I did it time ago. Warmed up ~3 hours / Measure value with my 3548A. Next trimmed to mid of trimmable range (pot to center). Than trimmed (by shorting step by step) as close as possible to 10.000V. /PeLuLe
> Gesendet: Sonntag, 19. November 2017 um 06:51 Uhr > Von: "Jeremy Nichols" <[email protected]> > An: [email protected] > Betreff: [volt-nuts] HP-3455A calibration > > My new-to-me 3455A DVM (s/n 1622A06699) does not want to calibrate to the 10 > Volt level although 1 Volt is fine. The 10V adjustment pot in the 11177B > reference assembly simply doesn't adjust far enough—I can get the reading > down to 10.00020 Volts but no lower. > > Just for the heck of it, I picked up another reference assembly from an eBay > seller. It's an "A" assembly rather than the "B" the 3455 came with but it > works fine and I am able to calibrate both 1V and 10V. > > The reference assemblies have a set of jumpers for "coarse adjust" so it > should be possible to tweak the "B" version back into calibration. Does > anyone have experience doing this? The service manual just says "return to > the factory." It would be nice to hear from someone who has worked with these > things before I start messing with the jumpers. > > Jeremy > > Sent from my iPad 4 > _______________________________________________ > 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.
