BIPM.L-K11, APMP.L-K11 and APMP.L-K11.1
MEASURAND : Absolute frequency of the reference component of the corresponding recommended radiation for the practical realization of the definition of the metre
WAVELENGTH: 633 nm (recommended frequency: 473 612 353 604 kHz)
No graph of equivalence is drawn up for these comparisons.
The graph of measurements is available from the page "Laboratory Individual Measurements"." .< FONT>
BIPM.L-K11, APMP.L-K11 and APMP.L-K11.1
MEASURAND : Absolute frequency of the reference component of the corresponding recommended radiation for the practical realization of the definition of the metre
WAVELENGTH: 633 nm (recommended frequency: 473 612 353 604 kHz)
No degrees of equivalence are computed for these comparisons.
| Metrology area, Sub-field | Length, Laser Frequencies |
| Description | Comparison of primary wavelength standards |
| Time of measurements | 2004 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | Absolute frequency of the reference component of the recommended radiation at wavelength 633 nm for the practical realization of the definition of the metre |
| Comparison type | Key Comparison |
| Consultative Committee | CCL (Consultative Committee for Length ) |
| Conducted by | APMP (Asia Pacific Metrology Programme) |
| Comments | Results of this comparison are presented together with those of key comparison BIPM.L-K11. APMP.L-K11 results published on 17 August 2007 |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | L. Robertsson +33 (0) 1 45 07 70 53 |
| CMS/ITRI |
Industrial Technology Research Institute/Center for Measurement Standards, Chinese Taipei, APMP |
| Standard NML-04 |
| MSL |
Measurement Standards Laboratory, New Zealand, APMP |
| Standard MSL-1 |
| NIM |
National Institute of Metrology, China, APMP |
| Standards NIM-D1 and NIM-C4 |
| NIMT |
National Institute of Metrology (Thailand), Thailand, APMP |
| Standard NMIT-1 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| Standard NRLM-03 |
| NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |
| Standard CSIR-04 |
| NML-SIRIM |
National Metrology Laboratory, SIRIM Berhad (became NMIM), Malaysia, APMP |
| Standard NML-SIRIM-1 |
| SCL |
Standards and Calibration Laboratory, Hong Kong, China, APMP |
| Standard SCL-1 |
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BIPM.L-K11, APMP.L-K11 and APMP.L-K11.1
MEASURAND : Absolute frequency of the reference component of the corresponding recommended radiation for the practical realization of the definition of the metre
WAVELENGTH: 633 nm (recommended frequency: 473 612 353 604 kHz)
No key comparison reference value is computed.
BIPM.L-K11, APMP.L-K11 and APMP.L-K11.1
MEASURAND : Absolute frequency of the reference component of the corresponding recommended radiation for the practical realization of the definition of the metre
WAVELENGTH: 633 nm (recommended frequency: 473 612 353 604 kHz)
dfi : absolute frequency measured for Standard i, shifted by f0 = 473 612 353 000 kHz, dfi = fi - f0
ui1 : standard uncertainty stemming from the measurement of Standard i
ui2 : estimated uncertainty propagated from the uncertainty in the values of the working parameters for Standard i
uic : root-sum-square of ui1 and ui2, given at a confidence level of 68 % assuming a large number of degrees of freedom
| Laboratory | Standard i | dfi / kHz |
ui1 |
ui2 / kHz |
uic / kHz |
| NIS |
NIS-165 |
603.8 |
0.16 |
1.7 |
1.7 |
| IPQ |
IPQ2 |
602.7 |
0.91 |
2.0 |
2.2 |
| VNIIM |
VNIIM2 |
603.6 |
0.13 |
0.8 |
0.8 |
| NMISA |
CSIR-04 |
599.0 |
0.14 |
3.3 |
3.3 |
| NIM |
NIM-D1 |
595.1 |
0.09 |
1.9 |
1.9 |
| LNE-INM |
INM9 |
602.3 |
0.04 |
1.6 |
1.6 |
| NMi-VSL |
NMi-5 |
597.6 |
0.22 |
2.3 |
2.3 |
| SP |
SP2 |
602.9 |
0.73 |
6.8 |
6.8 |
| DFM |
DK1 |
607.2* |
0.28 |
2.1 |
2.1 |
| EIM |
EIM-1 |
610.7 |
0.26 |
2.0 |
2.0 |
| INM(RO) |
INM PHT/HE/97 |
612.7 |
0.18 |
4.1 |
4.1 |
| SMU |
SMU-1 |
606.9 |
0.20 |
2.4 |
2.4 |
| NMIJ | NRLM-03 |
607.2 |
0.70 |
5.3 |
5.3 |
| UME | UME-L3 |
600.6 |
0.10 |
1.2 |
1.2 |
| NML-SIRIM | NML-SIRIM-1 |
607.7 |
0.08 |
2.2 |
2.2 |
| CEM | CEM2 |
609.1 |
0.09 |
2.0 |
2.0 |
| IPQ | IPQ3 |
601.5 |
0.22 |
2.5 |
2.5 |
| NPLI | NPL-I(1) |
607.1 |
0.07 |
2.4 |
2.4 |
| INRIM | INRIM 4/P |
605.7 |
0.10 |
2.8 |
2.8 |
| LNE-INM | INM 125 |
605.3 |
0.16 |
1.8 |
1.8 |
| KRISS | KRISS-R061 |
609.2 |
0.18 |
1.5 |
1.5 |
| NIS | NIS-165 |
602.6 |
0.14 |
2.0 |
2.0 |
| UME | UME-L3 |
602.3 |
0.19 |
1.1 |
1.1 |
| NIM | NIM-D1 |
595.5 |
0.7 |
1.9 |
2.0 |
| NMIJ | NRLM-03 |
606.5 |
1.5 |
5.1 |
5.3 |
| NMISA | CSIR-04 |
598.2 |
1.0 |
3.3 |
3.4 |
| NML-SIRIM | NML-SIRIM-1 |
609.0 |
0.7 |
1.9 |
2.0 |
| SCL | SCL-1 |
605.5 |
0.8 |
3.4 |
3.5 |
| NIMT | NIMT-1 |
609.7 |
1.1 |
2.0 |
2.3 |
| NIM | NIM-C4 |
606.7 |
1.6 |
2.1 |
2.6 |
| MSL | MSL-1 |
604.5 |
0.7 |
2.1 |
2.2 |
| CMS/ITRI | NML-4 |
608.9 |
1.3 |
1.9 |
2.3 |
| KRISS | KRISS-R061 |
609.7 |
0.12 |
1.75 |
1.75 |
| VMI-STAMEQ | VMI-V01-TB1.01 |
609.6 |
0.17 |
1.78 |
1.79 |
* value corrected for a known offset of -2.1 kHz
In green: lasers having been measured in APMP.L-K11
In pink: lasers having been measured in APMP.L-K11.1
This data is also available in Summary Results (PDF file presented under A4 printable format).
Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO-31-0 Annex B Rule B.
GRAPH OF MEASUREMENTS: dfi and uic, expressed in kHz
Click on the graph to have a closer view:
Full line: CCL recommended value dfR = 604 kHz
Dash lines: corresponding standard uncertainty uR = 10 kHz
