BSI BS 89-2
BS BS 89-2 1990-JAN-01 Drect actng ndcatng analogue electrcal measurng nstruments and ther accessores — Part 2 Specfcaton for specal requrements for ammeters and voltmeters
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Classification, construction, marking, electrical and mechanical requirements, and tests for analogue ammeters and voltmeters. To be read in conjunction with BS 89:Part 1