Title :
High-precision AC-DC transfer standards at ETL
Author :
Sasaki, Hitoshi ; Takahashi, Kunihiko ; Klonz, M. ; Endo, Tadashi
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
4/1/1993 12:00:00 AM
Abstract :
A new measurement system is developed in order to re-evaluate the present AC-DC transfer standards of the Electrotechnical Laboratory (ETL). The measurement system consists of a high-precision comparator system and a modified fast-reversed DC source. The AC-DC transfer differences of thermal transfer standards are compared using the comparator system with a resolution better than 1 ppm. The absolute AC-DC transfer differences of single-junction thermal converters (SJTCs) are evaluated in term of a multijunction thermal converter and by the modified fast-reversed DC method. The results obtained by the two methods agree within 1 ppm
Keywords :
comparators (circuits); measurement standards; voltage measurement; AC-DC transfer standards; ETL; Electrotechnical Laboratory; digital voltmeter; high-precision comparator; single-junction thermal converters; Analog-digital conversion; Assembly; Frequency estimation; Inspection; Laboratories; Measurement standards; Standards development; Switching converters; Voltage; Watthour meters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
