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The BIPM key comparison database
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METROLOGY AREA
Mass
Length (9)
Electricity and Magnetism (6)
Thermometry (5)
Amount of Substance (4)
Photometry and Radiometry (2)
TYPE
Key comparisons (20)
Supplementary comparisons (6)
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Approved for equivalence (15)
Approved and published (3)
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Protocol complete (2)
Ongoing, approved for equivalence (1)
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ORGANISATIONS
APMP (24)
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AFRIMETS (SADCMET expansion) (1)
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Your query 'Viet Nam' produced 26 results New search
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  APMP.T- K4.2 Comparison of local realizations of aluminium (Al) freezing-point temperature
2018 - 2019
Comparison type, Field   Key comparison in Thermometry, Fixed Point Cells
Status   Planned
  APMP.EM- K6.a Comparison of AC/DC voltage transfer standards
2000 - 2003
Comparison type, Field   Key comparison in Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Parameter(s)   Voltage: 3 V
Frequency: 1 kHz, 20 kHz, 100 kHz and 1 MHz
Status   Approved for equivalence, Results available
  APMP.L- K1 Gauge blocks by interferometry
2001 - 2002
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Status   Approved for equivalence, Results available
  APMP.EM.RF- S2 Comparison of RF power
1995 - 1998
Comparison type, Field   Supplementary comparison in Electricity and Magnetism, Radio frequencies
Parameter(s)   Frequency: 100 MHz, 1 GHz, 12 GHz and 17 GHz
Status   Published
  APMP.EM- K9 AC/DC transfer difference at higher voltage
2000 - 2004
Comparison type, Field   Key comparison in Electricity and Magnetism, AC Voltage, Current, Power, and AC/DC Transfer
Parameter(s)   Voltage: 500 V and 1000 V
Frequency: 1 kHz, 10 kHz, 20 kHz, 50 kHz and 100 kHz
Status   Approved for equivalence, Results available
  APMP.L- K1.1 Gauge blocks by interferometry
2005 - 2006
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Status   Approved for equivalence, Results available
  APMP.L- K4 Diameter standards
2008 - 2010
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Internal and external diameters
Status   Approved for equivalence, Results available
  APMP.L- K11.1 Comparison of primary wavelength standards
2007
Comparison type, Field   Key comparison in Length, Laser Frequencies
633 nm
Status   Approved for equivalence, Results available
  APMP.T- K3.1 Realizations of the ITS-90 from 234.3 K to 692.7 K
2008
Comparison type, Field   Key comparison in Thermometry, Standard Platinum Resistance Thermometers
Status   Approved for equivalence, Results available
  APMP.QM- K9 pH measurement of phosphate buffer solutions
2009 - 2010
Comparison type, Field   Key comparison in Amount of Substance, Electrochemistry
pH ~ 6.86
Parameter(s)   Temperature: 15 °C, 25 °C and 37 °C
Status   Approved for equivalence, Results available
  APMP.L- S3 Gauge block by mechanical comparison
2006 - 2009
Comparison type, Field   Supplementary comparison in Length, Dimensional Metrology
Status   Approved and published
  APMP.EM- S8 Comparison on digital multimeter
2011 - 2013
Comparison type, Field   Supplementary comparison in Electricity and Magnetism, DC Voltage and Current
Status   Protocol complete
  APMP.T- S3 Comparison of industrial thermometers
2004
Comparison type, Field   Supplementary comparison in Thermometry, Industrial thermometry
Temperature: -40 °C to 250 °C
Status   Approved and published
  CCL- K11 Comparison of optical frequency and wavelength standards
2008 -
Comparison type, Field   Key comparison in Length, Laser Frequencies
Status   Ongoing, approved for equivalence, Results available
  APMP.T- S6 Comparison of Industrial Platinum Resistance Thermometers (IPRT)
2009
Comparison type, Field   Supplementary comparison in Thermometry, Industrial thermometry
Temperature: -50 °C to 400 °C
Status   Approved and published
  APMP.QM- K19 pH measurement of borate buffer solutions
2013
Comparison type, Field   Key comparison in Amount of Substance, Electrochemistry
Parameter(s)   Temperature: 15 °C, 25 °C and 37 °C
Status   Approved for equivalence, Results available
  APMP.L- K6 Two-dimensional coordinate measuring machine artefacts
2006 - 2008
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Status   Approved for equivalence, Results available
  APMP.L- K8 Calibration of surface roughness standards
2008 - 2010
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Status   Approved for equivalence
  APMP.T- K7.1 Comparison of water triple point cells
2011 - 2012
Comparison type, Field   Key comparison in Thermometry, Fixed Point Cells
Temperature: 273.16 K
Status   Approved for equivalence, Results available
  APMP.L- K7.2014 Calibration of a linescale
2015 - 2017
Comparison type, Field   Key comparison in Length, Dimensional Metrology
Status   Report in progress, Draft B