A TEST TO MEASURE THE EFFECT OF SELF-HEATING ON THE SCALE FACTOR OF A MEASURING SYSTEM FOR HIGH DIRECT VOLTAGE BASED ON A RESISTOR DIVIDER

摘要

Unless the temperature of the divider is controlled, the dominant contribution to the uncertainty of resistor dividers used to measure high direct voltage is usually self-heating. This paper presents a simple test which can be used to estimate the change in scale factor caused by self-heating and the uncertainty in this estimate.