Comparison
Comparison close
Results

BIPM.EM-K13 and SIM.EM-K1

 

MEASURAND               Resistance

NOMINAL VALUE       1 Ω

 

Degrees of equivalence represented by Di = (xI - xR) / 1, for which (xI - x) and 1 are expressed in Ω, and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-8.

1 Ω
Di / 10-8
Participating institutes

(a) Institute using a quantum Hall resistance standard 

(b) Measurements traceable to a calculable capacitor

Only the most recent comparison of the series of bilaterals conducted in the framework of BIPM.EM-K13 is retained.

BIPM.EM-K13

 

MEASURAND               Resistance

NOMINAL VALUE       10 kΩ

 

Degrees of equivalence represented by Di = (xI - xR) / 104, for which (xI - x) and 104 are expressed in Ω, and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-8.

10 kΩ
Di / 10-8
Participating institutes

(a) Institute using a quantum Hall resistance standard 

Only the most recent comparison of the series of bilaterals conducted in the framework of BIPM.EM-K13 is retained.

Comparison
Comparison close
Results

BIPM.EM-K13 and SIM.EM-K1

 

MEASURAND               Resistance

NOMINAL VALUE       1 Ω

 

Degrees of equivalence represented by Di = (xI - xR) / 1, for which (xI - x) and 1 are expressed in Ω, and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-8.

LABi Di Uneg,i Upos,i
10-8
10-8
10-8
CEM (a) -8.0 18.0
JV 2.7 12.4
INPL 18.0 30.0
KRISS (a) 3.1 8.4
INM(RO) 7.0 26.0
NIST (a) -1.4 4.2
NMIA (b) -13.2 22.8
GUM (a) -6.2 8.6
NPLI 16.0 52.0
BIM -18.4 17.2
NIMT -7.1 19.1
CMI (a) 0.3 4.6
SMD -5.0 8.2
NMISA -12.3 12.0
NIM (a) 1.0 3.4
NMC A*STAR (a) -1.2 6.4
EMI -5.7 40.0
NSAI NML -8.1 9.0
INMETRO (a) 1.0 6.8
INTI -8.8 10.2
UTE 5.2 117.6
NRC -1.4 4.6
CENAM 16.5 19.4
Participating institutes
BIPM.EM-K13
SIM.EM-K1

(a) Institute using a quantum Hall resistance standard 

(b) Measurements traceable to a calculable capacitor

Only the most recent comparison of the series of bilaterals conducted in the framework of BIPM.EM-K13 is retained.

BIPM.EM-K13

 

MEASURAND               Resistance

NOMINAL VALUE       10 kΩ

 

Degrees of equivalence represented by Di = (xI - xR) / 104, for which (xI - x) and 104 are expressed in Ω, and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-8.

LABi Di Uneg,i Upos,i
10-8
10-8
10-8
CEM (a) -2.0 4.0
JV 1.2 13.4
INPL -83 118
EIM (a) 7.3 7.0
INM(RO) -9.0 18
GUM (a) -3.7 6.8
KRISS (a) -0.1 3.2
NPLI 13 28
BIM 0.6 30
NIMT (a) -31 74
CMI (a) -1.8 3.4
SMD 0.4 6.8
NMISA 52 60
NIM (a) -0.1 3.2
NMC A*STAR (a) 1.6 3.6
EMI 1.7 19
NSAI NML 6.9 42
INMETRO (a) 2.6 3.6
Participating institutes
BIPM.EM-K13

(a) Institute using a quantum Hall resistance standard 

Only the most recent comparison of the series of bilaterals conducted in the framework of BIPM.EM-K13 is retained.

