CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 kHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence: Di and expanded uncertainty Ui (k = 2) expressed in
10-6
Click on the Graph to get the names of the participating laboratories
Red diamonds: participants in CCEM-K6.a
Green triangle: participant in EUROMET.EM-K6.a only
Blue circles: participants in SIM.EM-K6.a
Orange squares: participants in APMP.EM-K6.a only
Pink triangle: participant in SIM.EM-K6.1
Purple circles: participants in COOMET.EM-K6.a only
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 20 kHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence: Di and expanded uncertainty Ui (k = 2) expressed in
10-6
Click on the Graph to get the names of the participating laboratories
Red diamonds: participants in CCEM-K6.a
Green triangle: participant in EUROMET.EM-K6.a only
Blue circles: participants in SIM.EM-K6.a
Orange squares: participants in APMP.EM-K6.a only
Pink triangle: participant in SIM.EM-K6.1
Purple circles: participants in COOMET.EM-K6.a only
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 100 kHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence: Di and expanded uncertainty Ui (k = 2) expressed in
10-6
Click on the Graph to get the names of the participating laboratories
Red diamonds: participants in CCEM-K6.a
Green triangle: participant in EUROMET.EM-K6.a only
Blue circles: participants in SIM.EM-K6.a
Orange squares: participants in APMP.EM-K6.a only
Pink triangle: participant in SIM.EM-K6.1
Purple circles: participants in COOMET.EM-K6.a only
CCEM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 MHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence: Di and expanded uncertainty Ui (k = 2) expressed in
10-6
Click on the Graph to get the names of the participating laboratories
Red diamonds: participants in CCEM-K6.a
Blue circles: participants in SIM.EM-K6.a
Orange squares: participants in APMP.EM-K6.a only
Pink triangle: participant in SIM.EM-K6.1
Purple circles: participants in COOMET.EM-K6.a only
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 kHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
In black: laboratory contributing to the key comparison reference value
In orange: participant correlated with VSL
In green: participants correlated with PTB
*participant in EUROMET.EM-K6.a only
**participants in SIM.EM-K6.a
***participants in APMP.EM-K6.a only
****participant in SIM.EM-K6.1
In purple participants in COOMET.EM-K6.a only
Results are presented under A4 printable format in Summary Results (PDF file).
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 20 kHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
In black: laboratory contributing to the key comparison reference value
In orange: participant correlated with VSL
In green: participants correlated with PTB
*participant in EUROMET.EM-K6.a only
**participants in SIM.EM-K6.a
***participants in APMP.EM-K6.a only
****participant in SIM.EM-K6.1
In purple participants in COOMET.EM-K6.a only
Results are presented under A4 printable format in Summary Results (PDF file).
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 100 kHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
In black: laboratory contributing to the key comparison reference value
In orange: participant correlated with VSL
In green: participants correlated with PTB
*participant in EUROMET.EM-K6.a only
**participants in SIM.EM-K6.a
***participants in APMP.EM-K6.a only
****participant in SIM.EM-K6.1
In purple participants in COOMET.EM-K6.a only
Results are presented under A4 printable format in Summary Results (PDF file).
CCEM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 MHz
NOMINAL VOLTAGE : 3 V
Degrees of equivalence Di and expanded uncertainty Ui (k = 2)
In black: laboratory contributing to the key comparison reference value
In orange: participant correlated with VSL
In green: participants correlated with PTB
**participants in SIM.EM-K6.a
***participants in APMP.EM-K6.a only
****participant in SIM.EM-K6.1
In purple participants in COOMET.EM-K6.a only
Results are presented under A4 printable format in Summary Results (PDF file).
