EEVblog uCurrent - Precision nA Current Measurement Assistant

An essential companion when working on a ultra-low-power projects! If you've ever used a portable multimeter (even your $300 Fluke!) to measure sub-uA currents - say for a low power microcontroller or sensor project - you may notice that you're not getting the precision you expect, or that your project is acting finicky.How is this possible? – It’s called Burden Voltage. Many people are aware of Burden Voltage, but few people are aware of how bad this effect can be in practical circuit current measurements with a multimeter. Don't believe it?, take this simple test with your multimeter: