{
  "url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/5/division/division-5./division-5.1.",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-1151/annex-Sub/5/division/division-5./division-5.1..json",
  "legislation": "eur/2017/1151",
  "legislation_title": "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)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-1151",
  "path": "annex/Sub/5/division/division/5./division/5.1.",
  "kind": "division",
  "number": "5.1",
  "heading": "Calibration intervals",
  "text": "Table A5/3\nInstrument calibration intervals\nInstrument checks\nInterval\nCriterion\nGas analyser linearization (calibration)\nEvery 6 months\n± 2 per cent of reading\nMid span\nEvery 6 months\n± 2 per cent\nCO NDIR:CO2/H2O interference\nMonthly\n– 1 to 3 ppm\nNOx converter check\nMonthly\n> 95 per cent\nCH4 cutter check\nYearly\n98 per cent of ethane\nFID CH4 response\nYearly\nSee paragraph 5.4.3. of this Sub-Annex\nFID air/fuel flow\nAt major maintenance\nAccording to instrument manufacturer.\nLaser infrared spectrometers (modulated high resolution narrow band infrared analysers): interference check\nYearly or at major maintenance\nAccording to instrument manufacturer.\nQCL\nYearly or at major maintenance\nAccording to instrument manufacturer.\nGC methods\nSee paragraph 7.2. of this Sub-Annex\nSee paragraph 7.2. of this Sub-Annex\nLC methods\nYearly or at major maintenance\nAccording to instrument manufacturer.\nPhotoacoustics\nYearly or at major maintenance\nAccording to instrument manufacturer.\nMicrogram balance linearity\nYearly or at major maintenance\nSee paragraph 4.2.2.2. of this Sub-Annex\nPNC (particle number counter)\nSee paragraph 5.7.1.1. of this Sub-Annex\nSee paragraph 5.7.1.3. of this Sub-Annex\nVPR (volatile particle remover)\nSee paragraph 5.7.2.1. of this Sub-Annex\nSee paragraph 5.7.2. of this Sub-Annex\nTable A5/4\nConstant volume sampler (CVS) calibration intervals\nCVS\nInterval\nCriterion\nCVS flow\nAfter overhaul\n± 2 per cent\nDilution flow\nYearly\n± 2 per cent\nTemperature sensor\nYearly\n± 1 °C\nPressure sensor\nYearly\n± 0,4 kPa\nInjection check\nWeekly\n± 2 per cent\nTable A5/5\nEnvironmental data calibration intervals\nClimate\nInterval\nCriterion\nTemperature\nYearly\n± 1 °C\nMoisture dew\nYearly\n± 5 per cent RH\nAmbient pressure\nYearly\n± 0,4 kPa\nCooling fan\nAfter overhaul\nAccording to paragraph 1.1.1. of this Sub-Annex",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/1151/annex/Sub/5/division/division/5./division/5.1.",
    "retrieved_at": "2026-11-01T14:44:48.753743+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."
}