New Method for Measurement of AC Voltages Above 1V Using TVC and Voltage Divider

摘要

In this paper, a new method is introduced for AC voltage ranges that are higher than 1V by using the thermal converters. It can be used in laboratories in case of unavailability of the whole ranges of multiplier range resistors set. The introduced method depends on dividing the AC voltage of the unit under test to 1V by using AC voltage divider. The divided AC voltage is then measured using 1V thermal converter. The measured AC voltages are 10V and 30V at different frequencies. The expanded uncertainty is evaluated for the measurement results. The presented method is evaluated by comparing its obtained results and the results obtained by using the conventional thermal voltage converter, which consists of multiplier resistors, with the actual values of the AC voltages. The comparison proves that the new method is reliable and dependable for accurate measurements of AC voltages.