BS 3145 78th Edition, June 30, 1978
Specification for Laboratory pH meters
Includes all amendments and changes through Reaffirmation Notice , February 1, 2012
Additional Comments: INCLUDES AMENDMENT 1
Published By:British Standards Institution (BSI)
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.