# 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, Division 2.3.1.2.1: Background correction

Extent: E+W+S+N.I.

The particulate mass m PM,c [g] may be background corrected by means of equation (7-50):
m PM,c = m f m sep − m b m sd × 1 − 1 D × m ed 1000
(7-50)
Where:
m f particulate mass sampled over the cycle [mg]
m sep mass of diluted exhaust gas passing the particulate collection filters [kg]
m sd mass of dilution air sampled by background particulate sampler [kg]
m b mass of collected background particulates of dilution air [mg]
m ed mass of diluted exhaust gas over the cycle [kg]
D dilution factor [see equation (7-28) of point 2.2.2.2] [-]

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Source: 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 (the official version)
Page: 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
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.