The KCDB - the BIPM key comparison database – supports the CIPM MRA. The KCDB contains information on the internationally recognized Calibration and Measurement Capabilities (CMCs) for services available from the participating institutes, and the key and supplementary comparisons supporting these CMCs.

All data listed in the KCDB have been reviewed and approved within the CIPM Mutual Recognition Arrangement
**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 Hz**

**Degrees of equivalence relative to the key comparison refrence value: offsets D_{i} and expanded uncertainties (k = 2) U_{i}, both expressed in µA/A**

**Red diamonds: participants in CCEM-K12
Blue squares: participants in SIM.EM-K12
Green circles: participants in EURAMET.EM-K12**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 55 Hz**

**Degrees of equivalence relative to the key comparison refrence value: offsets D_{i} and expanded uncertainties (k = 2) U_{i}, both expressed in µA/A**

**Red diamonds: participants in CCEM-K12
Blue squares: participants in SIM.EM-K12
Green circles: participants in EURAMET.EM-K12**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 1 kHz**

**Degrees of equivalence relative to the key comparison refrence value: offsets D_{i} and expanded uncertainties (k = 2) U_{i}, both expressed in µA/A**

**Red diamonds: participants in CCEM-K12
Blue squares: participants in SIM.EM-K12
Green circles: participants in EURAMET.EM-K12**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 20 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 50 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 100 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 Hz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 55 Hz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 1 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 20 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 50 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 100 kHz**

*D _{i}* and expanded uncertainties (

Blue squares: participants in SIM.EM-K12

Green circles: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 Hz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 55 Hz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 1 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 20 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 50 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 100 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 Hz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 55 Hz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 1 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 20 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 50 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 100 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

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

EURAMET.EM-K12

Metrology area, Sub-field | Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer |

Description | Comparison of AC/DC current transfer standards |

Time of measurements | 2012 - 2014 |

Status | Approved for equivalence |

Final Reports of the comparisons | |

References | |

Measurand | AC/DC current transfer difference |

Parameters | Current: 10 mA and 5 A Frequency: 10 Hz, 55 Hz, 1 kHz, 10 kHz, 20 kHz, 50 kHz and 100 kHz |

Transfer device | Thermal converters |

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 22 August 2017 SIM.EM-K12 and EURAMET.EM-K12 results are linked to those of CCEM-K12 |

Pilot institute |
BEV
Bundesamt für Eich- und Vermessungswesen Austria |

Contact person | Wolfgang Waldmann +43 1 21110 826350 |

Pilot laboratory | |
---|---|

BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |

AS METROSERT |
Central Office of Metrology, Estonia, EURAMET |

BIM |
Bulgarian Institute of Metrology, Bulgaria, EURAMET |

CEM |
Centro Español de Metrologia, Spain, EURAMET |

CMI |
Czech Metrology Institute, Czechia, EURAMET |

GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |

INRIM |
Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET |

IPQ |
Instituto Portugues da Qualidade, Portugal, EURAMET |

JV |
Justervesenet, Norway, EURAMET |

LNE |
Laboratoire national de métrologie et d'essais, France, EURAMET |

METAS |
Federal Institute of Metrology, Switzerland, EURAMET |

NIS |
National Institute for Standards, Egypt, AFRIMETS |

NPL |
National Physical Laboratory, United Kingdom, EURAMET |

NSAI NML |
NSAI National Metrology Laboratory, Ireland, EURAMET |

PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |

Trescal |
Trescal Ltd, Denmark, EURAMET |

UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |

VSL |
VSL, Netherlands, 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" :

Results:

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 Hz**

*The measured AC-DC differences at 10 mA are reported in Table V (p. 9) in the SIM.EM-K12 Final Report.*

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 Hz**

*The measured AC-DC differences at 10 mA are reported in Table 3 (p. 12) in the EURAMET.EM-K12 Final Report.*

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 55 Hz**

**Key comparison CCEM-K12**

The key comparison reference value, At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 1 kHz**

**Key comparison CCEM-K12**

The key comparison reference value, At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 kHz**

**Key comparison CCEM-K12**

The key comparison reference value, At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

The degree of equivalence of laboratory , and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 20 kHz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 50 kHz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 100 kHz**

**Degrees of equivalence, D_{i} and expanded uncertainty U_{i} (k = 2), expressed in µA/A**

**Dark blue**: participants in CCEM-K12

**Blue**: participants in SIM.EM-K12

**Green**: participants in EURAMET.EM-K12

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 Hz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 55 Hz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 1 kHz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 kHz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 20 kHz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 50 kHz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 100 kHz**

**Key comparison CCEM-K12**

At 10 mA, the key comparison reference values are based on the measurements carried out by NMIA, NIST, NRC, PTB, BEV, SP, and VNIIM. The combined standard uncertainty, , of u_{R} is the standard uncertainty of the weighted average (see equation 2 on page 11 of the Final Report).x_{R}For 10 mA and 10 Hz, x_{R} = 2.6 µA/A and 2u_{R} = 0.9 µA/A |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from equations 4, 5 and 6 on page 11 of the CCEM-K12 Final Report.U_{i} |

**Key comparison SIM.EM-K1****2**

INTI, NIST and NRC acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in chapter 12 of the SIM.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables XIV and XV of the SIM.EM-K12 Final Report.U_{i} |

**Key comparison EURAMET****.EM-K1****2**

BEV, JV, NPL, PTB and SP acted as linking laboratories to the key comparison reference value of the CCEM-K12 comparison. The linking process is described in Section 6 (p. 10) of the EURAMET.EM-K12 Final Report.x_{R} |

, and its expanded uncertainty (D = _{i}x - _{i}x_{R}k = 2) obtained from Tables 5 and 6 of the EURAMET.EM-K12 Final Report.U_{i} |

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 Hz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 Hz**

*The measured AC-DC differences at 10 mA are reported in Table V (p. 9) in the SIM.EM-K12 Final Report.*

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 Hz**

*The measured AC-DC differences at 10 mA are reported in Table 3 (p. 12) in the EURAMET.EM-K12 Final Report.*

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 55 Hz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 55 Hz**

*The measured AC-DC differences at 10 mA are reported in Table V (p. 9) in the SIM.EM-K12 Final Report.*

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 55 Hz**

*The measured AC-DC differences at 10 mA are reported in Table 3 (p. 12) in the EURAMET.EM-K12 Final Report.*

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 1 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 1 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 1 kHz**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 10 kHz**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 20 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 20 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 20 kHz**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 50 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 50 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 50 kHz**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 100 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 100 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 10 mA
FREQUENCY : 100 kHz**

**CCEM-K12, SIM.EM-K12 and EURAMET.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 Hz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 Hz**

*The measured AC-DC differences at 5 A are reported in Table VI (p. 13) in the SIM.EM-K12 Final Report.*

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 Hz**

*The measured AC-DC differences at 5 A are reported in Table 4 (p. 12) in the EURAMET.EM-K12 Final Report.*

**CCEM-K12 and SIM.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 55 Hz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 55 Hz**

*The measured AC-DC differences at 5 A are reported in Table VI (p. 13) in the SIM.EM-K12 Final Report.*

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 55 Hz**

*The measured AC-DC differences at 5 A are reported in Table 4 (p. 12) in the EURAMET.EM-K12 Final Report.*

**CCEM-K12 and SIM.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 1 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 1 kHz**

*The measured AC-DC differences at 5 A are reported in Table VI (p. 13) in the SIM.EM-K12 Final Report.*

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 1 kHz**

*The measured AC-DC differences at 5 A are reported in Table 4 (p. 12) in the EURAMET.EM-K12 Final Report.*

**CCEM-K12 and SIM.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 10 kHz**

**CCEM-K12 and SIM.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 20 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 20 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 20 kHz**

**CCEM-K12 and SIM.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 50 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 50 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 50 kHz**

**CCEM-K12 and SIM.EM-K12**

**Key comparison CCEM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 100 kHz**

** x_{i}** : AC-DC difference reported by Laboratory

U

**Key comparison SIM.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 100 kHz**

**Key comparison EURAMET.EM-K12**

**MEASURAND : AC-DC current transfer difference
CURRENT : 5 A
FREQUENCY : 100 kHz**