{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-3/division-3.7/division-3.7.2",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-3/division-3.7/division-3.7.2.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/3/division/3.7/division/3.7.2",
  "kind": "division",
  "number": "3.7.2",
  "heading": "Background correction",
  "text": "The same approach as that of point 3.6.1 shall be applied to correct the mass of PM for the background. Multiplying M – PMbkgnd by the total flow of dilution air, the total background mass of PM (m PMbkgnd [g]) is obtained. Subtraction of total background mass from total mass gives background corrected mass of particulates m PMcor [g] [equation (7-125)]:\nm PMcor = m PMuncor − M – PMbkgnd × n airdil\n(7-125)\nwhere:\nm PMuncor uncorrected PM mass [g]\nM – PMbkgnd mean PM concentration in dilution air [g/mol]\nn airdil dilution air molar flow [mol]",
  "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/3/division/3.7/division/3.7.2",
    "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."
}