Thanks to Dr. Alan J. Fridlund for suggesting this calibration configuration.
A Low-Cost Precision Electrode Impedance Meter
Article first published online: 30 JAN 2007
Volume 19, Issue 1, pages 117–119, January 1982
How to Cite
Dunseath, W. J. R. (1982), A Low-Cost Precision Electrode Impedance Meter. Psychophysiology, 19: 117–119. doi: 10.1111/j.1469-8986.1982.tb02612.x
The author expresses his appreciation lo Edward Kelly. Ph.D. and Fritz Klein, Ph.D. for their assistance.
This work was supported by the McDonnell Foundation.
- Issue published online: 30 JAN 2007
- Article first published online: 30 JAN 2007
- (Manuscript received December 15. 1980; accepted for publication April 1981.)
- Electrophysiological recording;
A circuit is described which measures applied electrode impedances using a 7 P.A RMS, 10 Hz sine wave current, and displays the reading in ohms on a small analog meter. The design uses a minimum of parts and power, drawing only 2mA from a 9 volt battery, yet is accurate lo within 2% and can easily be modified to fit a wide range of frequencies.