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Full Description

Defines and classifies instruments using a null balance method and needing an auxiliary electrical supply. Permissible intrinsic errors, reference conditions and variations for measured quantity and time-keeping for recording instruments. Also electrical, mechanical, constructional and marking requirements.

Cross References:
BS 89:Part 1
BS 90
BS 1991:Part 6
BS 2011
BS 3693
BS 3939
BS 4727