= Minimizing Errors for Low-Current Measurements Using NI Hardware by National Instruments
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https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000x1AZCAY&l=en-US
Manufacturer technical article, section Shunt Ammeters versus Feedback Ammeters, Figures1–3: insertion voltage burden, shunt and connection resistance, and feedback current measurement. Its 99.8nA versus100nA example corresponds to0.2percent burden error; the adjacent published statement of2percent is an arithmetic error. No individual byline is supplied.
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