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The work of the Consultative Committees to increase the impact of - - PowerPoint PPT Presentation

Jan 14, 2023 262 likes •408 views

The work of the Consultative Committees to increase the impact of the CIPM MRA Dr.ir. Gerrit Rietveld CIPM member CCEM president A visionary statement www.bipm.org 2 The CIPM MRA International equivalence of measurements: The CIPM

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The work of the Consultative Committees to increase the impact of the CIPM MRA

Dr.ir. Gerrit Rietveld CIPM member CCEM president

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2 www.bipm.org

A visionary statement…

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3 www.bipm.org

International equivalence of measurements: “The CIPM Mutual Recognition Arrangement (CIPM MRA) is the framework through which National Metrology Institutes demonstrate the international equivalence of their measurement standards and the calibration and measurement certificates they issue. The outcomes of the Arrangement are the internationally recognized (peer- reviewed and approved) Calibration and Measurement Capabilities (CMCs) of the participating institutes. Approved CMCs and supporting technical data are publicly available from the CIPM MRA database (the KCDB).”

The CIPM MRA

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4 www.bipm.org

CIPM MRA working group August 2016 report : 9 recommendations 28 actions https://www.bipm.org/en/ cipm-mra-review/

25th CGPM and the CIPM MRA

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5 www.bipm.org

https://kcdb.bipm.org/ 17 of the 28 actions are on: CMC visibility in the KCDB (3) KC participation (3) Constraining proliferation of CMCs (5) CMC review process (6) 11 actions relate to the CIPM CCs

The CIPM MRA – Key Comparison DataBase

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6 www.bipm.org

CCEM: 2013: 7100 CMCs 2018: 4400 CMCs The same information, better presented, less administration

CMC proliferation - matrices

  • 40 %

Reduction of the number of CMCs is not an aim in itself!

DCC bridge CCC bridge Potentiometer system Potentiometer bridge Modified Wheatstone bridge Teraohmmeter Ratio comparison with standard 1 µW 40

  • 10 µW

4

  • 100 µW

1.5

  • 1 mW

1

  • 10 mW

0.4

  • 100 mW

0.2

  • 1 W

0.15 0.05

  • 70

10 W 0.13 0.03

  • 20

25 W 0.13 0.03

  • 100 W

0.11 0.02

  • 15

1 kW 0.09 0.02

  • 10

6.45 kW

  • 0.02

0.03

  • 10 kW

0.12 0.02 0.03 0.2

  • 10

12.9 kW

  • 0.02

0.03 0.2

  • 100 kW
  • 0.4
  • 10

1 MW

  • 1
  • 15

10 MW

  • 2

2

  • 60

100 MW

  • 7

3 100 600 1 GW

  • 20

5 100

  • 10 GW
  • 40

200

  • 100 GW
  • 100

500

  • 1 TW
  • 1000
  • 10 TW
  • 2000
  • 100 TW
  • 5000
  • 1 PW
  • 1E+04
  • 10 PW
  • 1E+05
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7 www.bipm.org

One review for all CMCs during a meeting at the BIPM Works well for TCs with: Not too many CMCs New areas (CCQM)

CMC review processes

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8 www.bipm.org

CCEM: All CMCs are reviewed within the region (intra-RMO review) As the MRA matures and trust between RMOs and NMIs increases, the inter- RMO reviews can be

  • ptimised

CMC review processes

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9 www.bipm.org

Prior to CCEM 2011: 400 % review (4 RMOs each reviewing entire set) Since CCEM 2011: 100 % review (2-4 RMOs collectively reviewing set) After CCEM 2015: selective review (<100 %, based on sampling)

Upon submission of a CMC set, a proposal for the scope of inter-RMO review is made by the Chair of WGRMO or designate, based on agreed criteria such as: – Magnitude of change – History of previous reviews – Coverage by on-site technical reviews – Rotation – High-level technical judgement

CCEM inter-RMO CMC review process

The final decision

  • n the scope of review

lies with RMOs!

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10 www.bipm.org

KCDB 2.0 – a step change in MRA impact

Today

Create CMC Review Publication

JCRB web KCDB

Tomorrow

CMC Writer CMC Reviewer CMC Finder

Link Link

Web-platform allows RMOs to view and download data Web platform ensures correct formatting No manual transfer

  • f data for review

No manual transfer of data for publication Manual transfer of Excel for review

KCDB

Intra-RMO review

TC Chair selects « GO »

WEBPLATFORM

JCRB

RMO1 RMO1 RMO1

Manual treatment of Excel and publication

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11 www.bipm.org

Less NMIs in loop:

  • CMC
  • RMO coverage
  • RMO follow-up

loop Parallel loops Only key quantities Strategic planning Training (CBKT!)

Comparisons

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12 www.bipm.org

Quantum standards (still) require comparisons BIPM travelling standards for JAVS (DC and AC) & QHE very effective for performing KCs Learning experience for all participants, including ‘leading’ NMIs Recent BIPM-led ‘star approach’ comparison finished < 2 yrs (record!)

The BIPM and CCEM comparisons

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13 www.bipm.org

The CIPM MRA is a great success in reducing or eliminating trade barriers A significant increase of the CIPM MRA efficiency and impact achieved via: Reduction of the number of CMCs (matrices) More efficient CMC review process Strategic planning of KCs BIPM-led comparisons The efficiency CIPM MRA is discussed at the yearly CC presidents meetings; experiences are exchanged, and progress of all CCs on the actions is tracked

Summary

KCDB2.0 !

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www.bipm.org

Gert.Rietveld@vsl.nl

Thank you!