CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 40 Hz
Transfer device: Back-to-back accelerometer type 8305

Degrees of equivalence Di and expanded uncertainty (k = 2) Ui, both expressed in pC/(m/s2)x10-4

Click on the graph to get a closer view and the names of the laboratories


Red diamonds : participants in CCAUV.V-K1 (2000 - 2001)
Pink diamonds : participants in CCAUV.V-K1.1 only (2006 - 2007)
Blue squares : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Orange circles : participants in EUROMET.AUV.V-K1.1 (2006)
Purple circles : participants in APMP.AUV.V-K1.2 (2009)

CCAUV.V-K1, CCAUV.V-K1, APMP.AUV.V-K1, EUROMET.AUV.V-K1, SIM.AUV.V-K1, EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 160 Hz
Transfer device: Back-to-back accelerometer type 8305

Degrees of equivalence Di and expanded uncertainty (k = 2) Ui, both expressed in pC/(m/s2)x10-4

Click on the graph to get a closer view and the names of the laboratories

Red diamonds : participants in CCAUV.V-K1 (2000 - 2001)
Pink diamonds : participants in CCAUV.V-K1.1 only (2006 - 2007)
Green triangles : participants in APMP.AUV.V-K1 only (1996 - 1997)
Blue squares : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Black circles : participants in SIM.AUV.V-K1 only (1997 - 1999)
Orange circles : participants in EUROMET.AUV.V-K1.1 (2006)
Purple circles : participants in APMP.AUV.V-K1.2 (2009)

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 160 Hz
Transfer device: Single-ended accelerometer type 8305

Degrees of equivalence Di and expanded uncertainty (k = 2) Ui, both expressed in pC/(m/s2)x10-4

Click on the graph to get a closer view and the names of the laboratories


Red diamonds : participants in CCAUV.V-K1 (2000 - 2001)
Pink diamonds : participants in CCAUV.V-K1.1 only (2006 - 2007)
Blue squares : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Orange circles : participants in EUROMET.AUV.V-K1.1 (2006)
Purple circles : participants in APMP.AUV.V-K1.2 (2009)

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 5 kHz
Transfer device: Back-to-back accelerometer type 8305

Degrees of equivalence Di and expanded uncertainty (k = 2) Ui, both expressed in pC/(m/s2)x10-4

Click on the graph to get a closer view and the names of the laboratories

Red diamonds : participants in CCAUV.V-K1 (2000 - 2001)
Pink diamonds : participants in CCAUV.V-K1.1 only (2006 - 2007)
Blue squares : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Orange circles : participants in EUROMET.AUV.V-K1.1 (2006)
Purple circles : participants in APMP.AUV.V-K1.2 (2009)

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : from 40 Hz to 5 kHz
Transfer device : Back-to-back accelerometer type 8305

Degrees of equivalence relative to the key comparison reference value :
Di and expanded uncertainty (k = 2) Ui both expressed in pC/(m/s2)x10-4

Graphs are available for 6 frequency values:
40 Hz, 80 Hz, 160 Hz, 800 Hz, 2 kHz and 5 kHz

Frequency: 40 Hz


Frequency: 80 Hz

Frequency: 160 Hz
Click on the Graph to get a closer view and the names of the laboratories

Frequency: 800 Hz

Frequency: 2 kHz

Frequency: 5 kHz

Red diamonds : participants in CCAUV.V-K1 (2000 - 2001)
Pink diamonds : participants in CCAUV.V-K1.1 only (2006 - 2007)
Green triangles : participants in APMP.AUV.V-K1 only (1996 - 1997)
Blue squares : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Black circles : participants in SIM.AUV.V-K1 only (1997 - 1999)
Orange circles : participants in EUROMET.AUV.V-K1.1 (2006)
Purple circles : participants in APMP.AUV.V-K1.2 (2009)

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : from 40 Hz to 5 kHz
Transfer device : Single-ended accelerometer type 8305 WH 2335

Degrees of equivalence relative to the key comparison reference value :
Di and expanded uncertainty (k = 2) Ui both expressed in pC/(m/s2)x10-4

Graphs are available for 5 frequency values:
40 Hz, 80 Hz, 160 Hz, 800 Hz and 2 kHz

Frequency: 40 Hz

Frequency: 80 Hz

Frequency: 160 Hz


Frequency: 800 Hz

Frequency: 2000 Hz

Red diamonds : participants in CCAUV.V-K1 (2000 - 2001)
Pink diamonds : participants in CCAUV.V-K1.1 only (2006 - 2007)
Blue squares : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Orange circles : participants in EUROMET.AUV.V-K1.1 (2006)
Purple circles : participants in APMP.AUV.V-K1.2 (2009)

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 40 Hz
Transfer device: Back-to-back accelerometer type 8305

Full set of degrees of equivalence relative to the CCAUV.V-K1 key comparison reference value:

Red : participants in CCAUV.V-K1 (2000 - 2001)
Pink : participants in CCAUV.V-K1.1 only (2006 - 2007)
Blue : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Orange : participants in EUROMET.AUV.V-K1.1 (2006)
Purple : participants in APMP.AUV.V-K1.2 (2009)

The pair-wise degrees of equivalence given in the table below involve participants in CCAUV.V-K1 and CCAUV.V-K1.1 only.

   
Lab iDiUi
   
PTB0.60.8
BNM-CESTA1.26.3
CSIRO-NML1.25.0
CMI-0.95.7
CSIR-NML9.211.4
CENAM-1.76.2
NRC-1.13.7
KRISS-1.14.5
NMIJ-2.95.2
VNIIM-5.45.0
NIST1.23.7
NMi-VSL-0.93.1
NIM*0.36.5
NPLI*1.29.0
INMETRO*0.03.3

* participants in CCAUV.V-K1.1 only

The degrees of equivalence and the pair-wise degrees of equivalence displayed in the table above are expressed in pC/(m/s2)x10-4.

