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Presentation by Dr Sacconi at the 24th meeting of the CGPM
CCL working groups
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DimVIM: Multilingual CMC classification scheme
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JWGFS CCL-CCTF Frequency Standards Working Group access restricted to WG members
  • Joint Chairs: Dr F. Riehle, PTB, and Prof. P. Gill, NPL
  • WG-MRA CCL Working Group on the CIPM MRA (WG-MRA) access restricted to WG members
  • Chair: Dr R. Thalmann, METAS

  • ex officio members: TG chairs, members of TGs
  • Tentative terms of reference


  • sWG-KC: Sub-group on key comparisons
  • Chair: Dr A. Lewis, NPL
  • Members: DG moderators, RMO TCL chair persons, KC pilots
  • Terms of reference


  • sWG-CMC: Sub-group on CMCs and the DimVIM
  • Chair: Dr J.C. de Oliveira, INMETRO
  • Members: RMO TCL chairpersons
  • Terms of reference
  • DimVIM: Multilingual CMC classification scheme


  • TG-L: Task Group on KC linking
  • Chair: Dr J. Decker, NRC
  • Members: Dr W. Giardini, Dr M. Viliesid, Dr H. Bosse, DG moderators
  • Terms of reference


  • Discussion groups:
    DG1 Gauge blocks A. Lewis, NPL
    DG2 Thermal expansion T. Takatsuji, NMIJ/AIST
    DG3: Angle O. Kruger, NMISA
    DG4: Cylindrical diameter standards J. Stone, NIST
    DG5: Step gauges E. Prieto, CEM
    DG6: Coordinate metrology A. Balsamo, INRIM
    DG7: Linescales H. Bosse, PTB
    DG8: Surface texture A. Baker, NMIA
    DG11: Mise en pratique lasers and fs combs    M. Matus, BEV
    Terms of reference
    WG-N CCL Working Group on Dimensional Nanometrology access restricted to WG members
  • Chair: Dr R. Dixon, NIST
  • Members: specialists from Member NMIs
  • Terms of reference: to be formulated
  • WG-S CCL Working Group on Strategic Planning access restricted to WG members
  • Chair: Dr Sacconi, INRIM
  • Members: WG chairs, TG chairs, RMO representatives, representative of JWGFS, Dr Giardini, Dr Pekelsky, Dr Takatsuji, CCL Executive Secretary
  • Terms of reference


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