Covers instruments having moving index, digital, binary coded decimal and recorded outputs. Specifies the scale, maximum permitted overall error and errors arising from 12 sources, electrode input sockets, temperature compensating devices, adjustment controls, and information to be provided by the manufacturer. Test methods for assessing electrical performance. Cross References:BS 1647BS 2586BS 3693:Part 2BS 4410BS 4743BS 4889CP 1003