General test conditions, test methods, error tests, variation tests and other tests. Contains index of tests with reference to other Parts of BS 89. To be read in conjunction with BS 89:Part 1
标准号:
BS 89-9-1990
General test conditions, test methods, error tests, variation tests and other tests. Contains index of tests with reference to other Parts of BS 89. To be read in conjunction with BS 89:Part 1
Defines and classifies accuracy classes, methods of determining intrinsic error and variations for measured quantity and time-keeping, lists influence quantities, electrical and mechanical requirements, marking requir...
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标准号:
BS 90-1975
Defines and classifies accuracy classes, methods of determining intrinsic error and variations for measured quantity and time-keeping, lists influence quantities, electrical and mechanical requirements, marking requirements and symbols. Concept used and effect of friction between marking device and chart explained in appendices.
Applies only to newly manufactured induction type var-hour meters for the measurement of reactive energy of frequency between 40 and 60 Hz, of an accuracy class of 3.0 for ordinary usage. Contains definitions, mechani...
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标准号:
IEC 60145-1963
Applies only to newly manufactured induction type var-hour meters for the measurement of reactive energy of frequency between 40 and 60 Hz, of an accuracy class of 3.0 for ordinary usage. Contains definitions, mechanical and electrical requirements and c
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