Title :
New ac-dc transfer step-up calibration and uncertainty calculation in PTB and INTI
Author :
Klonz, M. ; Laiz, H.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
In PTB and INTI new ac-dc voltage transfer standards are built for the voltage range of 0.1 V to 1000 V and the frequency range of 10 Hz to 1 MHz. PMJTC (Planar Multijunction Thermal Converters) and coaxial voltage dropping resistors are used in the step-up procedure for the different voltage levels. For voltages >100 V new planar resistors are used to guarantee voltage independence of the ac-dc transfer difference. The high sensitivity of the PMJTC allows big steps in the step-up calibration and many steps inbetween which leads to an overdetermined system to check the validity of the assumptions used in the step-up. The uncertainty budget for the different voltage levels is calculated.
Keywords :
calibration; measurement uncertainty; transfer standards; INTI; PMJTC; PTB; ac-dc transfer standard; coaxial voltage dropping resistors; overdetermined system; planar multijunction thermal converters; planar resistors; sensitivity; step-up calibration; uncertainty budget; uncertainty calculation; Analog-digital conversion; Calibration; Coaxial components; Dielectric loss measurement; Dielectric losses; Frequency; Measurement standards; Resistors; Uncertainty; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.851097
