# Commission Regulation (EU) 2017/1151 of 1 June 2017 supplementing Regulation (EC) No 715/2007 of the European Parliament and of the Council on type-approval of motor vehicles with respect to emissions from light passenger and commercial vehicles (Euro 5 and Euro 6) and on access to vehicle repair and maintenance information, amending Directive 2007/46/EC of the European Parliament and of the Council, Commission Regulation (EC) No 692/2008 and Commission Regulation (EU) No 1230/2012 and repealing Commission Regulation (EC) No 692/2008 (Text with EEA relevance), Division 6.2: Calibration gases


The true concentration of a calibration gas shall be within ± 1 per cent of the stated value or as given below, and shall be traceable to national or international standards.
Mixtures of gases having the following compositions shall be available with bulk gas specifications in accordance with paragraphs 6.1.2.1. or 6.1.2.2.:
(a)C3H8 in synthetic air (see paragraph 6.1.2.2.);
(b)CO in nitrogen;
(c)CO2 in nitrogen;
(d)CH4 in synthetic air;
(e)NO in nitrogen (the amount of NO2 contained in this calibration gas shall not exceed 5 per cent of the NO content).

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Source: https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/5/division/division/6./division/6.2. (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/5/division/division-6./division-6.2.
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.