Accurate self-checking digital teraohmmeter

Author

Chen, Gene C C ; Lin, Winifred Y C ; Hsu, Jimmy C M ; Tsao, S. Hoi

Author_Institution

Center for Meas. Standards, Nat. Meas. Lab., Hsinchu, Taiwan

Volume

44

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

192

Lastpage

195

Abstract

We describe a digital teraohmmeter achieving state-of-the-art linearity, stability, and accuracy. Proper shielding, guarding, and measurement reproducibility having been addressed by hardware design, the instrument employs automatic self-checking circuits and routines to help maintain a linearity of 50 ppm when working over 10⁶-10 ¹² Ω in resistance, 1-1000 V in test voltage, and 1 pA-1 μA in test current. It can measure high-resistance standards up to 10¹⁵ Ω with a standard uncertainty not exceeding 100 ppm after a traceable calibration of its internal reference at the 1-MΩ level. In a laboratory, an annual calibration should suffice

Keywords

computerised instrumentation; digital instrumentation; electric resistance measurement; measurement standards; ohmmeters; shielding; stability; 1 Mohm; 1 pA to 1 muA; 1 to 1000 V; 10¹⁵ ohm; 10⁶ to 10¹² ohm; accuracy; annual calibration; automatic self-checking; guarding; high-resistance standards; internal reference; laboratory; linearity; measurement reproducibility; self-checking digital teraohmmeter; shielding; stability; standard uncertainty; traceable calibration; Automatic testing; Calibration; Circuit stability; Circuit testing; Current measurement; Electrical resistance measurement; Hardware; Linearity; Measurement standards; Reproducibility of results;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.377807

Filename

377807