Title :
Behavior and frequency dependence of AC-DC high voltage transfer standard under humidity step changes
Author :
Liu, Ling Xiang ; Chua, Sze Wey ; Ang, Chee Kiang
Author_Institution :
Stand., Productivity, & Innovation Board, Nat. Metrol. Centre, Singapore, Singapore
fDate :
4/1/2003 12:00:00 AM
Abstract :
AC-DC difference from different type of AC-DC transfer standards placed under step humidity change conditions were measured at 200 V, 600 V, and 1 kV in the frequency range from 40 Hz to 100 kHz. The measured results have shown that the humidity affects the AC-DC difference of a high voltage AC-DC transfer standard significantly at high frequencies and that a first order differential equation can be used to model the behavior. The humidity coefficients of the model are found to be frequency dependent and the time constants are related to the change of the humidity. Furthermore, the humidity effect was also found to be device dependent due to the construction of the range resistor. It will imply consequences for the measuring procedures of further international comparisons in the field of AC-DC transfer.
Keywords :
humidity; thermoelectric conversion; thermoelectric devices; transfer standards; voltage measurement; 1 kV; 200 V; 40 Hz to 100 kHz; 600 V; AC-DC difference; AC-DC high voltage transfer standard; first order differential equation model; frequency dependence; frequency dependent humidity coefficients; frequency range; humidity step changes; measuring procedures; range resistor; Differential equations; Frequency dependence; Frequency measurement; Humidity measurement; Measurement standards; Productivity; Resistors; Springs; Technological innovation; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2003.811566