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
**CCM.P-K2, EURAMET.M.P-K4.2010 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 10 kPa

**CCM.P-K2**

Degrees of equivalence represented by* D _{i}* = (

**EURAMET.M.P-K4.2010 and APMP.M.P-K9**

Degrees of equivalence represented by *D _{i}* = (

**CCM.P-K2 and EURAMET.M.P-K8**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 20 kPa

Degrees of equivalence represented by* D _{i}* = (

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE ** 30 kPa

**CCM.P-K2**

Degrees of equivalence represented by* D _{i}* = (

**APMP.M.P-K9**

Degrees of equivalence represented by *D _{i}* = (

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 40 kPa

* D _{i}* = (

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 50 kPa

**CCM.P-K2 and EURAMET.M.P-K8**

* D _{i}* = (

**APMP.M.P-K9**

Degrees of equivalence represented by *D _{i}*

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 60 kPa

* D _{i}* = (

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 70 kPa

**CCM.P-K2 and EURAMET.M.P-K8**

* D _{i}* = (

**APMP.M.P-K9**

Degrees of equivalence represented by *D _{i}*

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 80 kPa

* D _{i}* = (

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE** 90 kPa

**CCM.P-K2**

* D _{i}* = (

**APMP.M.P-K9**

Degrees of equivalence represented by *D _{i}*

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 100 kPa

**CCM.P-K2 and EURAMET.M.P-K8**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE ** 110 kPa

**CCM.P-K2**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 120 kPa

* D _{i}* = (

**CCM.P-K2, EURAMET.M.P-K4.2010 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 10 kPa

**CCM.P-K2**

* D _{i}* = (

**EURAMET.M.P-K4.2010 and APMP.M.P-K9**

*D _{i}*

**CCM.P-K2 and EURAMET.M.P-K8**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 20 kPa

* D _{i}* = (

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE ** 30 kPa

**CCM.P-K2**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 40 kPa

* D _{i}* = (

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 50 kPa

**CCM.P-K2 and EURAMET.M.P-K8**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 60 kPa

* D _{i}* = (

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 70 kPa

**CCM.P-K2 and EURAMET.M.P-K8**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 80 kPa

* D _{i}* = (

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE** 90 kPa

**CCM.P-K2**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 100 kPa

**CCM.P-K2 and EURAMET.M.P-K8**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE ** 110 kPa

**CCM.P-K2**

* D _{i}* = (

**APMP.M.P-K9**

*D _{i}*

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 120 kPa

* D _{i}* = (

AFRIMETS.M.P-S2

Metrology area, Sub-field | Mass and related quantities, Pressure |

Description | Pressure meaurements (Absolute mode) |

Time of measurements | 2017 - 2022 |

Status | Measurements in progress |

Measurand | Absolute Pressure 10 kPa, 30 kPa, 50 kPa, 70 kPa, 90 kPa, 100 kPa and 110 kPa |

Transfer device | Fluke RPM-4 reference pressure monitor |

Comparison type | Supplementary Comparison |

Consultative Committee | CCM (Consultative Committee for Mass and Related Quantities) |

Conducted by | AFRIMETS (Intra-Africa Metrology System) |

RMO Internal Identifier | AFRIMETS.M.P-S1 |

Comments | This supplementary inter laboratory comparison is a replacement of AFRIMETS.M.P-K2 which was abandoned. |

Pilot institute |
NMISA
National Metrology Institute of South Africa South Africa |

Contact person | Brian YALISI +27728506346 |

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

NMISA |
National Metrology Institute of South Africa, South Africa, AFRIMETS |

KEBS |
Kenya Bureau of Standards, Kenya, AFRIMETS |

LPEE-LNM |
Laboratoire National de Métrologie du Laboratoire Public d'Essais et d'Études, Morocco, AFRIMETS |

NIS |
National Institute for Standards, Egypt, AFRIMETS |

PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |

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Results:

**CCM.P-K2, EURAMET.M.P-K4.2010 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 10 kPa

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

The degree of equivalence of laboratory* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

The degree of equivalence between two laboratories * i* and

**Linking EURAMET.M.P-K4.2010 to CCM.P-K2**

PTB provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K4.2010, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K4.2010 Final Report.

