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BIPM.EM-K10.b
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BIPM.EM-K10.b
Results
Laboratory individual
measurements

Equivalence
statements

Degrees
of equivalence

Graph(s)
of equivalence

BIPM.EM-K10.b, SIM.EM.BIPM-K10.b, SIM.EM.BIPM-K10.b.1, and COOMET.EM.BIPM-K10.b

  • Key comparison BIPM.EM-K10.b

MEASURAND : DC voltage, Josephson standards
NOMINAL VALUE : 10 V

xi : result of measurement carried out by laboratory i expressed as the difference from the BIPM value
ui : combined standard uncertainty of xi

 Lab i xi
/ nV
ui
/ nV
Date of measurement
       
 LNE 1.2 1.2 May 1994
 PTB -0.3 0.5 Jan 1998
 SP 1.4 1.2 Jan 1998
 SMU 14 11 May 1999
 NPL

-1.5

2.2

Sep 2004

 NRC

2.8

3.1

Oct 2004

 CEM

0.4

1.5

Sep 2005

 NMIJ

-1.2

1.3

Oct 2005

 BEV

1.1

3.5

Nov 2005

 INETI

0.8

4.6

Mar 2006

 INMETRO

19

16

Apr 2006

 NMIA

0.9

1.7

May 2006

 VSL

-1.5

1.8

Oct 2006

 KRISS

1.7

1.3

Feb 2008

 LNE (1)

-4.3

1.5

Dec 2007

 LNE (2)

-0.1

0.1

Dec 2007

 NIST (1)

1.5

1.4

Mar 2009

 NIST (2)

-0.8

1.0

Mar 2009

 SMD (1)

0.3

3.3

Nov 2009

 SMD (2)

-0.4

1.3

Nov 2009

 EIM (1)

11.0

17.1

Mar 2010

 EIM (2)

-0.6

2.0

Mar 2010

 A*STAR (1)

-39.0

6.3

Sep 2010

 A*STAR (2)

0.4

1.0

Sep 2010

 VNIIM (1)

1.1

2.9

Nov 2010

 VNIIM (2)

-0.1

2.0

Nov 2010

 CMI (1)

14.1

11.1

Feb 2011

 CMI (2)

9.6

10.3

Feb 2011

 CENAM (1)

2.5

1.3

Sep 2011

 CENAM (2)

-0.6

0.7

Sep 2011

 METAS

0.3

1.0

Jan 2012

 MSL (1)

-2.9

6.4

Apr 2011

 MSL (2)

2.5

4.0

Apr 2011

 NIM (1) 0.9 3.3 Nov 2013
 NIM (2) -0.2 0.9 Nov 2013
 INM(RO) 3.3 2.6 Jun 2014
 PTB (1) -1.9 1.7 Oct 2014
 PTB (2) 0.7 0.5 Oct 2014
 DMDM (1) -2.6 2.7 Jun 2015
 DMDM (1) -0.1 1.5 Jun 2015
 NIMT (1) -2.4 2.9 Nov 2015
 NIMT (2) -1.0 2.6 Nov 2015

(1) initial result
(2) final result following technical improvements during the comparison

  • Key comparison SIM.EM.BIPM-K10.b

MEASURAND : DC voltage, Josephson standards
NOMINAL VALUE : 10 V


SIM.EM.BIPM-K10.b is a bilateral key comparison between NIST and NRC conducted from August 13 to August 17, 2007.

dNIST-NRC : reported difference between NIST CJVS (Compact Josephson Voltage Standard) and NRC JVS
UNIST-NRC : expanded uncertainty (k = 2) of dNIST-NRC

dNIST-NRC = -0.28 nV
UNIST-NRC = 2.07 nV

  • Key comparison SIM.EM.BIPM-K10.b.1

MEASURAND : DC voltage, Josephson standards
NOMINAL VALUE : 10 V


SIM.EM.BIPM-K10.b.1 is a bilateral key comparison between INMETRO and NIST conducted in June 2009.

dINMETRO-NIST : reported difference between INMETRO JVS and NIST CJVS
uINMETRO-NIST : combined standard uncertainty of dINMETRO-NIST

dINMETRO-NIST = 0.54 nV
uINMETRO-NIST = 1.48 nV

  • Key comparison COOMET.EM.BIPM-K10.b

MEASURAND : DC voltage, Josephson standards
NOMINAL VALUE : 10 V


COOMET.EM.BIPM-K10.b is a bilateral key comparison between VNIIM and BelGIM conducted from September 4 to August 8, 2014.

dBelGIM-VNIIM : reported difference between BelGIM JVS (Josephson Voltage Standard) and VNIIM JVS, obtained using a transportable JVS
UBelGIM-VNIIM : expanded uncertainty (k = 2) of dBelGIM-VNIIM

dBelGIM-VNIIM = 0.99 nV
UBelGIM-VNIIM = 3.0 nV


Unless otherwise stated, in the final numbers presented here, rounding has been applied according to ISO 80000-1:2009 Annex B Rule B.