Application of a calorimetric thermal converter as a standard of AC-DC voltage and current transfer difference

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Proceedings titleVIII Semtro (8th International Seminar on Electrical Metrology)
Conference8th International Seminar on Electrical Metrology (VIII Semetro), June 17-19, 2009, João Pessoa, Brazil
SubjectAC-DC transfer standard; termal converter; calorimetric converter; transmission line
AbstractAt the National Research Council of Canada (NRC) the primary standard of AC-DC transfer difference at frequencies from 10 kHz to 100 MHz is a Calorimetric Thermal Voltage Converter (CTVC). Because of a simple design, not unlike a coaxial calorimeter for RF power measurements, its frequency characteristic can be estimated theoretically from a number of mechanical and electrical parameters. An internal Tee, integrated into the CTVC, improves calibration accuracy of working standards. Over the years several of these converters have been manufactured for different operating voltages and with different frequency characteristics, leading to an optimized design with a frequency characteristic practically flat over eight decades of frequency. The paper describes details of construction of the CTVC. Results of RF-DC voltage transfer difference measurements, AC-DC current transfer difference and uncertainty evaluation of the converter are discussed.
Publication date
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedYes
NPARC number18116651
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Record identifier0ab19ad8-cc5f-4595-b321-13ff4f568762
Record created2012-03-09
Record modified2016-05-09
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