Comparison
Comparison close
BIPM comparison
Linked comparison
BIPM.EM-K13
Metrology area, Sub-field Electricity and Magnetism, Resistance
Description Resistance standards
Time of measurements 1993 -
Status Continuous, approved for equivalence
References

BIPM.EM-K13 Technical Protocol

Measurand Resistance
1 Ω and 10 kΩ
Transfer device Wirewound resistors
Comparison type Key Comparison
Consultative Committee CCEM (Consultative Committee for Electricity and Magnetism)
Conducted by BIPM (Bureau International des Poids et Mesures)
Comments Most recent update of BIPM.EM-K13 results: 4 March 2022
From 22 September 2021, BIPM.EM-K13 covers the two former comparisons BIPM.EM-K13.a and BIPM.EM-K13.b.
Pilot institute BIPM
Bureau International des Poids et Mesures
BIPM - International Organization
Contact person Benjamin Rolland

+33 01 45 07 62 81
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
BIPM

Bureau International des Poids et Mesures, BIPM - International Organization, N/A

BEV

Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET

BIM

Bulgarian Institute of Metrology, Bulgaria, EURAMET

CEM

Centro Español de Metrologia, Spain, EURAMET

CMI

Czech Metrology Institute, Czechia, EURAMET

EIM

Hellenic Institute of Metrology, Greece, EURAMET

EMI

Emirates Metrology Institute, United Arab Emirates, GULFMET

GUM

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

INM

National Institute of Metrology, Romania, EURAMET

INMETRO

Instituto Nacional de Metrologia, Qualidade e Tecnologia, Brazil, SIM

INPL

National Physical Laboratory of Israel, Israel, N/A

IPQ

Instituto Portugues da Qualidade, Portugal, EURAMET

JV

Justervesenet, Norway, EURAMET

KRISS

Korea Research Institute of Standards and Science, Korea, Republic of, APMP

NIM

National Institute of Metrology, China, APMP

NIMT

National Institute of Metrology (Thailand), Thailand, APMP

NIST

National Institute of Standards and Technology, United States, SIM

NMC, A*STAR

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

NMIA

National Measurement Institute, Australia, Australia, APMP

NMISA

National Metrology Institute of South Africa, South Africa, AFRIMETS

NPLI

CSIR National Physical Laboratory of India, India, APMP

NSAI NML

NSAI National Metrology Laboratory, Ireland, EURAMET

SMD

Service de la Métrologie Belge, Belgium, EURAMET

Comparison
Comparison close
Results

BIPM.EM-K13 and SIM.EM-K1

 

MEASURAND               Resistance

NOMINAL VALUE       1 Ω

 

The key comparison reference value xR is the BIPM value. Its standard uncertainty is evaluated to be uR = 1.5x10-8 and is included in ui .
For laboratories that base their measurements on a calculable capacitor, the uncertainty associated with the use of RK-90, 1 × 10-7, needs to be included in the ui. This is a consequence of the use of the QHR reference at BIPM. Further details can be found here.

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi and its expanded uncertainty (k = 2), Ui = 2ui, both expressed in 10-8.

The degree of equivalence between two laboratories i and j may be calculated,  taking into account the correlation introduced by the BIPM measurements.

 

Linking SIM.EM-K1 to BIPM.EM-K13

The linkage of SIM.EM-K1 results to those of BIPM.EM-K13 is ensured by NIST who participated in both comparisons. The detailed calculation of the linkage is explained in Appendix G of the SIM.EM-K1 Final Report.

BIPM.EM-K13

 

MEASURAND               Resistance

NOMINAL VALUE       10 kΩ

 

The key comparison reference value xR is the BIPM value. Its standard uncertainty is evaluated to be uR = 1.5x10-8 and is included in ui .

 

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi and its expanded uncertainty (k = 2), Ui = 2ui, both expressed in 10-8.

The degree of equivalence between two laboratories i and j may be calculated,  taking into account the correlation introduced by the BIPM measurements.

Comparison
Comparison close
Results

BIPM.EM-K13 and SIM.EM-K1

 

MEASURAND               Resistance

NOMINAL VALUE       1 Ω

 

BIPM.EM-K13

 

xi : relative difference between the result of measurement of laboratory i and that of the BIPM
ui : combined standard uncertainty of xi

(a) Institute using a quantum Hall resistance standard 

(b) Measurements traceable to a calculable capacitor

BIPM.EM-K13

 

MEASURAND               Resistance

NOMINAL VALUE       10 kΩ

 

xi : relative difference between the result of measurement of laboratory i and that of the BIPM
ui : combined standard uncertainty of xi

 

(a) Institute using a quantum Hall resistance standard