| Metrology area, Sub-field | Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer |
| Description | Comparison of AC/DC voltage transfer standards |
| Time of measurements | 2006 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| Measurand | AC/DC voltage transfer difference |
| Parameters | Voltage: 3 V Frequency: 55 Hz, 1 kHz, 20 kHz and 100 kHz |
| Transfer device | Fluke 792A thermal transfer standard |
| Comparison type | Key Comparison |
| Consultative Committee | CCEM (Consultative Committee for Electricity and Magnetism) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| Comments | Results published on 19 October 2007 EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a results are linked to those of CCEM-K6.a AC/DC voltage transfer standards at 3 V and three frequencies
|
| Pilot institute |
PTB
Physikalisch-Technische Bundesanstalt Germany |
| Contact person | T. Funck +49 (0) 531 592 2320 |
| Pilot laboratory | |
|---|---|
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 kHz
NOMINAL VOLTAGE : 3 V
| The key comparison reference value dREF of this comparison at 1 kHz is taken from the theoretical and experimental evaluation of MJTCs* at the PTB to be dREF = 0 x 10-6. Its expanded uncertainty UREF is also taken from the theoretical and experimental evaluation of MJTCs* at the PTB to be UREF = 0.4 x 10-6 (k = 2). No transfer uncertainty has to be taken into account. *MJTCs: Multi-junction thermal voltage converters |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (dLab i - dREF) and Ui, its expanded uncertainty (k = 2), Ui = (ULab i2 + UREF2)1/2. For PTB, which contributes to the reference value, Ui = (ULab i2 - UREF2)1/2. |
| The Working Group on Key Comparisons of the CCEM judges that significant correlations exist among the results of participants whose reference standard of AC/DC difference is based on calibrations carried out by another participating laboratory. Although these correlations have a profound effect on the uncertainty of degrees of equivalence between pairs of NMIs, a sufficiently accurate evaluation of covariance terms has not been identified. Consequently this Appendix B entry does not include explicit values and uncertainties of degrees of equivalence among pairs of participants. |
|
PTB provides the link between key comparisons CCEM-K6.a and EUROMET.EM-K6.a. The linkage process is described in Section 5.2 of the EUROMET.EM-K6.a Final Report. |
|
NRC and NIST provide the link between key comparisons CCEM-K6.a and SIM.EM-K6.a. The linkage process is described in Section 11 of SIM.EM-K6.a Final Report. |
NMIA and PTB provide the link between key comparisons CCEM-K6.a and APMP.EM-K6.a. The linkage process is described in Section 12 of the APMP.EM-K6.a Final Report.
LNE provides the link between key comparisons CCEM-K6.a and SIM.EM-K6.1. The linkage process is described in Section 9 of the SIM.EM-K6.1 Final Report.
VNIIM provides the link between key comparisons CCEM-K6.a and COOMET.EM-K6.a. The linkage process is described in Section 7.4 of the COOMET.EM-K6.a Final Report.
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 20 kHz
NOMINAL VOLTAGE : 3 V
| The key comparison reference value dREF of this comparison at 20 kHz is computed as a weighted mean using weights proportional to the reciprocal of the square of the uncertainty of the laboratories ULab i. At 20 kHz the results from seven participants with independent realisations of their AC/DC voltage transfer standards are taken into account: dREF = 0.9 x 10-6. The expanded uncertainty UREF of dREF is the standard uncertainty of the weighted mean multiplied by k = 2: UREF = 0.52 x 10-6 (k = 2). No transfer uncertainty has to be taken into account. |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (dLab i - dREF) and Ui, its expanded uncertainty (k = 2), Ui = (ULab i2 + UREF2)1/2. For those laboratories which contribute to the reference value, Ui = (ULab i2 - UREF2)1/2. |
| The Working Group on Key Comparisons of the CCEM judges that significant correlations exist among the results of participants whose reference standard of AC/DC difference is based on calibrations carried out by another participating laboratory. Although these correlations have a profound effect on the uncertainty of degrees of equivalence between pairs of NMIs, a sufficiently accurate evaluation of covariance terms has not been identified. Consequently this Appendix B entry does not include explicit values and uncertainties of degrees of equivalence among pairs of participants. |
|
PTB provides the link between key comparisons CCEM-K6.a and EUROMET.EM-K6.a. The linkage process is described in Section 5.2 of the EUROMET.EM-K6.a Final Report. |
|
NRC and NIST provide the link between key comparisons CCEM-K6.a and SIM.EM-K6.a. The linkage process is described in Section 11 of SIM.EM-K6.a Final Report. |
NMIA and PTB provide the link between key comparisons CCEM-K6.a and APMP.EM-K6.a. The linkage process is described in Section 12 of the APMP.EM-K6.a Final Report.
LNE provides the link between key comparisons CCEM-K6.a and SIM.EM-K6.1. The linkage process is described in Section 9 of the SIM.EM-K6.1 Final Report.
VNIIM provides the link between key comparisons CCEM-K6.a and COOMET.EM-K6.a. The linkage process is described in Section 7.4 of the COOMET.EM-K6.a Final Report.