Pair-wise degrees of equivalence involving participants in EUROMET.AUV.V-K1, EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2 are available in Summary Results (PDF file).

CCAUV.V-K1, CCAUV.V-K1.1, APMP.AUV.V-K1, EUROMET.AUV.V-K1, SIM.AUV.V-K1, EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 160 Hz
Transfer device: Back-to-back accelerometer type 8305

Full set of degrees of equivalence relative to the CCAUV.V-K1 key comparison reference value:

Red : participants in CCAUV.V-K1 (2000 - 2001)
Pink : participants in CCAUV.V-K1.1 only (2006 - 2007)
Green : participants in APMP.AUV.V-K1 only (1996 - 1997)
Blue : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Black : participants in SIM.AUV.V-K1 only (1997 - 1999)
Orange : participants in EUROMET.AUV.V-K1.1 (2006)
Purple: participants in APMP.AUV.V-K1.2 (2009)

Matrix of equivalence for CCAUV.V-K1, CCAUV.V-K1.1, APMP.AUV.V-K1, and EUROMET.AUV.V-K1:

   
Lab iDiUi
  
PTB0.10.8
BNM-CESTA0.76.3
CSIRO-NML-0.33.7
CMI-0.35.7
CSIR-NML-0.36.3
CENAM-0.36.3
NRC1.23.6
KRISS-1.44.5
NMIJ-0.35.4
VNIIM1.95.0
NIST-1.33.7
NMi-VSL-0.34.2
NIM*-0.22.8
NPLI*2.49.0
INMETRO*-0.33.3
CMS/ITRI**-4.513.4
NML-SIRIM**0.34.0
GUM***-1.87.7
DPLA***-1.02.9
INRIM***-1.04.5
SP***3.95.2
INETI***-2.05.2
UME***-0.16.4
BEV***-2.67.2
CEM***0.47.7
METAS***-6.68.6

* participants in CCAUV.V-K1.1 only
** participants in APMP.AUV.V-K1 only
*** participants in EUROMET.AUV.V-K1 only

The degrees of equivalence and the pair-wise degrees of equivalence displayed in the table above are expressed in pC/(m/s2)x10-4.

Pair-wise degrees of equivalence involving participants in EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2 are available in the Summary Results for the BB accelerometer at 160 Hz (PDF file).

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 160 Hz
Transfer device: Single-ended accelerometer type 8305

Full set of degrees of equivalence relative to the CCAUV.V-K1 key comparison reference value:

Red : participants in CCAUV.V-K1 (2000 - 2001)
Pink : participants in CCAUV.V-K1.1 only (2006 - 2007)
Blue : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Orange : participants in EUROMET.AUV.V-K1.1 (2006)
Purple : participants in APMP.AUV.V-K1.2 (2009)

The pair-wise degrees of equivalence given in the table below involve participants in CCAUV.V-K1, and CCAUV.V-K1.1 only.

   
Lab iDiUi
   
PTB0.30.9
BNM-CESTA3.16.4
CSIRO-NML-0.93.7
CMI0.15.9
CSIR-NML-2.96.4
CENAM-1.36.4
NRC1.53.6
KRISS-1.94.5
NMIJ-2.15.5
VNIIM-1.75.1
NIST1.13.8
NMi-VSL-0.54.3
NIM*1.82.9
NPLI*3.79.2
INMETRO*1.13.5

* participants in CCAUV.V-K1.1 only

The degrees of equivalence and the pair-wise degrees of equivalence displayed in the table above are expressed in pC/(m/s2)x10-4.

Pair-wise degrees of equivalence involving participants in EUROMET.AUV.V-K1, EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2 are available in Summary Results (PDF file).

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 5kHz
Transfer device: Back-to-back accelerometer type 8305

Full set of degrees of equivalence relative to the CCAUV.V-K1 key comparison reference value:

Red : participants in CCAUV.V-K1 (2000 - 2001)
Pink : participants in CCAUV.V-K1.1 only (2006 - 2007)
Blue : participants in EUROMET.AUV.V-K1 only (2003 - 2004)
Orange : participants in EUROMET.AUV.V-K1.1 (2006)
Purple : participants in APMP.AUV.V-K1.2

The pair-wise degrees of equivalence given in the table below involve participants in CCAUV.V-K1, and CCAUV.V-K1.1 only.

   
Lab iDiUi
   
PTB-0.31.7
BNM-CESTA--
CSIRO-NML1.44.8
CMI-0.27.5
CSIR-NML-1.68.8
CENAM-0.610.2
NRC-0.713.8
KRISS0.95.2
NMIJ-0.617.0
VNIIM13.89.1
NIST-1.615.4
NMi-VSL-0.848.8
NIM*-3.36.6
NPLI*-50.612.5
INMETRO*-2.713.0

* participants in CCAUV.V-K1.1 only

The degrees of equivalence and the pair-wise degrees of equivalence displayed in the table above are expressed in pC/(m/s2)x10-4.

Pair-wise degrees of equivalence involving participants in EUROMET.AUV.V-K1, EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2 are available in Summary Results (PDF file).

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : from 40 Hz to 5 kHz
Transfer device : Back-to-back accelerometer type 8305

Degrees of equivalence relative to the key comparison reference value :
Di and expanded uncertainty (k = 2) Ui both expressed in pC/(m/s2)x10-4

  • Participants in CCAUV-V.K1

BNM-CESTA*: no data, measurement at shifted frequency
VNIIM**: results at frequencies from 1250 Hz to 5000 Hz excluded from the calculation of the key comparison reference value

  • Participants in CCAUV.V-K1.1

  • Participants in EUROMET.AUV.V-K1

  • Participants in EUROMET.AUV.V-K1.1
  • Participants in APMP.AUV.V-K1.2
  • Pair-wise degrees of equivalence are available in Summary Results (PDF file).

