# Council Regulation (EEC) No 3821/85 of 20 December 1985 on recording equipment in road transport, Division 5: Measurement of errors

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

259 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:
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/1985/3821/annex/2/division/VI/division/5 (the official version)
Page: https://openlegislation.uk/eu-regulation-1985-3821/annex-2/division-VI/division-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.