Analysis of a dual-balance high-resistance bridge at 10 TΩ

Author

Jarrett, Dean G.

Author_Institution

Electr. Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA

Volume

50

Issue

2

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

249

Lastpage

254

Abstract

The NIST guarded active-arm bridge, using a third DC source and a second detector to balance the guard network, is described. Improvements to the NIST active-arm bridge and the design and construction of improved high resistance standards have facilitated the extension of NIST calibration services to the 10 TΩ decade of resistance. The 10 TΩ calibration service has been offered as a special test for NIST customers; the 100 TΩ special test will be available later this year. To ensure the quality of the measurements provided to the customer and to evaluate the bridge, many verifications including the use of check standards, redundant measurement systems, and multiple bridge ratios have been used. Analysis techniques described for the 10 TΩ decade of resistance can also be applied to the 100 TΩ decade of resistance

Keywords

bridge circuits; calibration; electric resistance measurement; resistors; transfer standards; 10 Tohm; Hamon standard; NIST guarded active-arm bridge; calibration service; check standards; dual-balance high-resistance bridge; guard network balancing; improved high resistance standards; multiple bridge ratios; programmable source; redundant measurement systems; second detector; third DC source; transfer standard; Bridge circuits; Calibration; Detectors; Electrical resistance measurement; Insulation; Leakage current; Measurement standards; NIST; Resistors; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.918114

Filename

918114