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : from 40 Hz to 5 kHz
Transfer device : Single-ended accelerometer type 8305 WH 2335

Degrees of equivalence relative to the key comparison reference value :
Di and expanded uncertainty (k = 2) Ui both expressed in pC/(m/s2)x10-4

  • Participants in CCAUV.V-K1

  • Participants in CCAUV.V-K1.1

  • Participants in EUROMET.AUV.V-K1

  • Participants in EUROMET.AUV.V-K1.1

  • Participants in APMP.AUV.V-K1.2

There are no key comparison reference values and no degrees of equivalence relative to the key comparison reference value for frequencies from 2500 Hz to 5000 Hz.

Pair-wise degrees of equivalence are available in Summary Results (PDF file).

APMP.AUV.V-K1
Metrology area, Sub-field Acoustics, Ultrasound, Vibration, Vibration
Description Vibration acceleration
Time of measurements 1996 - 1997
Status Approved for equivalence
Final Reports of the comparisons
Measurand Amplified charge sensitivity
Parameters Frequency: 10 Hz to 10 kHz
Transfer device Back-to-back standard accelerometer with charge amplifier
Comparison type Key Comparison
Consultative Committee CCAUV (Consultative Committee for Acoustics, Ultrasound and Vibration)
Conducted by APMP (Asia Pacific Metrology Programme)
RMO Internal Identifier APMP-IC-4-95
Comments

APMP.AUV.V-K1 results published on 15 November 2004

Amplified charge sensitivity measurements at about 40 nominal frequencies ranging from 10 Hz to 10 kHz, using a Back-to-back (BB) accelerometer

The APMP.AUV.V-K1 results are given here only at one frequency 160 Hz, and they are linked to those of CCAUV.V-K1, CCAUV.V-K1.1EUROMET.AUV.V-K1SIM.AUV.V-K1EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2.

Pilot institute CMS/ITRI
Center for Measurement Standards/Industrial Technology Research Institute
Chinese Taipei
Contact person S. Chen
ShingChen@itri.org.tw
+886 3 573 2135
Additional
First Name Last Name
wwww@ww.www +356719836 Institute 1 Institute 1 Khmelnitskiy
Pilot laboratory
CMS/ITRI

Center for Measurement Standards/Industrial Technology Research Institute, Chinese Taipei, APMP

CSIRO-NML

Commonwealth Scientific and Industrial Research Organization - National Measurement Laboratory; became National Measurement Institute, Australia, NMIA in 2004, Australia, APMP

KRISS

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

NMIJ AIST

National Metrology Institute of Japan, Japan, APMP

NML-SIRIM

National Metrology Laboratory, SIRIM Berhad (became NMIM), Malaysia, APMP

PTB

Physikalisch-Technische Bundesanstalt, Germany, EURAMET

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 40 Hz
Transfer device : Back-to-back accelerometer type 8305

  • Key comparison CCAUV.V-K1

The key comparison reference value, xR, is computed as the weighted mean of all participant results. Its combined standard uncertainty, uR, is obtained as the standard deviation of the weighted mean.
xR = 0.12658 pC/(m/s2), uR = 0.00005 pC/(m/s2) and uR/xR = 0.04x10-2.

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi - xR, and its expanded uncertainty (k = 2), Ui,
Ui = 2(ui2 - uR2)1/2.

The degree of equivalence between two laboratories i and j is given by a pair of terms:
Dij = Di - Dj = xi - xj and its expanded uncertainty (k = 2), Uij = 2(ui2 + uj2)1/2.

  • Linking CCAUV.V-K1.1 to CCAUV.V-K1

The PTB participated in both comparisons and is used as the linking laboratory. The computation of the linkage is in Section 8.2 on page 78 of the CCAUV.V-K1.1 Final Report.

  • Linking EUROMET.AUV.V-K1 to CCAUV.V-K1

The PTB, BNM-CESTA and CMI participated in both comparisons and were used as linking laboratories, as explained in Appendix A of the EUROMET.AUV.V-K1 Final Report.

  • Linking EUROMET.AUV.V-K1.1 to CCAUV.V-K1

The PTB participated in both comparisons and was used as linking laboratory, as explained in section 8 of the EUROMET.AUV.V-K1.1 Final Report.

  • Linking APMP.AUV.V-K1.2 to CCAUV.V-K1

The NIM participated in both comparisons and was used as linking laboratory, as explained in section 8 of the APMP.AUV.V-K1.2 Final Report.

The linkage processes make it possible to extend the graph of equivalence obtained for CCAUV.V-K1 (Back-to-back accelerometer, frequency 40 Hz) to include results from other key comparisons.

CCAUV.V-K1, CCAUV.V-K1.1, APMP.AUV.V-K1, EUROMET.AUV.V-K1, SIM.AUV.V-K1, EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 160 Hz
Transfer device : Back-to-back accelerometer type 8305

  • Key comparison CCAUV.V-K1
The key comparison reference value, xR, is computed as the weighted mean of all participant results. Its combined standard uncertainty, uR, is obtained as the standard deviation of the weighted mean.
xR = 0.12663 pC/(m/s2), uR = 0.00005 pC/(m/s2) and uR/xR = 0.04x10-2.

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi - xR, and its expanded uncertainty (k = 2), Ui,
Ui = 2(ui2 - uR2)1/2.

The degree of equivalence between two laboratories i and j is given by a pair of terms:
Dij = Di - Dj = xi - xj and its expanded uncertainty (k = 2), Uij = 2(ui2 + uj2)1/2.