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 100 kHz
NOMINAL VOLTAGE : 3 V
|
The key comparison reference value dREF of this comparison at 20 kHz is computed as a weighted mean using weights proportional to the reciprocal of the square of the uncertainty of the laboratories ULab i. At 20 kHz the results from seven participants with independent realisations of their AC/DC voltage transfer standards are taken into account: dREF = 7.2x 10-6. The expanded uncertainty UREF of dREF is the standard uncertainty of the weighted mean multiplied by k = 2: UREF = 1.0 x 10-6 (k = 2). |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (dLab i - dREF) and Ui, its expanded uncertainty (k = 2), Ui = (ULab i2 + UREF2)1/2. For those laboratories which contribute to the reference value, Ui = (ULab i2 - UREF2)1/2. |
| The Working Group on Key Comparisons of the CCEM judges that significant correlations exist among the results of participants whose reference standard of AC/DC difference is based on calibrations carried out by another participating laboratory. Although these correlations have a profound effect on the uncertainty of degrees of equivalence between pairs of NMIs, a sufficiently accurate evaluation of covariance terms has not been identified. Consequently this Appendix B entry does not include explicit values and uncertainties of degrees of equivalence among pairs of participants. |
|
PTB provides the link between key comparisons CCEM-K6.a and EUROMET.EM-K6.a. The linkage process is described in Section 5.2 of the EUROMET.EM-K6.a Final Report. |
|
NRC and NIST provide the link between key comparisons CCEM-K6.a and SIM.EM-K6.a. The linkage process is described in Section 11 of SIM.EM-K6.a Final Report. |
NMIA and PTB provide the link between key comparisons CCEM-K6.a and APMP.EM-K6.a. The linkage process is described in Section 12 of the APMP.EM-K6.a Final Report.
LNE provides the link between key comparisons CCEM-K6.a and SIM.EM-K6.1. The linkage process is described in Section 9 of the SIM.EM-K6.1 Final Report.
VNIIM provides the link between key comparisons CCEM-K6.a and COOMET.EM-K6.a. The linkage process is described in Section 7.4 of the COOMET.EM-K6.a Final Report.
CCEM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 MHz
NOMINAL VOLTAGE : 3 V
| The key comparison reference value dREF of this comparison at 1 kHz is taken from the theoretical and experimental evaluation of MJTCs* at the PTB to be dREF = 121 x 10-6. Its expanded uncertainty UREF is also taken from the theoretical and experimental evaluation of MJTCs* at the PTB to be UREF = 6.7 x 10-6 (k = 2). No transfer uncertainty has to be taken into account. *MJTCs: Multi-junction thermal voltage converters |
| The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: Di = (dLab i - dREF) and Ui, its expanded uncertainty (k = 2), Ui = (ULab i2 + UREF2)1/2. For PTB, which contributes to the reference value, Ui = (ULab i2 - UREF2)1/2. |
| The Working Group on Key Comparisons of the CCEM judges that significant correlations exist among the results of participants whose reference standard of AC/DC difference is based on calibrations carried out by another participating laboratory. Although these correlations have a profound effect on the uncertainty of degrees of equivalence between pairs of NMIs, a sufficiently accurate evaluation of covariance terms has not been identified. Consequently this Appendix B entry does not include explicit values and uncertainties of degrees of equivalence among pairs of participants. |
|
NRC and NIST provide the link between key comparisons CCEM-K6.a and SIM.EM-K6.a. The linkage process is described in Section 11 of SIM.EM-K6.a Final Report. |
NMIA and PTB provide the link between key comparisons CCEM-K6.a and APMP.EM-K6.a. The linkage process is described in Section 12 of the APMP.EM-K6.a Final Report.
LNE provides the link between key comparisons CCEM-K6.a and SIM.EM-K6.1. The linkage process is described in Section 9 of the SIM.EM-K6.1 Final Report.
VNIIM provides the link between key comparisons CCEM-K6.a and COOMET.EM-K6.a. The linkage process is described in Section 7.4 of the COOMET.EM-K6.a Final Report.
