{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-9/division-9.4/division-9.4.2",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-9/division-9.4/division-9.4.2.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/9/division/9.4/division/9.4.2",
  "kind": "division",
  "number": "9.4.2",
  "heading": "Data recording and control",
  "text": "The test system shall be able to update data, record data and control systems related to operator demand, the dynamometer, sampling equipment, and measurement instruments. Data acquisition and control systems shall be used that can record at the specified minimum frequencies, as shown in Table 6.7 (this Table does not apply to discrete-mode NRSC testing).\nTable 6.7\nData recording and control minimum frequencies\nApplicable Test Protocol Section\nMeasured Values\nMinimum Command and Control Frequency\nMinimum Recording Frequency\n7.6\nSpeed and torque during an engine step-map\n1 Hz\n1 mean value per step\n7.6\nSpeed and torque during an engine sweep-map\n5 Hz\n1 Hz means\n7.8.3\nTransient (NRTC and LSI-NRTC) duty cycle reference and feedback speeds and torques\n5 Hz\n1 Hz means\n7.8.2\nDiscrete-mode NRSC and RMC duty cycle reference and feedback speeds and torques\n1 Hz\n1 Hz\n7.3\nContinuous concentrations of raw analyzers\nN/A\n1 Hz\n7.3\nContinuous concentrations of dilute analyzers\nN/A\n1 Hz\n7.3\nBatch concentrations of raw or dilute analyzers\nN/A\n1 mean value per test interval\n7.6\n8.2.1\nDiluted exhaust gas flow rate from a CVS with a heat exchanger upstream of the flow measurement\nN/A\n1 Hz\n7.6\n8.2.1\nDiluted exhaust gas flow rate from a CVS without a heat exchanger upstream of the flow measurement\n5 Hz\n1 Hz means\n7.6\n8.2.1\nIntake-air or exhaust gas flow rate (for raw transient measurement)\nN/A\n1 Hz means\n7.6\n8.2.1\nDilution air if actively controlled\n5 Hz\n1 Hz means\n7.6\n8.2.1\nSample flow from a CVS with a heat exchanger\n1 Hz\n1 Hz\n7.6\n8.2.1\nSample flow from a CVS without a heat exchanger\n5 Hz\n1 Hz mean",
  "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/2017/654/annex/VI/division/9/division/9.4/division/9.4.2",
    "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."
}