Statutory Instrument 1990 No. 2626

The Weights and Measures (Local and Working Standard Capacity Measures and Testing Equipment) Regulations 1990

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© Crown Copyright 1990

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1990 No. 2626

WEIGHTS AND MEASURES

The Weights and Measures (Local and Working Standard Capacity Measures and Testing Equipment) Regulations 1990

The Secretary of State, in exercise of his powers under sections 4(5) and (6), 5(9), 86(1) and 94(1) of the Weights and Measures Act 1985^[1] and of all other powers enabling him in that behalf, hereby makes the following Regulations:—

Citation, commencement and revocation
    1.—(1)  These Regulations may be cited as the Weights and Measures (Local and Working Standard Capacity Measures and Testing Equipment) Regulations 1990 and shall come into force on 21st January 1991.

    (2)  The Weights and Measures (Local and Working Standard Capacity Measures and Testing Equipment) Regulations 1987^[2] are hereby revoked.

Interpretation
    2.—(1)  In these Regulations:—

"the Act" means the Weights and Measures Act 1985;


"differential pressure gauge" means an instrument used to determine the pressure loss across either a cold-water meter or a reference meter for water;


"discrimination threshold" means the smallest change which produces a perceptible change in the indication;


"linearity" means the horizontal band within which the graph of the meter error of a reference meter lies over the authorised range of flowrates;


"multifiller" means a device consisting of a number of calibrated measures, capable of dispensing simultaneously known quantities of water, used for the testing of capacity measures;


"piston prover" means a device which can deliver or accept water in quantities determined by the displacement of a piston in a cylinder;


"proving tank" does not include a proving tank for water;


"proving tank for water" means a local or working standard capacity measure which is used solely with water to test cold-water meters or reference meters for water;


"reference meter" means a meter for use in testing measuring equipment used for the measurement of liquid fuel delivered from road tankers;


"repeatability" means the ability of weighing or measuring equipment to indicate, under defined conditions of use, closely similar quantities on repeated measurings, expressed as a 95 per cent confidence interval;


"suitable weighing machine" means a weighing machine having a discrimination threshold and a repeatability in grams not exceeding one fifth of the limit of error expressed in millilitres of the standard or equipment it is being used to test; and


"95 per cent confidence interval" means the range of values within which the true value may be expected to lie with a 0.95 level of probability.

    (2)  The abbreviations of, and symbols for, units of measurement used in these Regulations refer to the relevant units as follows:—

Imperial System		Metric System
fluid ounce	fl oz	millilitre	ml
pint	pt	litre	l
gallon	gal

[1] 1985 c. 72. back

[2] S.I. 1987/51. back

Explanatory Note