https://stream.echo6.co/videos/watch/910aa6c0-5b57-4716-aa51-903be8f65fee What's inside a vintage Fluke 5450A Resistance Calibrator used in cal labs to calibrate multimeters? Schematic: http://assets.fluke.com/manuals/5450A___imeng0000.pdf Coto reed relay: http://www.farnell.com/datasheets/1486738.pdf High Resistance measurement with a relay matrix: http://www.youtube.com/watch?v=fs2MfTW4o_Q http://www.youtube.com/watch?v=-mavHYV-H6o Forum: http://www.eevblog.com/forum/blog/eevblog-544-fluke-5450a-resistance-calibrator-teardown/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/ Wed, 10 Jun 2026 08:36:05 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/910aa6c0-5b57-4716-aa51-903be8f65fee All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.