# 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, Division 8.1.1: Introduction

Extent: E+W+S+N.I.

This point describes required calibrations and verifications of measurement systems. See point 9.4 for specifications that apply to individual instruments.
Calibrations or verifications shall be generally performed over the complete measurement chain.
If a calibration or verification for a portion of a measurement system is not specified, that portion of the system shall be calibrated and its performance verified at a frequency consistent with any recommendations from the measurement system manufacturer and consistent with good engineering judgment.
Internationally recognized-traceable standards shall be used to meet the tolerances specified for calibrations and verifications.

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VI/division/8/division/8.1/division/8.1.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-8/division-8.1/division-8.1.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.