Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Analysis of a Dual-Balance HIgh Resistance Bridge at 10 T{Ω}



Dean G. Jarrett


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 T{Ω} decade of resistance. The 10 T{Ω} calibration service has been offered as a special test for NIST customers, and the 100 T{Ω} 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 here for the 10T {Ω} decade of resistance can also be applied to the 100 T{Ω} decade of resistance.
IEEE Transactions on Instrumentation and Measurement


balance, bridge, detector, guard, measurement, standard, transfer standard, resistance


Jarrett, D. (2001), Analysis of a Dual-Balance HIgh Resistance Bridge at 10 T{Ω}, IEEE Transactions on Instrumentation and Measurement, [online], (Accessed June 19, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created April 1, 2001, Updated February 19, 2017