Keithley Publishes E-Handbook on Precision Low Current, High Resistance Measurements

A free copy can be downloaded from Keithley’s website at http://www.keithley.com/pr/088.

The e-handbook covers several topics crucial to ensuring low current measurement accuracy:

* Measurement circuit
* Leakage currents and guarding
* Noise and source resistance
* Zero drift
* Generated currents
* Overload protection
* AC interference and damping
* Using a coulombmeter to measure low current

Topics addressed in the e-handbook related to high resistance measurements include:

* Constant-voltage method
* Constant-current method
* Guarding
* Settling time

In addition to these topics, the e-handbook provides two measurement applications examples: avalanche photodiode reverse bias current measurements and voltage coefficient testing of high ohmic value resistors. A useful glossary of low-level measurement terminology and a guide to selecting instruments suitable for low current and high resistance measurements, such as ammeters, electrometers, and ohmmeters, are included. In addition, links are provided to a variety of webinars, white papers, and application notes relevant to each topic area.