# Commission Implementing Regulation (EU) 2016/799 of 18 March 2016 implementing Regulation (EU) No 165/2014 of the European Parliament and of the Council laying down the requirements for the construction, testing, installation, operation and repair of tachographs and their components (Text with EEA relevance), Division (414): The measurement of errors on installation and during use shall be carried out under the following conditions, which are to be regarded as constituting standard test conditions:

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

vehicle unladen, in normal running order,
tyre pressures in accordance with the manufacturer's instructions,
tyre wear, within the limits allowed by national law,
vehicle movement:
the vehicle shall advance under its own engine power in a straight line on level ground and at a speed of 50 ± 5 km/h. The measuring distance shall be at least 1 000 m.
provided that it is of comparable accuracy, alternative methods, such as a suitable test bench, may also be used for the test.

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Source: https://www.legislation.gov.uk/eur/2016/799/annex/1/division/6/division/6.5/division/414 (the official version)
Page: https://openlegislation.uk/eu-regulation-2016-799/annex-1/division-6/division-6.5/division-414
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.