# The Weights and Measures (Local and Working Standard Capacity Measures and Testing Equipment) Regulations 1987, Regulation 6: Reference meters


A reference meter shall have been tested over the range of flowrates and liquids for which it is intended to be used within 24 months before use, and the results of the test shall be such that
(a) the repeatability shall be such that the range of five consecutive tests with the same liquid at the same flowrate does not exceed 0.05 per cent. of the quantity delivered on each test;
(b) the linearity shall be such that the range of the means of any five consecutive tests with the same liquid within the flowrate range shall not exceed 0.1 per cent. of the quantity delivered on each test; and
(c) notwithstanding the application of corrections when a reference meter is used to test meter measuring systems in accordance with the Measuring Equipment (Liquid Fuel delivered from Road Tankers) Regulations 193, the accuracy of the mean of any five consecutive tests shall not exceed 0.5 per cent. of the quantity delivered on any test.

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Source: https://www.legislation.gov.uk/uksi/1987/51/regulation/6 (the official version)
Page: https://openlegislation.uk/weights-and-measures-local-and-working-standard-capacity-measures-and-testing-equipment-regulations-1987/regulation-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.