{
  "url": "https://openlegislation.uk/eu-regulation-2017-655/annex/appendix-1",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-655/annex/appendix-1.json",
  "legislation": "eur/2017/655",
  "legislation_title": "Commission Delegated Regulation (EU) 2017/655 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to monitoring of gaseous pollutant emissions from in-service internal combustion engines installed in non-road mobile machinery (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-655",
  "path": "annex/appendix/1",
  "kind": "appendix",
  "number": "1",
  "heading": null,
  "text": "Portable Emissions Measurement System\n1.\nThe PEMS shall include the following measurement instruments:\n(a) gas analysers to measure the concentrations of the gaseous pollutant emissions set out in the first paragraph of point 1 of Appendix 2;\n(b) an Exhaust Flow Meter (EFM) based on the averaging Pitot or equivalent principle;\n(c) sensors to measure the ambient temperature and pressure;\n(d) other measurement instruments required for the in-service monitoring test;\nPEMS shall also include:\n(a) a transfer line to transport the extracted samples from the sampling probe to the gas analysers, including a sampling probe;\n(b) a data logger to store the data collected from the ECU;\n(c) PEMS may include a Global Positioning System (GPS).\n2.\nMeasurement instruments requirements\n2.1.\nMeasurement Instruments shall meet the requirements on calibration and performance checks set out in Section 8.1 of Annex VI to Delegated Regulation (EU) 2017/654. Special attention shall be given to perform the following actions:\n(a) the vacuum-side leak verification of the PEMS as set out in Section 8.1.8.7 of Annex VI to Delegated Regulation (EU) 2017/654;\n(b) the response and updating-recording verification of the gas analyser as set out in Section 8.1.6 of Annex VI to Delegated Regulation (EU) 2017/654.\n2.1.2.\nMeasurement instruments shall meet the specifications set out in Section 9.4 of Annex VI to Delegated Regulation (EU) 2017/654.\n2.1.3.\nThe analytical gases used for calibrating the measurement instruments shall meet the requirements set out in Section 9.5.1 of Annex VI to Delegated Regulation (EU) 2017/654.\n2.2.\nTransfer line and sampling probe requirements\n2.2.1.\nThe transfer line shall meet the requirements set out in point 9.3.1.2 of Annex VI to Delegated Regulation (EU) 2017/654.\n2.2.2.\nThe sampling probe shall meet the requirements set out in point 9.3.1.1 of Annex VI to Delegated Regulation (EU) 2017/654.",
  "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/2017/655/annex/appendix/1",
    "retrieved_at": "2026-11-01T14:45:01.033154+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."
}