Aspects of Application and Calibration of a Binary Compensation Unit for Cryogenic Current Comparator Setups

Author

Drung, Dietmar ; Gotz, Martin ; Pesel, Eckart ; Barthelmess, Henry J. ; Hinnrichs, Colmar

Author_Institution

Phys.-Tech. Bundesanstalt (PTB), Berlin, Germany

Volume

62

Issue

10

fYear

2013

fDate

Oct. 2013

Firstpage

2820

Lastpage

2827

Abstract

We have developed a binary compensation unit for balancing measurement bridges with cryogenic current comparators (CCCs) commonly used in resistance metrology. We present the basic design ideas for the new microcontroller-operated module. It offers balance over a gapless range of resistance ratios of the resistors to be compared. The binary setup allows for convenient calibration when being combined with a binary CCC. The calibration can be performed using the CCC´s control electronics and software. Examples of measurements demonstrate the unit´s high flexibility and stability of resistance calibration well below one part in 10⁹ over a period of 21 hours.

Keywords

bridge circuits; calibration; compensation; cryogenic electronics; current comparators; electric resistance measurement; microcontrollers; resistors; CCC; balancing measurement bridge; binary compensation unit; cryogenic current comparator; microcontroller-operated module; resistance calibration stability; resistance metrology; resistor; Bridge circuit; calibration; electrical resistance measurement; precision measurement; superconducting device;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2013.2259112

Filename

6529182