  • Linking CCAUV.V-K1.1 to CCAUV.V-K1

The PTB participated in both comparisons and is used as the linking laboratory. The computation of the linkage is in Section 8.2 on page 78 of the CCAUV.V-K1.1 Final Report.

  • Linking APMP.AUV.V-K1 to CCAUV.V-K1

The linkage between APMP.AUV.V-K1 and CCAUV.V-K1 is computed only at the frequency of 160 Hz.
The CSIRO-NML, KRISS, NMIJ, and PTB participated in both comparisons and were used as linking laboratories, as explained on pages 3 and 4 of the Linkage Report.

  • Linking EUROMET.AUV.V-K1 to CCAUV.V-K1

The PTB, BNM-CESTA and CMI participated in both comparisons and were used as linking laboratories, as explained in Appendix A of the EUROMET.AUV.V-K1 Final Report.

  • Linking SIM.AUV.V-K1 to CCAUV.V-K1

The NRC and NIST participated in both comparisons and were used as linking laboratories. The linkage process is explained in Section III-4 on page 84 of the SIM.AUV.V-K1 Final Report.

  • Linking EUROMET.AUV.V-K1.1 to CCAUV.V-K1

The PTB participated in both comparisons and was used as linking laboratory, as explained in section 8 of the EUROMET.AUV.V-K1.1 Final Report.

  • Linking APMP.AUV.V-K1.2 to CCAUV.V-K1

The NIM participated in both comparisons and was used as linking laboratory, as explained in section 8 of the APMP.AUV.V-K1.2 Final Report.

The linkage processes make it possible to extend the graph of equivalence obtained for CCAUV.V-K1 (Back-to-back accelerometer, frequency 160 Hz) to include results from other key comparisons.

CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

MEASURAND : Charge sensitivity
FREQUENCY : 160 Hz
Transfer device : Single-ended accelerometer type 8305

  • Key comparison CCAUV.V-K1
The key comparison reference value, xR, is computed as the weighted mean of all participant results. Its combined standard uncertainty, uR, is obtained as the standard deviation of the weighted mean.
xR = 0.12899 pC/(m/s2), uR = 0.00005 pC/(m/s2) and uR/xR = 0.04x10-2.

The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi - xR, and its expanded uncertainty (k = 2), Ui,
Ui = 2(ui2 - uR2)1/2.

The degree of equivalence between two laboratories i and j is given by a pair of terms:
Dij = Di - Dj = xi - xj and its expanded uncertainty (k = 2), Uij = 2(ui2 + uj2)1/2.

    • Linking CCAUV.V-K1.1 to CCAUV.V-K1

    The PTB participated in both comparisons and is used as the linking laboratory. The computation of the linkage is in Section 8.2 on page 78 of the CCAUV.V-K1.1 Final Report.

    • Linking EUROMET.AUV.V-K1 to CCAUV.V-K1

    The PTB, BNM-CESTA and CMI participated in both comparisons and were used as linking laboratories, as explained in Appendix A of the EUROMET.AUV.V-K1 Final Report.

    • Linking EUROMET.AUV.V-K1.1 to CCAUV.V-K1

    The PTB participated in both comparisons and was used as linking laboratory, as explained in section 8 of the EUROMET.AUV.V-K1.1 Final Report.

    • Linking APMP.AUV.V-K1.2 to CCAUV.V-K1

    The NIM participated in both comparisons and was used as linking laboratory, as explained in section 8 of the APMP.AUV.V-K1.2 Final Report.

    The linkage processes make it possible to extend the graph of equivalence obtained for CCAUV.V-K1 (Single-ended accelerometer, frequency 160 Hz) to include results from other key comparisons.

    CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
    EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

    MEASURAND : Charge sensitivity
    FREQUENCY : 5 kHz
    Transfer device : Back-to-back accelerometer type 8305

    • Key comparison CCAUV.V-K1

    The key comparison reference value, xR, is computed as the weighted mean of all participant results except BNM-CESTA and VNIIM. Its combined standard uncertainty, uR, is obtained as the standard deviation of the weighted mean.
    xR = 0.12936 pC/(m/s2), uR = 0.00010 pC/(m/s2) and uR/xR = 0.08x10-2.

    The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi - xR, and its expanded uncertainty (k = 2), Ui,
    Ui = 2(ui2 - uR2)1/2.

    The degree of equivalence between two laboratories i and j is given by a pair of terms:
    Dij = Di - Dj = xi - xj and its expanded uncertainty (k = 2), Uij = 2(ui2 + uj2)1/2.

      • Linking CCAUV.V-K1.1 to CCAUV.V-K1

      The PTB participated in both comparisons and is used as the linking laboratory. The computation of the linkage is in Section 8.2 on page 78 of the CCAUV.V-K1.1 Final Report.

      • Linking EUROMET.AUV.V-K1 to CCAUV.V-K1

      The PTB and the CMI participated in both comparisons were used as linking laboratories, as explained in Appendix A of the EUROMET.AUV.V-K1 Final Report.

      • Linking EUROMET.AUV.V-K1.1 to CCAUV.V-K1

      The PTB participated in both comparisons and was used as linking laboratory, as explained in section 8 of the EUROMET.AUV.V-K1.1 Final Report.

      • Linking APMP.AUV.V-K1.2 to CCAUV.V-K1

      The NIM participated in both comparisons and was used as linking laboratory, as explained in section 8 of the APMP.AUV.V-K1.2 Final Report.

      The linkage processes make it possible to extend the graph of equivalence obtained for CCAUV.V-K1 (Back-to-back accelerometer, frequency 5 kHz) to include results from other key comparisons.

      CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
      EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer device : Back-to-back accelerometer type 8305

      • Key comparison CCAUV.V-K1

      One key comparison reference value, xR, is computed for each frequency as a weighted mean of the participant results.
      xR is based on 12 laboratories at frequencies of 40 Hz to 1 kHz, 11 laboratories at 1.25 kHz to 3.15 kHz and 10 laboratories at 4 kHz and 5 kHz.
      The combined standard uncertainty, uR, of each key comparison reference value is obtained as the standard deviation of the weighted mean.

      The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi - xR, and its expanded uncertainty (k = 2), Ui.
      Ui is generally given by Ui = 2(ui2 - uR2)1/2. For laboratories excluded from the calculation of xR, Ui = 2(ui2 + uR2)1/2.

      The degree of equivalence between two laboratories i and j is given by a pair of terms:
      Dij = xi - xj and its expanded uncertainty (k = 2), Uij = 2(ui2 + uj2)1/2.

      The full matrices of equivalence are computed in four cases: Back-to-back accelerometer at frequency 40 Hz, 160 Hz and 5 kHz, and Single-ended accelerometer at frequency 160 Hz. Use the surfing links provided on the left of the page to access the corresponding values and graphs.

      Graph of the key comparison reference values, xR and associated standard uncertainty uR, both expressed in pC/(m/s2), versus the frequency expressed in Hz



      Blue diamonds: Back-to-back accelerometer type 8305 S/N 1483337
      Green squares: Single-ended accelerometer type 8305 WH 2335 S/N 1610174

      • Linking CCAUV.V-K1.1 to CCAUV.V-K1

      The PTB participated in both comparisons and is used as the linking laboratory. The computation of the linkage is in Section 8.2 on page 78 of the CCAUV.V-K1.1 Final Report.

      • Linking EUROMET.AUV.V-K1 to CCAUV.V-K1

      The PTB, BNM-CESTA and CMI participated in both comparisons and were used as linking laboratories, as explained in Appendix A of the EUROMET.AUV.V-K1 Final Report.

      • Linking EUROMET.AUV.V-K1.1 to CCAUV.V-K1

      The PTB participated in both comparisons and was used as linking laboratory, as explained in section 8 of the EUROMET.AUV.V-K1.1 Final Report.

      • Linking APMP.AUV.V-K1.2 to CCAUV.V-K1

      The NIM participated in both comparisons and was used as linking laboratory, as explained in section 8 of the APMP.AUV.V-K1.2 Final Report.

      The linkage processes make it possible to extend the graphs of equivalence obtained for CCAUV.V-K1 to include results from other key comparisons.

      CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
      EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer device : Single-ended accelerometer type 8305 WH 2335

      • CCAUV.V-K1 key comparison

      One key comparison reference value, xR, is computed for each frequency as a weighted mean of the participant results.
      No reference values are available from 2.5 kHz to 5 kHz.
      The combined standard uncertainty, uR, of each key comparison reference value is obtained as the standard deviation of the weighted mean.

      The degree of equivalence of each laboratory with respect to the reference value is given by a pair of terms: Di = xi - xR, and its expanded uncertainty (k = 2), Ui,
      Ui = 2(ui2 - uR2)1/2.

      The degree of equivalence between two laboratories i and j is given by a pair of terms:
      Dij = xi - xj and its expanded uncertainty (k = 2), Uij = 2(ui2 + uj2)1/2.

      The full matrices of equivalence are computed in four cases: Back-to-back accelerometer at frequency 40 Hz, 160 Hz and 5 kHz, and Single-ended accelerometer at frequency 160 Hz. Use the surfing links provided on the left of the page to access the corresponding values and graphs.

      Graph of the key comparison reference values, xR and associated standard uncertainty uR, both expressed in pC/(m/s2), versus the frequency expressed in Hz



      Blue diamonds: Back-to-back accelerometer type 8305 S/N 1483337
      Green squares: Single-ended accelerometer type 8305 WH 2335 S/N 1610174

      • Linking CCAUV.V-K1.1 to CCAUV.V-K1

      The PTB participated in both comparisons and is used as the linking laboratory. The computation of the linkage is in Section 8.2 on page 78 of the CCAUV.V-K1.1 Final Report.

      • Linking EUROMET.AUV.V-K1 to CCAUV.V-K1

      The PTB, BNM-CESTA and CMI participated in both comparisons and were used as linking laboratories, as explained in Appendix A of the EUROMET.AUV.V-K1 Final Report.

      • Linking EUROMET.AUV.V-K1.1 to CCAUV.V-K1

      The PTB participated in both comparisons and was used as linking laboratory, as explained in section 8 of the EUROMET.AUV.V-K1.1 Final Report.

      • Linking APMP.AUV.V-K1.2 to CCAUV.V-K1

      The NIM participated in both comparisons and was used as linking laboratory, as explained in section 8 of the APMP.AUV.V-K1.2 Final Report.

      The linkage processes make it possible to extend the graphs of equivalence obtained for CCAUV.V-K1 to include results from other key comparisons.

      CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
      EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      • Key comparison CCAUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 40 Hz
      Transfer device : Back-to-back accelerometer type 8305 S/N 1483337

      xi : result of measurement carried out by laboratory i
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      ui/xi
      / 10-2

       PTB

      0.12665

      0.05

       BNM-CESTA

      0.12670

      0.25

       CSIRO-NML

      0.12670

      0.20

       CMI

      0.12649

      0.23

       CSIR-NML

      0.12750

      0.45

       CENAM

      0.12641

      0.25

       NRC

      0.12647

      0.15

       KRISS

      0.12647

      0.18

       NMIJ

      0.12629

      0.21

       VNIIM

      0.12604

      0.20

       NIST

      0.12670

      0.15

       NMi-VSL

      0.12650

      0.13

      • Key comparison CCAUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 40 Hz
      Transfer device : Back-to-back accelerometer type 8305 designated as "B2B"

      xi-K1.1 : result of measurement carried out by laboratory i
      ui-K1.1 : combined standard uncertainty of xi-K1.1
      2ui-K1.1 : expanded uncertainty (k = 2) of xi-K1.1

