A Direct Reading Voltage Divider with Standard Cell Reference

Abstract

A highly accurate Direct Reading Voltage Divider has been developed in which the output voltage is equal to that of a standard cell when the input resistance has been adjusted so that 1 ma of current is flowing through the divider. The range of measurement with direct reference to a standard cell is from 2 to 1100 v. The range may be lowered to 0.02 v with decreased accuracy by the use of a Lindeck potentiometer in place of the standard cell. The stability, repeatability and calibration accuracy of the divider have been evaluated. Results indicate that accuracies of approximately 0.005 per cent may be obtained from 2.0 v to 1100 v without applying corrections. Design, evaluation and certification of the divider will be discussed.