Paragraph 7 Induction metersI1

All induction meters with more than one register shall be tested on one register in accordance with paragraphs 5 and 6 and on each and every other register at a low load using the method A, method B or method C test and at an intermediate or high load using the method A test.

For the same load conditions the maximum permitted difference between the error on one register, expressed as a percentage, and the error on any other register, expressed as a percentage, is 1 per cent.

Every register change mechanism shall be tested for correct operation with an applied voltage of 90 per cent. of the declared system voltage.