What's inside a vintage Fluke 5450A Resistance Calibrator used in cal labs to calibrate multimeters?<br />Schematic: http://assets.fluke.com/manuals/5450A___imeng0000.pdf<br />Coto reed relay: http://www.farnell.com/datasheets/1486738.pdf<br />High Resistance measurement with a relay matrix:<br />http://www.youtube.com/watch?v=fs2MfTW4o_Q<br />http://www.youtube.com/watch?v=-mavHYV-H6o<br /><br />Forum: http://www.eevblog.com/forum/blog/eevblog-544-fluke-5450a-resistance-calibrator-teardown/<br /><br />EEVblog Main Web Site:<br />http://www.eevblog.com<br />EEVblog Amazon Store:<br />http://astore.amazon.com/eevblogstore-20<br />Donations:<br />http://www.eevblog.com/donations/<br />Projects:<br />http://www.eevblog.com/projects/<br />Electronics Info Wiki:<br />http://www.eevblog.com/wiki/