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 kHz
NOMINAL VOLTAGE : 3 V
dLab i : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of dLab i
| Lab i | dLab i / 10-6 |
ULab i / 10-6 |
Date of measurement |
| NPL | -0.1 | 1.8 | Jan 94 |
| INRIM | 0.1 | 0.6 | Feb 94 |
| VSL | -0.1 | 1.8 | Mar 94 |
| SP | 0.2 | 1.0 | Aug 94 |
| METAS | 0.0 | 1.0 | Sep 94 |
| IPQ | 0.0 | 1.3 | Feb 95 |
| CEM | -0.1 | 1.2 | Mar 95 |
| NRC | -0.1 | 0.4 | Apr 95 |
| NIST | -0.2 | 0.9 | Jun 95 |
| KRISS | 0.0 | 2.7 | Sep 95 |
| NPLI | 0.3 | 1.0 | Dec 95 |
| INTI | 0.3 | 2.0 | Apr 96 |
| NIM | -0.5 | 0.6 | May 96 |
| JV | 0.1 | 2.4 | Jan 97 |
| BEV | 0.0 | 1.2 | Oct 97 |
| VNIIM | 0.2 | 1.5 | Mar 98 |
| NMIA | -0.2 | 1.5 | Dec 98 |
| NMISA | 0.4 | 2.4 | Jan 99 |
| MIKES | 0.0 | 1.0 | Apr 99 |
| AREPA | -0.6 | 2.0 | May 99 |
| LNE | 0.1 | 1.0 | Jun 99 |
| PTB | 0.1 | 0.4 | Aug 93, Jan 95, Mar 96, Oct 96, Oct 98, May 99 |
dLab i-EUR : result of measurement carried out by laboratory i participant in EUROMET.EM-K6.a
ULab i-EUR : expanded uncertainty (k = 2) of dLab i-EUR
| Lab i | dLab i-EUR / 10-6 |
ULab i-EUR / 10-6 |
Date of measurement |
| PTB | 0.9 | 2 | Feb 06, Aug 06 |
| BIM | 0.1 | 16 | Mar 06 to Jun 06 |
dLab i-SIM : result of measurement carried out by laboratory i participant in SIM.EM-K6.a
ULab i-SIM : expanded uncertainty (k = 2) of dLab i-SIM
uLab i-SIM : standard uncertainty (k = 1) of dLab i-SIM
| Lab i | dLab i-SIM / (µV/V) |
ULab i-SIM / (µV/V) |
Date of measurement |
| NIST | 0.0 | 3.2 | Jan to Feb 04 |
| INMETRO | 1.0 | 4 | 28 Jun to 28 July 04 |
| CENAM |
0.9 |
6 |
03 to 20 Aug 04 |
| NRC |
0.3 |
1.2 |
Sep to Oct 04 |
| Lab i | dLab i-SIM / (µV/V) |
uLab i-SIM / (µV/V) |
Date of measurement |
| UTE | 3.0 | 5.5 | 18 May to 22 Jun 04 |
Measurement results of the participants in key comparison APMP.EM-K6.a are given in Table 4 (Section 10, on page 8) of the Final Report. They were taken between 2000 and 2003.
Measurement results of the participants in key comparison SIM.EM-K6.1 are given in Table II (Section 8.1, on page 7) of the Final Report. They were taken between September 2012 and January 2013.
Measurement results of the participants in key comparison COOMET.EM-K6.a are given in Table 5 (Section 7.1, on page 7) of the Final Report. They were taken between May 2013 and March 2014.
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 20 kHz
NOMINAL VOLTAGE : 3 V
dLab i : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of dLab i
| Lab i | dLab i / 10-6 |
ULab i / 10-6 |
Date of measurement |
| NPL | 0.9 | 2.0 | Jan 94 |
| INRIM | 0.7 | 0.8 | Feb 94 |
| VSL | 1.4 | 2.6 | Mar 94 |
| SP | 1.4 | 3.2 | Aug 94 |
| METAS | 1.4 | 2.0 | Sep 94 |
| IPQ | 1.5 | 4.0 | Feb 95 |
| CEM | 0.7 | 1.4 | Mar 95 |
| NRC | 1.4 | 1.2 | Apr 95 |
| NIST | 1.3 | 1.3 | Jun 95 |
| KRISS | 1.4 | 5.6 | Sep 95 |
| NPLI | 0.4 | 1.0 | Dec 95 |
| INTI | 0.2 | 3.0 | Apr 96 |
| JV | 1.1 | 3.0 | Jan 97 |
| BEV | 1.1 | 2.2 | Oct 97 |
| VNIIM | 1.0 | 6.0 | Mar 98 |
| NMIA | 0.7 | 2.2 | Dec 98 |
| NMISA | 1.3 | 3.0 | Jan 99 |
| MIKES | 1.4 | 2.8 | Apr 99 |
| AREPA | 0.3 | 2.0 | May 99 |
| LNE | 1.2 | 2.2 | Jun 99 |
| PTB | 1.2 | 1.0 | Aug 93, Jan 95, Mar 96, Oct 96, Oct 98, May 99 |
dLab i-EUR : result of measurement carried out by laboratory i participant in EUROMET.EM-K6.a
