{
  "url": "https://openlegislation.uk/eu-regulation-1985-3821/annex-2/division-III/division-20",
  "json_url": "https://openlegislation.uk/eu-regulation-1985-3821/annex-2/division-III/division-20.json",
  "legislation": "eur/1985/3821",
  "legislation_title": "Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport",
  "legislation_url": "https://openlegislation.uk/eu-regulation-1985-3821",
  "path": "annex/2/division/III/division/20",
  "kind": "division",
  "number": "20",
  "heading": "Calibration",
  "text": "154 The calibration function shall allow:\nto automatically pair the motion sensor with the VU,\nto digitally adapt the constant of the recording equipment (k) to the characteristic coefficient of the vehicle (w) (vehicles with two or more axle ratios shall be fitted with a switch device whereby these various ratios will automatically be brought into line with the ratio for which the equipment has been adapted to the vehicle),\nto adjust (without limitation) the current time,\nto adjust the current odometer value,\nto update motion sensor identification data stored in the data memory,\nto update or confirm other parameters known to the recording equipment: vehicle identification, w, l, tyre size and speed limiting device setting if applicable.\n155 Pairing the motion sensor to the VU shall consist, at least, in:\nupdating motion sensor installation data held by the motion sensor (as needed),\ncopying from the motion sensor to the VU data memory necessary motion sensor identification data.\n156 The calibration function shall be able to input necessary data through the calibration/downloading connector in accordance with the calibration protocol defined in Appendix 8. The calibration function may also input necessary data through other connectors.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Inserted by Council Regulation (EC) No 2135/98 of 24 September 1998 amending Regulation (EEC) No 3821/85 on recording equipment in road transport and Directive 88/599/EEC concerning the application of Regulations (EEC) No 3820/85 and (EEC) No 3821/85."
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Substituted by Commission Regulation (EC) No 1360/2002 of 13 June 2002 adapting for the seventh time to technical progress Council Regulation (EEC) No 3821/85 on recording equipment in road transport (Text with EEA relevance)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/1985/3821/annex/2/division/III/division/20",
    "retrieved_at": "2026-11-01T15:05:16.849228+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}