Title :
Automated high-value resistance calibration up to 1 PΩ
Author :
Schumacher, B. ; Melcher, J.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
For several years, a high-value resistance measurement system of the modified Wheatstone bridge type is in operation at PTB. It is used for calibration of resistors with values in the range from 1 GΩ to 100 TΩ. Recently, the guarding and grounding of the bridge has been optimized to reduce measurement times and noise. This has enabled us to extend the range for calibration to 1 PΩ. The new guard and ground scheme is described and measurement results are presented together with an estimation of the achievable measurement uncertainty.
Keywords :
calibration; electric resistance measurement; measurement uncertainty; optimisation; PTB; automated resistance calibration; bridge grounding; bridge guarding; measurement noise reduction; measurement uncertainty; modified Wheatstone bridge; optimization; resistance 1 Gohm to 100 Tohm; resistance measurement system; Bridge circuits; Calibration; Detectors; Dielectric measurements; Electrical resistance measurement; Noise measurement; Parasitic capacitance; Resistors; Time measurement; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5543482
