Using Ohm's Law to Calibrate a Picoammeter to 0.4 Pico-ampere Precision

Authors

Joseph Hashem, Southern Methodist UniversityFollow
Tiankuan Liu, Southern Methodist UniversityFollow
Zhihua Liang, Southern Methodist UniversityFollow
Jingbo Ye, Southern Methodist UniversityFollow

Publication Date

2011

Abstract

We present an experimental method based on Ohm’s Law to calibrate the Keithley 6485 picoammeter with the calibration error less than 0.4 pico-ampere (pA), which is specified as the highest sensitivity of this instrument. The maximum calibration difference between the measurement current and the calibration current in the picoammeter’s 2 nano-ampere (nA) range is 0.25 pA. This difference is far less than the highest accuracy, 0.4 pA, specified by the instrument. Measurement errors are estimated and discussed.

Document Type

Article

Keywords

undergraduate research, natural sciences

Disciplines

Physics

Extent

9 pages

Format

.pdf

Rights

All rights reserved.

Source

Hashem, Joseph; Liu, Tiankuan; Liang, Zhihua; and Ye, Jingbo, "Using Ohm's Law to Calibrate a Picoammeter to 0.4 Pico-ampere Precision" (2011). American Journal of Undergraduate Research, vol. 10, no. 1.

Language

English

Recommended Citation

Hashem, Joseph; Liu, Tiankuan; Liang, Zhihua; and Ye, Jingbo, "Using Ohm's Law to Calibrate a Picoammeter to 0.4 Pico-ampere Precision" (2011). American Journal of Undergraduate Research, vol. 10, no. 1.