       Lab i

      xi
      / [pC/(m/s2)]

      2ui/xi
      / 10-2

       PTB

      0.12598

      0.10

       NIM

      0.12601

      0.50

       NPLI

      0.12610

      0.70

       INMETRO

      0.12598

      0.24

      • Key comparison EUROMET.AUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 40 Hz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2355677 and S/N 606559

      xi-EUR : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1
      ui-EUR : combined standard uncertainty of xi-EUR

       Lab i

      xi-EUR
      / [pC/(m/s2)]

      ui-EUR/xi-EUR
      / 10-2

      BB S/N 2355677
       PTB

      0.12798

      0.05

       BNM-CESTA

      0.1278

      0.25

       GUM

      0.12793

      0.30

       DPLA

      0.12776

      0.173

       INRIM

      0.1278

      0.17

       SP

      0.1283

      0.2

       INETI

      0.1278

      0.42

       CMI

      0.12769

      0.25

       UME

      0.12803

      0.25

      BB S/N 606559
       PTB

      0.12648

      0.05

       BEV

      0.1261

      0.3

       CEM

      0.1267

      0.3

       METAS

      0.1258

      0.366

      BNM-CESTA was a participant in the CIPM MRA at the time of CCAUV.V-K1 and EUROMET.AUV.V-K1 comparisons.

      • Key comparison EUROMET.AUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 40 Hz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2161771

      xi-EUR-K1.1 : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1.1
      ui-EUR-K1.1 : combined standard uncertainty of xi-EUR-K1.1
      Ui-EUR-K1.1
      : expanded uncertainty of xi-EUR-K1.1, Ui-EUR-K1.1 = 2ui-EUR-K1.1

       Lab i

      xi-EUR-K1.1
      / [pC/(m/s2)]

      Ui-EUR-K1.1
      / %

       PTB

      0.12505

      0.10

       INETI

      0.12558

      0.51

       BEV

      0.12500

      0.60

       LNE

      0.12502

      0.60

       NCM

      0.12515

      0.20

      • Key comparison APMP.AUV.V-K1.2

      The individual measurements of NIM, KIM-LIPI and NPLI are available in Table 6 of the APMP.AUV.V-K1.2 Final Report.

      CCAUV.V-K1, CCAUV.V-K1.1, APMP.AUV.V-K1, EUROMET.AUV.V-K1, SIM.AUV.V-K1, EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      • Key comparison CCAUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Back-to-back accelerometer type 8305 S/N 1483337

      xi : result of measurement carried out by laboratory i
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      ui/xi
      / 10-2

       PTB

      0.12664

      0.05

       BNM-CESTA

      0.12670

      0.25

       CSIRO-NML

      0.12660

      0.15

       CMI

      0.12660

      0.23

       CSIR-NML

      0.12660

      0.25

       CENAM

      0.12660

      0.25

       NRC

      0.12675

      0.15

       KRISS

      0.12649

      0.18

       NMIJ

      0.12660

      0.22

       VNIIM

      0.12682

      0.20

       NIST

      0.12650

      0.15

       NMi-VSL

      0.12660

      0.17

      • Key comparison CCAUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Back-to-back accelerometer type 8305 designated as "B2B"

      xi : result of measurement carried out by laboratory i
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      2ui/xi
      / 10-2

       PTB

      0.12606

      0.10

       NIM

      0.12604

      0.20

       NPLI

      0.12630

      0.70

       INMETRO

      0.12603

      0.24

      • Key comparison APMP.AUV.V-K1

      MEASURAND : Amplified charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Back-to-back accelerometer type 8305 S/N 1610202 with charge amplifier type 2626, S/N 1242511

      xi : result of measurement carried out by laboratory i participant in APMP.AUV.V-K1 only, normalized through the linking coefficient 0.12710 pC/mV to the CCAUV.V-K1, see page 3 and page 8 of the Linkage Report
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      ui/xi
      / 10-2

       CMS/ITRI

      0.12618

      0.53

       NML-SIRIM

      0.12666

      0.16

      • Key comparison EUROMET.AUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2355677 and S/N 606559

      xi : result of measurement carried out by laboratory i participant in EUROMET.AUV.V-K1
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      ui/xi
      / 10-2

      BB S/N 2355677
       PTB

      0.12801

      0.05

       BNM-CESTA

      0.128

      0.25

       GUM

      0.12782

      0.30

       DPLA

      0.1279

      0.102

       INRIM

      0.1279

      0.17

       SP

      0.1284

      0.2

       INETI

      0.1278

      0.2

       CMI

      0.12785

      0.25

       UME

      0.12799

      0.25

      BB S/N 606559
       PTB

      0.12646

      0.05

       BEV

      0.1262

      0.28

       CEM

      0.1265

      0.3

       METAS

      0.1258

      0.338

      BNM-CESTA was a participant in the CIPM MRA at the time of CCAUV.V-K1 and EUROMET.AUV.V-K1 comparisons.

