Electricity and Gas Inspection Regulations
(a) that the apparatus has been calibrated in the manner prescribed in section 7;
(b) that the proposed manner of installation and use of the measuring apparatus is appropriate; and
(c) that no error at any of the points tested throughout the measuring range referred to in section 7 exceeds two per cent of the value or reading at that point indicated by the reference standard referred to in paragraph 7(b).
(2) A certificate issued pursuant to subsection (1) shall be valid
(a) only for use of the measuring apparatus within the measuring range referred to in section 7;
(b) only for the installation and use of the measuring apparatus as referred to in paragraph (1)(b); and
(c) in the case of a measuring apparatus set out in an item of column I of the table to this section, for the period set out in column II of that item.
Item Column I Column II Description of Measuring Apparatus Period of Validity of Certificate Electricity Measuring Apparatus 1 Volt measuring 5 years 2 Ampere measuring 5 years 3 Watt hour measuring, induction type 6 months 4 Any electricity measuring apparatus not specified in items 1 to 3 1 year Gas Measuring Apparatus 5 Linear static measuring 10 years 6 Temperature measuring, mercury thermometer 10 years 7 Any gas measuring apparatus not specified in items 5 and 6 5 years
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