منابع مشابه
CCE 92-05 intercomparison of ac-dc voltage transfer standards at high frequencies (1-50 MHz)
From August 1995 to May 1998, the CCE 92-05 intercomparison of ac–dc voltage transfer standards at high frequencies was carried out. Two travel standards were measured by 15 national standards institutes. The results in the frequency range from 1 to 50 MHz show a good agreement between the majority of participants. The span of the majority of the reported ac–dc differences at 50 MHz is less tha...
متن کاملCalibration of Ac-dc Voltage Transfer Standards at Inmetro
The aim of this work is to present the AC-DC transfer calibration system of Voltage and Current Laboratory (Latce) of brazilian's Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro). Latce is responsible for the realizations of both the volt and the ampère in accordance to SI, and for it's dissemination through the network of accredited laboratories in Brazil, so as ...
متن کاملAc-dc Current Transfer Standards and Calibrations at Nrc
This paper describes efforts undertaken to upgrade ac-dc current transfer standards and calibrations at the National Research Council of Canada. The ac-dc current transfer comparator has been redesigned, using guarding techniques most advantageous for the current shunt comparisons. A set of coaxial shunts for currents between 10 mA and 10 A has been built, and characterized up to 100 kHz by a s...
متن کاملThermal Converters as AC-DC Transfer Standards for Current and Voltage Measurements at Audio Frequencies
Thermal converters and associated equipment that are used as ac-dc transfer standards at the National Bureau of Standards for the precise measurement of current and voltage at power and audio frequencies are described. The standards and the equipment are primarily used to standardize a-c ammeters and voltmeters submitted to the Bureau for certification. The ac-dc transfer may be made with these...
متن کاملThermal AC voltage standards with calculable AC-DC transfer difference in frequency range from 10 kHz to 1 MHz
Because Republic of Poland does not have its own primary AC voltage standard, we have been developing a set of standards which in the future can serve as national primary AC voltage standard. The set is composed of three standards with nominal input voltages UN of 1.5 V, 3 V and 6 V, respectively. The set covers AC voltage range from 0.7 V to 6 V. The voltage range will be extended to 0.5 ... 1...
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ژورنال
عنوان ژورنال: IEEE Transactions on Instrumentation and Measurement
سال: 1993
ISSN: 0018-9456
DOI: 10.1109/19.278530