      • Key comparison SIM.AUV.V-K1

      MEASURAND : Amplified charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Back-to-back (BB) accelerometer type 8305 S/N 1687773 with charge amplifier S/N 1662291

      xi : result of measurement carried out by laboratory i participant in SIM.AUV.V-K1
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      ui/xi
      / 10-2

       NRC

      0.1251

      0.15

       INMETRO

      0.1251

      0.25

       CENAM

      0.1252

      0.25

       INTI

      0.1247

      0.55

       NIST

      0.1251

      0.15

      • Key comparison EUROMET.AUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2161771

      xi : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1.1
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      2ui/xi
      / 10-2

       PTB

      0.12521

      0.10

       INETI

      0.12549

      0.32

       BEV

      0.12472

      0.56

       LNE

      0.12526

      0.60

       NCM

      0.12519

      0.20

      • Key comparison APMP.AUV.V-K1.2

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Back-to-back (BB) accelerometer type 8305 S/N 2440139

      xi : result of measurement carried out by laboratory i participant in APMP.AUV.V-K1.2
      ui : combined standard uncertainty of xi

       Lab i

      xi
      / [pC/(m/s2)]

      2ui/xi
      / 10-2

       NIM

      0.1280

      0.5

       KIM-LIPI

      0.1278

      0.68

       NPLI

      0.1284

      0.7

      CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
      EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      • Key comparison CCAUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Single-ended accelerometer type 8305 WH 2335 S/N 1610174

      xi : result of measurement carried out by laboratory i
      ui : combined standard uncertainty xi

       Lab i

      xi
      / [pC/(m/s2)]

      ui/xi
      / 10-2

       PTB

      0.12902

      0.05

       BNM-CESTA

      0.12930

      0.25

       CSIRO-NML

      0.12890

      0.15

       CMI

      0.12900

      0.23

       CSIR-NML

      0.12870

      0.25

       CENAM

      0.12886

      0.25

       NRC

      0.12914

      0.15

       KRISS

      0.12880

      0.18

       NMIJ

      0.12878

      0.22

       VNIIM

      0.12882

      0.20

       NIST

      0.12910

      0.15

       NMi-VSL

      0.12895

      0.17

      • Key comparison CCAUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Single-ended (SE) accelerometer type 8305

      xi-K1.1 : result of measurement carried out by laboratory i
      ui-K1.1 : combined standard uncertainty of xi-K1.1
      2ui-K1.1 : expanded uncertainty (k = 2) of xi-K1.1

       Lab i

      xi
      / [pC/(m/s2)]

      2ui/xi
      / 10-2

       PTB

      0.13080

      0.1048

       NIM

      0.13098

      0.2027

       NPLI

      0.13117

      0.6996

       INMETRO

      0.13091

      0.2490

      • Key comparison EUROMET.AUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer device : Single-ended (SE) accelerometer type 8305 WH 2335 S/N 2361558

      xi-EUR : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1
      ui-EUR : combined standard uncertainty xi-EUR

       Lab i

      xi-EUR
      / [pC/(m/s2)]

      ui-EUR/xi-EUR
      / 10-2

       PTB

      0.12592

      0.05

       BNM-CESTA

      0.126

      0.25

       GUM

      0.12578

      0.30

       DPLA

      0.1259

      0.102

       INRIM

      0.1257

      0.17

       SP*

      0.1262

      0.2

       INETI*

      0.1259

      0.203

       CMI*

      0.1261

      0.25

       UME*

      0.12631

      0.25

       BEV*

      0.1265

      0.21

       CEM*

      0.1265

      0.3

       METAS*

      0.1266

      0.34

      * The results of these laboratories were corrected before further calculation to take into account the change in the sensitivity of the SE accelerometer, which occured during the comparison. The values given here are stated without the correction.

      BNM-CESTA was a participant in the CIPM MRA at the time of CCAUV.V-K1 and EUROMET.AUV.V-K1 comparisons.

      • Key comparison EUROMET.AUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 160 Hz
      Transfer devices : Single-ended (SE) accelerometers type 8305 WH 2335 S/N 1610168

      xi-EUR-K1.1 : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1.1
      ui-EUR-K1.1 : combined standard uncertainty of xi-EUR-K1.1
      Ui-EUR-K1.1
      : expanded uncertainty of xi-EUR-K1.1, Ui-EUR-K1.1 = 2ui-EUR-K1.1

       Lab i

      xi-EUR-K1.1
      / [pC/(m/s2)]

      Ui-EUR-K1.1
      / %

       PTB

      0.13070

      0.10

       INETI

      0.13090

      0.26

       BEV

      0.13040

      0.56

       LNE

      0.13068

      0.60

       NCM

      0.13065

      0.20

      • Key comparison APMP.AUV.V-K1.2

      The individual measurements of NIM, KIM-LIPI and NPLI are available in Table 5 of the APMP.AUV.V-K1.2 Final Report.

      CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
      EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      • Key comparison CCAUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 5 kHz
      Transfer device : Back-to-back accelerometer type 8305 S/N 1483337

      xi : result of measurement carried out by laboratory i
      ui : combined standard uncertainty xi

       Lab i

      xi
      / [pC/(m/s2)]

      ui/xi
      / 10-2

       PTB

      0.12934

      0.10

       BNM-CESTA

      -

      -

       CSIRO-NML

      0.12950

      0.20

       CMI

      0.12935

      0.30

       CSIR-NML

      0.12920

      0.35

       CENAM

      0.12931

      0.40

       NRC

      0.12930

      0.54

       KRISS

      0.12946

      0.22

       NMIJ

      0.12931

      0.66

       VNIIM

      0.13074

      0.34

       NIST

      0.12920

      0.60

       NMi-VSL

      0.12929

      1.89


      BNM-CESTA: no data, measurement at shifted frequency

      • Key comparison CCAUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 5 kHz
      Transfer device : Back-to-back accelerometer type 8305 designated as "B2B"

      xi-K1.1 : result of measurement carried out by laboratory i
      ui-K1.1 : combined standard uncertainty of xi-K1.1
      2ui-K1.1 : expanded uncertainty (k = 2) of xi-K1.1

       Lab i

      xi
      / [pC/(m/s2)]

