Title :
An automated guarded bridge system for the comparison of 10 kΩ standard resistors
Author :
Dziuba, Ronald F. ; Kile, Lisa L.
Author_Institution :
Div. of Electr., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
An automated guarded resistance bridge has been specifically developed at the National Institute of Standards and Technology (NIST) for the calibration of high-quality 10 kΩ standard resistors. The system is designed to compare up to 30 nominally equal, four-terminal resistors with a resolution and combined relative standard uncertainty of 0.01×10-6 and 0.02×10-6, respectively. It features a self-balancing detector circuit, and a programmable coaxial connector switch for selecting resistors. With a few minor modifications, the system is capable of comparing other nominally equal resistors in the range 100 Ω to 1 MΩ
Keywords :
automatic test equipment; bridge circuits; calibration; feedback amplifiers; measurement standards; measurement uncertainty; resistors; 10 kohm; 100 ohm to 1 Mohm; automated guarded bridge system; automatic testing; calibration; combined relative standard uncertainty; computer control network; feedback network; four-terminal resistors; nominally equal resistors; programmable coaxial connector switch; resistance bridge; reversible battery supply; self-balancing detector circuit; standard resistors comparison; uncertainty sources; Bridge circuits; Calibration; Coaxial components; Computer vision; Detectors; NIST; Resistors; Standards development; Switches; Uncertainty;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