The degrees of equivalence of the laboratories having participated in EURAMET.M.P-K4.2010, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

**Linking APMP.M.P-K9 to CCM.P-K2**

NMIA and PTB provides the link between key comparisons CCM.P-K2 and APMP.M.P-K9, having participated in both comparisons. The linkage process is described in Section 6 of the APMP.M.P-K9 Final Report.

The degrees of equivalence of the laboratories having participated in APMP.M.P-K9, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

**CCM.P-K2 and EURAMET.M.P-K8**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 20 kPa

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

The degree of equivalence of laboratory* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

The degree of equivalence between two laboratories * i* and

**Linking EURAMET.M.P-K8 to CCM.P-K2**

PTB and INRiM provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K8, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The degrees of equivalence of the laboratories having participated in EURAMET.M.P-K4.2010, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 30 kPa

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

The degree of equivalence of laboratory* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

The degree of equivalence between two laboratories * i* and

**Linking APMP.M.P-K9 to CCM.P-K2**

NMIA and PTB provides the link between key comparisons CCM.P-K2 and APMP.M.P-K9, having participated in both comparisons. The linkage process is described in Section 6 of the APMP.M.P-K9 Final Report.

The degrees of equivalence of the laboratories having participated in APMP.M.P-K9, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 40 kPa

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 50 kPa

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**Linking EURAMET.M.P-K8 to CCM.P-K2**

PTB and INRiM provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K8, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

The degrees of equivalence of the laboratories having participated in EURAMET.M.P-K4.2010, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

**Linking APMP.M.P-K9 to CCM.P-K2**

NMIA and PTB provides the link between key comparisons CCM.P-K2 and APMP.M.P-K9, having participated in both comparisons. The linkage process is described in Section 6 of the APMP.M.P-K9 Final Report.

The degrees of equivalence of the laboratories having participated in APMP.M.P-K9, with respect to the CCM.P-K2 key comparison reference value, are expressed in Pa, and therefore are shown on a different graph from the one for the participants in CCM.P-K2.

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 60 kPa

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 70 kPa

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**Linking EURAMET.M.P-K8 to CCM.P-K2**

PTB and INRiM provides the link between key comparisons CCM.P-K2 and EURAMET.M.P-K8, having participated in both comparisons. The linkage process is described in Section 11 of the EURAMET.M.P-K8 Final Report.

**Linking APMP.M.P-K9 to CCM.P-K2**

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 80 kPa

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE** 90 kPa

**CCM.P-K2**

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

*x*_{R} = 335.744 8 mm^{2}

*u*_{R} = 0.000 9 mm^{2}

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**Linking APMP.M.P-K9 to CCM.P-K2**

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 100 kPa

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**Linking EURAMET.M.P-K8 to CCM.P-K2**

**Linking APMP.M.P-K9 to CCM.P-K2**

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE ** 110 kPa

**CCM.P-K2**

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* **x*_{R} = 335.744 3 mm^{2}

*u*_{R} = 0.001 0 mm^{2}

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**Linking APMP.M.P-K9 to CCM.P-K2**

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 120 kPa

The key comparison reference value, ** x_{R}**, is calculated as the median of the participants' values. The standard uncertainty of the key comparison reference value,

* i* with respect to the key comparison reference value is given by a pair of terms expressed in mm

** D_{i} = (x_{i} - x_{R})** and

* i* and

**CCM.P-K2, EURAMET.M.P-K4.2010 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 10 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2 and EURAMET.M.P-K8**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 20 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE ** 30 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 40 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 50 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 60 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 70 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 80 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE** 90 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2, EURAMET.M.P-K8 and APMP.M.P-K9**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE** 100 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2 and APMP.M.P-K9**

**MEASURAND** Effective area of a piston-cylinder assembly

**NOMINAL VALUE** 335.7 mm2

**NOMINAL PRESSURE ** 110 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}

**CCM.P-K2**

**MEASURAND ** Effective area of a piston-cylinder assembly

**NOMINAL VALUE ** 335.7 mm^{2}

**NOMINAL PRESSURE ** 120 kPa

*x*_{i} results obtained by laboratory *i*,**Lab _{i}**

*u*_{i} combined standard uncertainty of *x*_{i}