Working Group Members

CCL Discussion Group on gauge blocks (short & long) (CCL-DG1)


Prof. Andrew Lewis

Engineering Measurement

National Physical Laboratory

United Kingdom

ccl-dg1 TOR

Terms of reference

The terms of reference of DG1 are:

  • to advise the CCL on matters relating to end standards, including gauge blocks, length bars and step gauges;
  • to advise the CCL on matters related to interferometry with mise en pratique (laser) wavelengths, including the effects of the index of refraction of air;
  • to produce a working document on principal uncertainty components in end standards metrology;
  • to harmonize the terms and definitions related to end standards metrology.

List of meetings

CCL logo

Asset Publisher

Working Groups