# 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 2.1.1: Discrete-mode NRSC tests

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

The emission rate of a gaseous emission qm gas, i [g/h] for each mode i of the steady state test shall be calculated by multiplying the concentration of the gaseous emission with its respective flow, as follows:
q m gas, i = k h × k × u gas × q m ew, i × c gas, i × 3600
(7-1)
where:
k 1 for cgasr,w,i in [ppm] and k = 10 000 for cgasr,w,i in [% vol]
k h NOx correction factor [-], for NOx emission calculation (see point 2.1.4)
u gas component specific factor or ratio between densities of gas component and exhaust gas [-]
qm ew, i exhaust gas mass flow rate in mode i on a wet basis [kg/s]
c gas, i emission concentration in the raw exhaust gas in mode i, on a wet basis [ppm] or [% vol]

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VII/division/2/division/2.1/division/2.1.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VII/division-2/division-2.1/division-2.1.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.