Title :
AC-DC transfer measurements in the mV-range using discrete micropotentiometers
Author :
Geronymo, Gean ; Ribeiro-Silva, C.I. ; Souza, R.M. ; Klonz, M.
Author_Institution :
Inst. Nac. de Metrol., Qualidade e Tecnol., Rio de Janeiro, Brazil
Abstract :
This paper describes the new primary standard for the ac-dc low voltage transfer at Inmetro, based on micropotentiometers with PMJTCs and commercial current shunts. The design of the new micropotentiometers is presented, followed by the build-down of the voltage scale into the mV-ranges and the uncertainty analysis. Finally, the results of an unofficial interlaboratory comparison between Inmetro and PTB, at 20 mV, are presented and discussed.
Keywords :
electric current measurement; measurement uncertainty; potentiometers; transfer standards; voltage measurement; AC-DC low voltage transfer standard; AC-DC transfer measurement; Inmetro; PMJTC; PTB; current shunt; discrete micropotentiometer; measurement uncertainty analysis; voltage 20 mV; Calibration; Resistors; Standards; Temperature measurement; Thermal resistance; Uncertainty; AC-DC voltage difference; electrical metrology; micropotentiometer; milivolt calibration; thermoconverters;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898485
