{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.3/division-2.3.1/division-2.3.1.2/division-2.3.1.2.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.3/division-2.3.1/division-2.3.1.2/division-2.3.1.2.1.json",
  "legislation": "eur/2017/654",
  "legislation_title": "Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-654",
  "path": "annex/VII/division/2/division/2.3/division/2.3.1/division/2.3.1.2/division/2.3.1.2.1",
  "kind": "division",
  "number": "2.3.1.2.1",
  "heading": "Background correction",
  "text": "The particulate mass m PM,c [g] may be background corrected by means of equation (7-50):\nm PM,c = m f m sep − m b m sd × 1 − 1 D × m ed 1000\n(7-50)\nWhere:\nm f particulate mass sampled over the cycle [mg]\nm sep mass of diluted exhaust gas passing the particulate collection filters [kg]\nm sd mass of dilution air sampled by background particulate sampler [kg]\nm b mass of collected background particulates of dilution air [mg]\nm ed mass of diluted exhaust gas over the cycle [kg]\nD dilution factor [see equation (7-28) of point 2.2.2.2] [-]",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/2/division/2.3/division/2.3.1/division/2.3.1.2/division/2.3.1.2.1",
    "retrieved_at": "2026-11-01T14:45:01.864924+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."
}