRING Singapore relative to the CCPR-K1.a reference value is computed using the NMIA results obtained in both comparisons, as explained in Section 9 of the CCPR-K1.a.1 Final Report (pages 20 to 24).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from SPRING Singapore.

 

  • Key comparison APMP.PR-K1.a.1
APMP.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between KRISS and VNIIOFI. At any one common wavelength to both comparisons, the degree of equivalence of KRISS relative to the CCPR-K1.a reference value is computed using the VNIIOFI results obtained in both comparisons, as explained in Section 6.2 and in Appendix C of the APMP.PR-K1.a.1 Final Report.

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from KRISS.

 

  • Key comparison EURAMET.PR-K1.a

EURAMET.PR-K1.a is a subsequent key comparison to CCPR-K1.a, between the NPL, PTB, INM-RO, METAS, SP, VNIIOFI and the VSL.
At any one common wavelength to both comparisons, the degree of equivalence of the NMIs relative to the CCPR-K1.a reference value is computed using the NPL and PTB results obtained in both comparisons, as explained in Section 4 of the EURAMET.PR-K1.a Final Report (pages 8 to 13).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with the results obtained by the EURAMET.PR-K1.a comparison.

 

  • Key comparison EURAMET.PR-K1.a.1
EURAMET.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between MIKES and NIMT. At any one common wavelength to both comparisons, the degree of equivalence of NIMT relative to the CCPR-K1.a reference value is computed using the MIKES (referred to as "HUT" at the time of the CCPR-K1.a key comparison) results obtained in both comparisons, as explained in the Appendix A of the EURAMET.PR-K1.a.1 Final Report (page 12).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from NIMT.
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CCPR-K1.a, CCPR-K1.a.1, APMP.PR-K1.a.1, EURAMET.PR-K1.a and EURAMET.PR-K1.a.1

Spectral irradiance in the interval from 1800 nm to 2500 nm

n.b. All wavelengths within this interval are not covered by all listed comparisons (cf. Degrees of Equivalence)

  • Key comparison CCPR-K1.a

This comparison was carried out independently at each wavelength.
At any one wavelength, the analysis is based on a model that regards each lamp as having a stable spectral irradiance and the measurement results provided by a participant as systematically influenced by a common factor. The value measured by a participant is an estimate of the lamp irradiance multiplied by the systematic factor of this participant.
Each lamp was measured on one or two occasions by a participant (considered as one or two rounds) and on one or two occasions (rounds) by the pilot. Each measurement of a lamp is described by the model equation xirk = Ek Si eirk, where xirk is the measurement result of participant i in round r of lamp k, Ek the irradiance of lamp k, Si the systematic factor associated with all measurements by participant i, and eirk the random- and round-dependent effects associated with this measurement of this lamp.
The aim of the analysis is to provide the best estimate of the systematic factor, Si, for each participant. This is achieved by solving, by least squares adjustment, a set of linked equations relating the participant's measured values to the lamp irradiances and systematic factors under a constraint, which defines the key comparison reference value.
Since the comparison consists of many separate artefacts, the key comparison reference value is itself unrelated to a physical artefact.

The key comparison reference value is calculated as the weighted geometric mean (with a cut-off) of the estimated systematic factors. It is stipulated to be unity by a special choice of the constraint equation.
The method is described in the CCPR-K1.a Final Report.
The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di, the difference between the estimated systematic factor for that participant and the key comparison reference value, being unity, and Ui, its expanded uncertainty at a 95 % level of confidence (see section 17.6.2 of the CCPR-K1.a Final Report). Di and Ui are expressed in relative units.

 

  • Key comparison CCPR-K1.a.1
CCPR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between NMIA and SPRING Singapore. At any one common wavelength to both comparisons, the degree of equivalence of SPRING Singapore relative to the CCPR-K1.a reference value is computed using the NMIA results obtained in both comparisons, as explained in Section 9 of the CCPR-K1.a.1 Final Report (pages 20 to 24).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from SPRING Singapore.

 

  • Key comparison APMP.PR-K1.a.1
APMP.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between KRISS and VNIIOFI. At any one common wavelength to both comparisons, the degree of equivalence of KRISS relative to the CCPR-K1.a reference value is computed using the VNIIOFI results obtained in both comparisons, as explained in Section 6.2 and in Appendix C of the APMP.PR-K1.a.1 Final Report.

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from KRISS.

 

  • Key comparison EURAMET.PR-K1.a

EURAMET.PR-K1.a is a subsequent key comparison to CCPR-K1.a, between the NPL, PTB, INM-RO, METAS, SP, VNIIOFI and the VSL.
At any one common wavelength to both comparisons, the degree of equivalence of the NMIs relative to the CCPR-K1.a reference value is computed using the NPL and PTB results obtained in both comparisons, as explained in Section 4 of the EURAMET.PR-K1.a Final Report (pages 8 to 13).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with the results obtained by the EURAMET.PR-K1.a comparison.

 

  • Key comparison EURAMET.PR-K1.a.1
EURAMET.PR-K1.a.1 is a subsequent bilateral key comparison to CCPR-K1.a, between MIKES and NIMT. At any one common wavelength to both comparisons, the degree of equivalence of NIMT relative to the CCPR-K1.a reference value is computed using the MIKES (referred to as "HUT" at the time of the CCPR-K1.a key comparison) results obtained in both comparisons, as explained in the Appendix A of the EURAMET.PR-K1.a.1 Final Report (page 12).

This makes it possible to extend the CCPR-K1.a graphs of equivalence with one additional point from NIMT.
Comparison
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Results
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Measurement data are available in the EURAMET.PR-K1.a Final Report.

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Measurement data are available in the EURAMET.PR-K1.a Final Report.

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Measurement data are available in the EURAMET.PR-K1.a Final Report.

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Measurement data are available in the EURAMET.PR-K1.a Final Report.