ULab i-EUR : expanded uncertainty (k = 2) of dLab i-EUR
| Lab i | dLab i-EUR / 10-6 |
ULab i-EUR / 10-6 |
Date of measurement |
| PTB | 7.6 | 2 | Feb 06, Aug 06 |
| BIM | 1.4 | 13 | Mar 06 to Jun 06 |
dLab i-SIM : result of measurement carried out by laboratory i participant in SIM.EM-K6.a
ULab i-SIM : expanded uncertainty (k = 2) of dLab i-SIM
uLab i-SIM : standard uncertainty (k = 1) of dLab i-SIM
| Lab i | dLab i-SIM / (µV/V) |
ULab i-SIM / (µV/V) |
Date of measurement |
| NIST | 2.0 | 3.2 | Jan to Feb 04 |
| INMETRO | 4.0 | 4 | 28 Jun to 28 July 04 |
| CENAM |
2.5 |
6 |
03 to 20 Aug 04 |
| NRC |
2.5 |
2.8 |
Sep to Oct 04 |
| Lab i | dLab i-SIM / (µV/V) |
uLab i-SIM / (µV/V) |
Date of measurement |
| UTE | 6.0 | 5.4 | 18 May to 22 Jun 04 |
Measurement results of the participants in key comparison APMP.EM-K6.a are given in Table 4 (Section 10, on page 8) of the Final Report. They were taken between 2000 and 2003.
Measurement results of the participants in key comparison SIM.EM-K6.1 are given in Table II (Section 8.1, on page 7) of the Final Report. They were taken between September 2012 and January 2013.
Measurement results of the participants in key comparison COOMET.EM-K6.a are given in Table 5 (Section 7.1, on page 7) of the Final Report. They were taken between May 2013 and March 2014.
CCEM-K6.a, EUROMET.EM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 100 kHz
NOMINAL VOLTAGE : 3 V
dLab i : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of dLab i
| Lab i | dLab i / 10-6 |
ULab i / 10-6 |
Date of measurement |
| NPL | 8.7 | 2.6 | Jan 94 |
| INRIM | 6.1 | 2.0 | Feb 94 |
| VSL | 7.1 | 5.6 | Mar 94 |
| SP | 7.7 | 4.0 | Aug 94 |
| METAS | 7.7 | 5.4 | Sep 94 |
| IPQ | 7.5 | 8.0 | Feb 95 |
| CEM | 8.7 | 1.8 | Mar 95 |
| NRC | 8.6 | 2.0 | Apr 95 |
| NIST | 8.4 | 2.0 | Jun 95 |
| KRISS | 7.4 | 5.6 | Sep 95 |
| NPLI | 5.7 | 2.4 | Dec 95 |
| INTI | 6.6 | 6.0 | Apr 96 |
| JV | 6.1 | 4.7 | Jan 97 |
| BEV | 6.4 | 2.4 | Oct 97 |
| VNIIM | 4.2 | 10 | Mar 98 |
| NMIA | 5.9 | 4.6 | Dec 98 |
| NMISA | 4.9 | 3.8 | Jan 99 |
| MIKES | 6.5 | 3.0 | Apr 99 |
| AREPA | 7.0 | 2.0 | May 99 |
| LNE | 7.7 | 4.6 | Jun 99 |
| PTB | 6.3 | 2.0 | Aug 93, Jan 95, Mar 96, Oct 96, Oct 98, May 99 |
dLab i-EUR : result of measurement carried out by laboratory i participant in EUROMET.EM-K6.a
ULab i-EUR : expanded uncertainty (k = 2) of dLab i-EUR
| Lab i | dLab i-EUR / 10-6 |
ULab i-EUR / 10-6 |
Date of measurement |
| PTB | 22.0 | 3 | Feb 06, Aug 06 |
| BIM | 15.2 | 16 | Mar 06 to Jun 06 |
dLab i-SIM : result of measurement carried out by laboratory i participant in SIM.EM-K6.a
ULab i-SIM : expanded uncertainty (k = 2) of dLab i-SIM
uLab i-SIM : standard uncertainty (k = 1) of dLab i-SIM
| Lab i | dLab i-SIM / (µV/V) |
ULab i-SIM / (µV/V) |
Date of measurement |
| NIST | 16.0 | 8.5 | Jan to Feb 04 |
| INMETRO | 13.0 | 5 | 28 Jun to 28 July 04 |
| CENAM |
16.3 |
8 |
03 to 20 Aug 04 |
| NRC |
16.5 |
7.2 |
Sep to Oct 04 |
| Lab i | dLab i-SIM / (µV/V) |
uLab i-SIM / (µV/V) |
Date of measurement |
| UTE | 18.0 | 9.5 | 18 May to 22 Jun 04 |
Measurement results of the participants in key comparison APMP.EM-K6.a are given in Table 4 (Section 10, on page 8) of the Final Report. They were taken between 2000 and 2003.
