Committee members

Consultative Committee for Length (CCL)

President

Dr V. Coleman

CIPM Member

Executive Secretary

Dr G. Panfilo

BIPM

ALL MEMBERS

List of meetings

Meetings and related documents

Upcoming Meeting

19th meeting of the CCL and its working groups
  • From 07 to 11
  • October
  • 2024

Past Meeting

CCL-WG-MRA
  • From 08 to 10
  • November
  • 2022

Past Meeting

CCL-WG-S
  • 03
  • November
  • 2022

Past Meeting

CCL-TG-DIG
  • 10
  • December
  • 2021

Past Meeting

18th meeting of the CCL (online)
  • From 25 to 27
  • October
  • 2021
All meetings

Asset Publisher

Working Groups

CCL-TG-DIG

CCL Task Group on Digitalization

CCL-WG-MRA

CCL Working Group on the CIPM MRA

CCL-WG-N

CCL Working Group on Dimensional Nanometrology

CCL-WG-S

CCL Working Group on Strategic Planning
 

Discussion Groups

CCL-DG1

CCL Discussion Group on Gauge Blocks

CCL-DG2

CCL Discussion Group on Thermal Expansion

CCL-DG3

CCL Discussion Group on Angle

CCL-DG4

CCL Discussion Group on Cylindrical Diameter Standards

CCL-DG5

CCL Discussion Group on Step Gauges

CCL-DG6

CCL Discussion Group on Coordinate Metrology

CCL-DG7

CCL Discussion Group on Linescales

CCL-DG8

CCL Discussion Group on Surface texture

CCL-DG11

CCL Discussion Group on Mise en pratique lasers and femtosecond combs

Publications

Publications

Meeting reports

[CCL] 18th meeting (2021)

[CCL] 17th meeting (2018)

Guidance documents on the CIPM MRA

[CCL] CCL-GD-1
Running of MRA comparisons in length metrology and monitoring their impact on CMCs

[CCL] L - Classification of services in Length - DimVIM

All publications

ccl-mission

Mission

The Consultative Committee for the Definition of the Metre (CCDM) was set up in 1952. Its name was changed to Consultative Committee for Length by the CIPM in 1997.

Present activities concern matters related to the definition and realization of the metre, practical length and angle measurement, and advice to the CIPM in the field of length metrology.

Asset Publisher

Reports and announcements

Decisions of the CIPM (March 2023 - Session I)

Report of the 111th meeting of the CIPM (2022)

Resolutions adopted at the 27th meeting of the CGPM

CC survey on the digital transformation

A digital framework for realising the SI - a proposal for the metre

Decisions of the CIPM (June 2022)

BIPM Annual Review 2021/2022

Report of the 110th meeting of the CIPM (2021)

CCRI webinar on Git for Metrology - video available

Draft Resolutions - 27th CGPM meeting (2022)

BIPM Strategic Plan 2022

Report of Session II of the 110th meeting of the CIPM (2021)

Report of the 18th meeting of the CCL (2021)

Report of Session I of the 110th meeting of the CIPM (2021)

Metrologia - A review of approaches for the practical realization of traceable length metrology from 10−11 m to 1013 m

BIPM Annual Review 2020/2021

Report of the 109th meeting of the CIPM (2020)

Outcomes of the 43rd JCRB meeting (2021)

Metrologia: Focus on Length Metrology