# The Measuring Equipment (Cold-water Meters) Regulations 1988, Regulation 7


(1) Where a group of cold-water meters of the same design, the same class, the same nominal flowrate (Qn), the same manufacture and with the manufacturer’s mark on each is submitted for testing, and the conditions specified in paragraph (2) below are satisfied with respect to the group, the testing may, at the request of the submitter, be confined to a number of meters determined and selected as specified in paragraph (3) below.
(2) The conditions referred to in paragraph (1) above are—
(a) the group shall be clearly identifiable and shall consist of meters which exceed 150 but do not exceed 35,000 in number;
(b) the meters in the group shall all have been produced by the same production process, such production process being the subject of a quality system;
(c) the group shall be accompanied by records of the production process, of the testing of each meter and of any subsequent action taken by the manufacturer which are adequate to show that the meters in the group are likely to fall within the prescribed limits of error; and
(d) the equipment used to test meters in the group shall comply with clause 7.6 of BS EN ISO 9001: 2000.
(3) The number of meters referred to in paragraph (1) above shall be determined and the meters shall be selected by sampling plans and procedures using samples which the inspector considers to be representative, in accordance with either—
(a) BS 6001: Part 1: 1999 which provides an acceptable quality level equal to 1 per cent; or
(b) BS 6001: Part 2: 1993 which provides a limiting quality of 5 per cent.
In either case the sample of meters chosen shall be tested for attributes, including for limits of error, as set out in paragraphs (1) to (3) of regulation 6 above.
(4) If the sample selected as specified in paragraph (3) above satisfies the test, the other meters in the group shall be treated as having satisfied the test.

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Source: https://www.legislation.gov.uk/uksi/1988/997/regulation/7 (the official version)
Page: https://openlegislation.uk/measuring-equipment-cold-water-meters-regulations-1988/regulation-7
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.