EEVblog #894 - Keysight U1461A Insulation Resistance Multimeter Teardown

Inside the Keysight U1461A Insulation Resistance Multimeter
Forum: http://www.eevblog.com/forum/blog/eevblog-894-keysight-u1461a-insulation-resistance-multimeter-teardown/

HY3131 datasheet:
http://www.hycontek.com/attachments/DMM/DS-HY3131_EN.pdf

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