{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-8/division-8.1/division-8.1.2",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-8/division-8.1/division-8.1.2.json",
  "legislation": "eur/2017/654",
  "legislation_title": "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",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-654",
  "path": "annex/VI/division/8/division/8.1/division/8.1.2",
  "kind": "division",
  "number": "8.1.2",
  "heading": "Summary of calibration and verification",
  "text": "Table 6.4 summarizes the calibrations and verifications described in section 8 and indicates when these have to be performed.\nTable 6.4\nSummary of Calibration and Verifications\nPerform calibrations and verifications more frequently, according to measurement system manufacturer instructions and good engineering judgment.\nThe CVS verification is not required for systems that agree within ± 2 % based on a chemical balance of carbon or oxygen of the intake air, fuel, and diluted exhaust gas.\nType of calibration or verification\nMinimum frequency\n8.1.3: accuracy, repeatability and noise\nAccuracy: Not required, but recommended for initial installation.\nRepeatability: Not required, but recommended for initial installation.\nNoise: Not required, but recommended for initial installation.\n8.1.4: linearity verification\nSpeed: Upon initial installation, within 370 days before testing and after major maintenance.\nTorque: Upon initial installation, within 370 days before testing and after major maintenance.\nIntake air, dilution air and diluted exhaust gas flows and batch sample flow rates: Upon initial installation, within 370 days before testing and after major maintenance, unless flow is verified by propane check or by carbon or oxygen balance.\nRaw exhaust gas flow: Upon initial installation, within 185 days before testing and after major maintenance, unless flow is verified by propane check or by carbon or oxygen balance.\nGas dividers: Upon initial installation, within 370 days before testing and after major maintenance.\nGas analyzers (unless otherwise noted): Upon initial installation, within 35 days before testing and after major maintenance.\nFTIR analyser: Upon installation, within 370 days before testing and after major maintenance.\nPM balance: Upon initial installation, within 370 days before testing and after major maintenance.\nStand-alone pressure and temperature: Upon initial installation, within 370 days before testing and after major maintenance.\n8.1.5: Continuous gas analyzer system response and updating-recording verification — for gas analyzers not continuously compensated for other gas species\nUpon initial installation or after system modification that would affect response.\n8.1.6: Continuous gas analyzer system response and updating-recording verification — for gas analyzers continuously compensated for other gas species\nUpon initial installation or after system modification that would affect response.\n8.1.7.1: torque\nUpon initial installation and after major maintenance.\n8.1.7.2: pressure, temperature, dew point\nUpon initial installation and after major maintenance.\n8.1.8.1: fuel flow\nUpon initial installation and after major maintenance.\n8.1.8.2: intake flow\nUpon initial installation and after major maintenance.\n8.1.8.3: exhaust gas flow\nUpon initial installation and after major maintenance.\n8.1.8.4: diluted exhaust gas flow (CVS and PFD)\nUpon initial installation and after major maintenance.\n8.1.8.5: CVS/PFD and batch sampler verification\nUpon initial installation, within 35 days before testing, and after major maintenance. (Propane check)\n8.1.8.8: vacuum leak\nUpon installation of the sampling system. Before each laboratory test according to point 7.1: within 8 hours before the start of the first test interval of each duty cycle sequence and after maintenance such as pre-filter changes.\n8.1.9.1: CO2 NDIR H2O interference\nUpon initial installation and after major maintenance.\n8.1.9.2: CO NDIR CO2 and H2O interference\nUpon initial installation and after major maintenance.\n8.1.10.1: FID calibration\nHC FID optimization and HC FID verification\nCalibrate, optimize, and determine CH4 response: upon initial installation and after major maintenance.\nVerify CH4 response: upon initial installation, within 185 days before testing, and after major maintenance.\n8.1.10.2: raw exhaust gas FID O2 interference\nFor all FID analyzers: upon initial installation, and after major maintenance.\nFor THC FID analyzers: upon initial installation, after major maintenance, and after\nFID optimization according to 8.1.10.1.\n8.1.11.1: CLD CO2 and H2O quench\nUpon initial installation and after major maintenance.\n8.1.11.3: NDUV HC and H2O interference\nUpon initial installation and after major maintenance.\n8.1.11.4: Sample dryer NO 2 penetration (chiller)\nUpon initial installation and after major maintenance.\n8.1.11.5: NO2-to-NO converter conversion\nUpon initial installation, within 35 days before testing, and after major maintenance.\n8.1.12: Sample dryer verification\nFor thermal chillers: upon installation and after major maintenance. For osmotic membranes: upon installation, within 35 days of testing and after major maintenance.\n8.1.13.1: PM balance and weighing\nIndependent verification: upon initial installation, within 370 days before testing, and after major maintenance.\nZero, span, and reference sample verifications: within 12 hours of weighing, and after major maintenance.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Delegated Regulation (EU) 2018/989 of 18 May 2018 amending and correcting Delegated Regulation (EU) 2017/654 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 (Text with EEA relevance)."
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "Perform calibrations and verifications more frequently, according to measurement system manufacturer instructions and good engineering judgment."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "The CVS verification is not required for systems that agree within ± 2 % based on a chemical balance of carbon or oxygen of the intake air, fuel, and diluted exhaust gas."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/654/annex/VI/division/8/division/8.1/division/8.1.2",
    "retrieved_at": "2026-11-01T14:45:01.864924+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."
}