Regulation 17
Where a group of capacity serving measures of the same design, the same nominal capacity and the same manufacture 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 measures determined and selected as specified in paragraph (3) below.
The conditions referred to in paragraph (1) above are —
the group shall be clearly identifiable and shall consist of measures which exceed 500 but do not exceed 150,000 in number;
the measures in the group shall all have been produced by the same production process; and
the group shall be accompanied by records of the production process and of any subsequent action taken by the manufacturer which are adequate to show that the measures in the group are likely to fall within the prescribed limits of error.
The number of measures referred to in paragraph (1) above shall be determined and the measures shall be selected by sampling plans and procedures using samples which the inspector considers to be representative, in accordance with either (a) below or, at the request of the submitter, (b) below:
British Standard Specification for Sampling procedures and charts for inspection by attributes BS 6001:1972f1 which provides an acceptable quality level equal to 1 per cent. in which case the sample of measures chosen shall be tested for attributes, including for limits of error on capacity which may be done volumetrically or gravimetrically as in Regulation 16 above;
the test at (a) shall be performed for all the appropriate requirements of these Regulations except for limits of error on capacity;
a sub-sample of the measures chosen for the test at (a), which the inspector considers to be representative, shall be tested gravimetrically as in regulation 16(b) above in accordance with the British Standard Specification for Sampling procedures and charts for inspection by variables for percent defective BS 6002:1979f2 and which provide an acceptable quality level equal to 1 per cent.
If the sample selected as specified in paragraph (3) above satisfies the test at (a) or both tests at (b), the other measures in the group shall be treated as having satisfied the test or tests as the case may be.
Annotations
Footnotes
- f1
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SBN No. 580 07081 6, published by the British Standards Insitution on 30th March 1972 as amended February 1984.
- f2
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ISBN No. 0 580 10806 6, published by the British Standards Insitution on 31st May 1979.