Measurement results of the participants in key comparison SIM.EM-K6.1 are given in Table II (Section 8.1, on page 7) of the Final Report. They were taken between September 2012 and January 2013.
Measurement results of the participants in key comparison COOMET.EM-K6.a are given in Table 5 (Section 7.1, on page 7) of the Final Report. They were taken between May 2013 and March 2014.
Measurement results of the participants in key comparison COOMET.EM-K6.a are given in Table 5 (Section 7.1, on page 7) of the Final Report. They were taken between May 2013 and March 2014.
CCEM-K6.a, SIM.EM-K6.a, APMP.EM-K6.a, SIM.EM-K6.1 and COOMET.EM-K6.a
MEASURAND : AC/DC voltage transfer difference
MEASUREMENT FREQUENCY : 1 MHz
NOMINAL VOLTAGE : 3 V
dLab i : result of measurement carried out by laboratory i
ULab i : expanded uncertainty (k = 2) of dLab i
| Lab i | dLab i / 10-6 |
ULab i / 10-6 |
Date of measurement |
| NPL | 127 | 10 | Jan 94 |
| INRIM | 120 | 13 | Feb 94 |
| VSL | 128 | 20 | Mar 94 |
| SP | 112 | 20 | Aug 94 |
| METAS | 116 | 42 | Sep 94 |
| IPQ | 104 | 70 | Feb 95 |
| CEM | 111 | 20 | Mar 95 |
| NRC | 111 | 13 | Apr 95 |
| NIST | 129 | 21 | Jun 95 |
| KRISS | 112 | 100 | Sep 95 |
| NPLI | 115 | 22 | Dec 95 |
| INTI | 98 | 24 | Apr 96 |
| JV | 110 | 26 | Jan 97 |
| BEV | 114 | 31 | Oct 97 |
| VNIIM | 103 | 32 | Mar 98 |
| NMIA | 120 | 24 | Dec 98 |
| NMISA | 100 | 31 | Jan 99 |
| MIKES | 114 | 30 | Apr 99 |
| AREPA | 99 | 28 | May 99 |
| LNE | 148 | 41 | Jun 99 |
| PTB | 107 | 24 | Aug 93, Jan 95, Mar 96, Oct 96, Oct 98, May 99 |
dLab i-SIM : result of measurement carried out by laboratory i participant in SIM.EM-K6.a
ULab i-SIM : expanded uncertainty (k = 2) of dLab i-SIM
uLab i-SIM : standard uncertainty (k = 1) of dLab i-SIM
| Lab i | dLab i-SIM / (µV/V) |
ULab i-SIM / (µV/V) |
Date of measurement |
| NIST | 1.0 | 17.2 | Jan to Feb 04 |
| INMETRO | -22.0 | 32 | 28 Jun to 28 July 04 |
| CENAM |
4.4 |
38 |
03 to 20 Aug 04 |
| NRC |
10 |
17 |
Sep to Oct 04 |
| Lab i | dLab i-SIM / (µV/V) |
uLab i-SIM / (µV/V) |
Date of measurement |
| UTE | 3.0 | 30 | 18 May to 22 Jun 04 |
Measurement results of the participants in key comparison APMP.EM-K6.a are given in Table 4 (Section 10, on page 8) of the Final Report. They were taken between 2000 and 2003.
Measurement results of the participants in key comparison SIM.EM-K6.1 are given in Table II (Section 8.1, on page 7) of the Final Report. They were taken between September 2012 and January 2013.
Measurement results of the participants in key comparison COOMET.EM-K6.a are given in Table 5 (Section 7.1, on page 7) of the Final Report. They were taken between May 2013 and March 2014.
