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
**CCAUV.V-K3, AFRIMETS.AUV.V-K3, APMP.AUV.V-K3 and EURAMET.AUV.V-K3**

**DEVICE : Low-frequency vibration transfer standard
MEASURAND : Magnitude
FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz**

**Selected graphs of equivalence for eight of the frequency values**

**DEVICE : Low-frequency vibration transfer standard
MEASURAND : Phase
FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz**

**Selected graphs of equivalence for eight of the frequency values**

**CCAUV.V-K3, AFRIMETS.AUV.V-K3, APMP.AUV.V-K3 and EURAMET.AUV.V-K3**

**DEVICE : Low-frequency vibration transfer standard
MEASURAND : Magnitude
FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz**

**Degrees of equivalence: D_{i} and U_{i} **

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

**DEVICE : Low-frequency vibration transfer standard
MEASURAND : Phase
FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz**

**Degrees of equivalence: D_{i} and U_{i} **

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

EURAMET.AUV.V-K3.1

Metrology area, Sub-field | Acoustics, Ultrasound, Vibration, Vibration |

Description | Calibration of accelerometers at low frequencies |

Time of measurements | 2021 - 2022 |

Status | Abandoned |

References | |

Measurand | Magnitude and phase of complex voltage sensitivity |

Parameters | Covered frequencies (Hz) 0.2, 0.25, 0.315, 0.4, 0.5, 0.63, 0.8, 1, 1.25, 1.6, 2, 2.5, 3.15, 4, 5, 6.3, 8.0, 10, 12.5, 16, 20, 25, 31.5, 40. |

Transfer device | Capacitive accelerometer |

Comparison type | Key Comparison |

Consultative Committee | CCAUV (Consultative Committee for Acoustics, Ultrasound and Vibration) |

Conducted by | EURAMET (European Association of National Metrology Institutes) |

RMO Internal Identifier | EURAMET 1542 |

Comments | During the measurement phase it was found out that measurement set-up at METAS is compatible with cables and connectors of travelling standard. Therefore to avoid incorrect results for measurements performed by METAS it was decided to terminate the comparison. |

Pilot institute |
UME
TÜBITAK Ulusal Metroloji Enstitüsü Türkiye |

Contact person | Enver Sadikoglu 902626795000 |

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:

**CCAUV.V-K3, AFRIMETS.AUV.V-K3, APMP.AUV.V-K3 and EURAMET.AUV.V-K3**

**DEVICE : Low-frequency vibration transfer standard
MEASURAND : Magnitude
FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz**

**CCAUV.V-K3**

The computation of the key comparison reference value at each frequency, ** x_{R,M}**, and of its expanded uncertainty,

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: where D_{i}, and its expanded uncertainty D = _{i}x - x_{i}_{R,M} (U_{i}k = 2), computed as explained in Section 8 of the Final Report. |

Pair-wise degrees of equivalence may be calculated taking into account possible correlations. |

**Linking of APMP.AUV.V-K3 to CCAUV.V-K3**

The linking was made via NIM, NMIA, NMISA, KRISS and NMIJ/AIST, having participated in both comparisons.

**Linking of AFRIMETS.AUV.V-K3 to CCAUV.V-K3**

The linking was made via NMISA, having participated in both comparisons.

**Linking of EURAMET.AUV.V-K3 to CCAUV.V-K3**

The linking was made via BKSV-DPLA, GUM, LNE, METAS and PTB, having participated in both comparisons.

**DEVICE : Low-frequency vibration transfer standard
MEASURAND : Phase
FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz**

The computation of the key comparison reference value at each frequency, ** x_{R,P}**, and of its expanded uncertainty,

The degree of equivalence of laboratory i with respect to the key comparison reference value is given by a pair of terms: where D_{i}, and its expanded uncertainty D = _{i}x - x_{i}_{R,P} (U_{i}k = 2), computed as explained in Section 8 of the Final Report. |

Pair-wise degrees of equivalence may be calculated taking into account possible correlations. |

**CCAUV.V-K3, AFRIMETS.AUV.V-K3, APMP.AUV.V-K3 and EURAMET.AUV.V-K3**

**DEVICE : Low-frequency vibration transfer standard**

**MEASURAND : Magnitude
FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz**

**CCAUV.V-K3**

The laboratories' individual measurement may be found in Sections 7.1 and 7.2 of the CCAUV.V-K3 Final Report.

**AFRIMETS.AUV.V-K3**

The laboratories' individual measurement may be found in Section 7 of the AFRIMETS.AUV.V-K3 Final Report.

**APMP.AUV.V-K3**

The laboratories' individual measurement may be found in Section 9 of the APMP.AUV.V-K3 Final Report.

**EURAMET.AUV.V-K3**

The laboratories' individual measurement may be found in Section 7 of the EURAMET.AUV.V-K3 Final Report.

MEASURAND : Phase

FREQUENCIES : 0.1 Hz, 0.125 Hz, 0.16 Hz, 0.2 Hz, 0.25 Hz, 0.315 Hz, 0.4 Hz, 0.5 Hz, 0.63 Hz, 0.8 Hz, 1 Hz, 1.25 Hz, 1.60 Hz, 2 Hz, 2.5 Hz, 3.15 Hz, 4 Hz, 5 Hz, 6.3 Hz, 8 Hz, 10 Hz, 12.5 Hz, 16 Hz, 20 Hz, 25 Hz, 31.5 Hz, 40 Hz

The laboratories' individual measurement may be found in Sections 7.1 and 7.2 of the Final Report.