# The Weights and Measures (Local and Working Standard Capacity Measures and Testing Equipment) Regulations 1987, Regulation 3


(1) Working standard capacity measures provided pursuant to section 5(1) of the Act for use by inspectors of weights and measures shall be tested by one of the following methods:—
Method 1
(a) where the test relates to an indicated imperial measurement not exceeding 1 gal or an indicated metric measurement not exceeding 5 1, by transfer of water from an equivalent local standard capacity measure;
(b) in any other case by transfer of water from a local standard capacity measure of maximum possible capacity in relation to the working standard used the requisite number of times;
Method 2
by pouring water of a known temperature into the measure under test, when the measure is resting on a horizontal surface—
(a) where the nominal capacity of the measure defined by a line, until the bottom of the meniscus coincides with the top of that line or with the top of any graduation line or tolerance mark being tested; or
(b) where the nominal capacity of the measure is defined by its brim, until the surface water coincides with the brim;
and in either case determining the weight of the water on a suitable weighing machine (the discrimination threshold of which in grams shall not be more than one-fifth of the equivalent amount in millilitres of the appropriate limit of error set out in Schedule 1 to these Regulations) and calculating therefrom the capacity of the measure in accordance with British Standard 1797: 1968 or British Standard 6696: 1986.
(2) A working standard capacity measure shall be tested as a measure of any amount in Schedule 3 to the Act which it is designed to measure and the accuracy of any tolerance marks adjacent to any graduation tested shall also be tested.

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Source: https://www.legislation.gov.uk/uksi/1987/51/regulation/3 (the official version)
Page: https://openlegislation.uk/weights-and-measures-local-and-working-standard-capacity-measures-and-testing-equipment-regulations-1987/regulation-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.