Interesting video. His 'cal certificate' shows no data other than 'in tolerance' and the 'standards' used to established that.
He also makes a point of the 'calibration counter'. On the 3458A that I was able to 'kill' the 'cal RAM', the 'cal counter' was at '1' when I received it. When I finished doing my 'home cal' on a 'blank' 'cal RAM', the 'cal counter' was about 20 or so. It appears that every measurement that is calibrated increments the 'cal counter'. I don't recall how many ranges the 3457A has but add them all up and that is what I would expect the 'cal counter' to increment by once you finish a 'home cal'. Since Agilent does all this via HPIB (at least that's what I think), it increments the 'cal counter' only by '1' step. I would opt for a 'cheaper' 'seems to be working' 3457A then send it to Agilent for their calibration rather than spend extra for someone else's calibration. Joe WB4BPP -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Joseph Gray Sent: Monday, August 19, 2013 8:20 PM To: Discussion of precise voltage measurement Subject: [volt-nuts] HP 3457A calibration? Recently, we were discussing where to get a DMM calibrated. Someone mentioned an ebay seller in Albuquerque who had their meters calibrated across town by a company with a similar name. I am currently watching a YouTube video about the HP 3457A. At around 7 minutes, take a look at the calibration certificate when he holds it up. http://www.youtube.com/watch?v=HfxpJCdgVwc Joe Gray W5JG _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