      2ui/xi
      / 10-2

       PTB

      0.12884

      0.10

       NIM

      0.12851

      0.50

       NPLI

      0.12380

      1.00

       INMETRO

      0.12857

      1.00

      • Key comparison EUROMET.AUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : 5 kHz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2355677 and S/N 606559

      xi-EUR : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1
      ui-EUR : combined standard uncertainty xi-EUR

       Lab i

      xi-EUR
      / [pC/(m/s2)]

      ui-EUR/xi-EUR
      / 10-2

      BB S/N 2355677
       PTB

      0.13077

      0.1

       BNM-CESTA

      0.131

      0.25

       GUM

      0.1306

      0.30

       DPLA

      0.13054

      0.149

       INRIM

      0.1304

      0.28

       SP

      0.1312

      0.65

       INETI

      -

      -

       CMI

      0.13105

      0.4

       UME

      0.13135

      0.5

      BB S/N 606559
       PTB

      0.129

      0.15

       BEV

      0.1291

      0.33

       CEM

      0.129

      0.33

       METAS

      0.1281

      0.466

      BNM-CESTA was a participant in the CIPM MRA at the time of CCAUV.V-K1 and EUROMET.AUV.V-K1 comparisons.

      • Key comparison EUROMET.AUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : 5 kHz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2161771

      xi-EUR-K1.1 : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1.1
      ui-EUR-K1.1 : combined standard uncertainty of xi-EUR-K1.1
      Ui-EUR-K1.1
      : expanded uncertainty of xi-EUR-K1.1, Ui-EUR-K1.1 = 2ui-EUR-K1.1

       Lab i

      xi-EUR-K1.1
      / [pC/(m/s2)]

      Ui-EUR-K1.1
      / %

       PTB

      0.12791

      0.10

       INETI

      0.12820

      0.68

       BEV

      0.12740

      0.66

       LNE

      0.12741

      0.60

       NCM

      0.12791

      0.50

      • Key comparison APMP.AUV.V-K1.2

      The individual measurements of NIM, KIM-LIPI and NPLI are available in Table 6 of the AUV.AUV.V-K1.2 Final Report.

      CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
      EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      • Key comparison CCAUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer device : Back-to-back accelerometer type 8305 S/N 1483337

      xi : result of measurement carried out by laboratory i, expressed in pC/(m/s2)
      ui : combined standard uncertainty xi, ui/xi expressed in 10-2

      BNM-CESTA: no data at 4 kHz and 5 kHz (measurement at shifted frequencies)

      • Key comparison CCAUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer device : Back-to-back accelerometer type 8305 designated as "B2B"

      The laboratory individual measurement resuts are reported in page 34 of the CCAUV.V-K1.1 Final Report.

      • Key comparison EUROMET.AUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2355677 and S/N 606559

      xi-EUR : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1 expressed in pC/(m/s2)
      ui-EUR : combined standard uncertainty xi-EUR, ui-EUR/xi-EUR expressed in 10-2

      BNM-CESTA was a participant in the CIPM MRA at the time of CCAUV.V-K1 and EUROMET.AUV.V-K1 comparisons.

      • Key comparison EUROMET.AUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer devices : Back-to-back (BB) accelerometers type 8305 S/N 2161771

      xi-EUR-K1.1 : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1.1
      ui-EUR-K1.1 : combined standard uncertainty of xi-EUR-K1.1
      Ui-EUR-K1.1
      : expanded uncertainty of xi-EUR-K1.1, Ui-EUR-K1.1 = 2ui-EUR-K1.1

      • Key comparison APMP.AUV.V-K1.2

      The individual measurements of NIM, KIM-LIPI and NPLI are available in Table 6 of the APMP.AUV.V-K1.2 Final Report.

      CCAUV.V-K1, CCAUV.V-K1.1, EUROMET.AUV.V-K1,
      EUROMET.AUV.V-K1.1 and APMP.AUV.V-K1.2

      • Key comparison CCAUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer device : Single-ended accelerometer type 8305 WH 2335 S/N 1610174

      xi : result of measurement carried out by laboratory i, expressed in pC/(m/s2)
      ui : combined standard uncertainty xi, ui/xi expressed in 10-2



      BNM-CESTA: no data at 4 kHz and 5 kHz (measurement at shifted frequencies)

      • Key comparison CCAUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer device : Single-ended (SE) accelerometer type 8305

      The laboratory individual measurement resuts are reported in page 22 of the CCAUV.V-K1.1 Final Report.

      • Key comparison EUROMET.AUV.V-K1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer device : Single-ended (SE) accelerometer type 8305 WH 2335 S/N 2361558

      xi-EUR : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1 expressed in pC/(m/s2)
      ui-EUR : combined standard uncertainty xi-EUR, ui-EUR/xi-EUR expressed in 10-2

      *The results of these laboratories were corrected before further calculation to take into account the change in the sensitivity of the SE accelerometer, which occured during the comparison. The values given here are stated without the correction.

      BNM-CESTA was a participant in the CIPM MRA at the time of CCAUV.V-K1 and EUROMET.AUV.V-K1 comparisons.

      • Key comparison EUROMET.AUV.V-K1.1

      MEASURAND : Charge sensitivity
      FREQUENCY : from 40 Hz to 5 kHz
      Transfer devices : Single-ended (SE) accelerometers type 8305 WH 2335 S/N 1610168

      xi-EUR-K1.1 : result of measurement carried out by laboratory i in EUROMET.AUV.V-K1.1
      ui-EUR-K1.1 : combined standard uncertainty of xi-EUR-K1.1
      Ui-EUR-K1.1
      : expanded uncertainty of xi-EUR-K1.1, Ui-EUR-K1.1 = 2ui-EUR-K1.1

      • Key comparison APMP.AUV.V-K1.2

      The individual measurements of NIM, KIM-LIPI and NPLI are available in Table 5 of the APMP.AUV.V-K1.2 Final Report.