BSI - BS 5164
Specification for Indirect-acting electrical indicating and recording instruments and their accessories
|Publication Date:||28 February 1975|
|ICS Code (Measurement of electrical and magnetic quantities):||17.220.20|
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.