'Normal' calibration is a performance check and adjustments as required Performance checks are applying stimulus and checking instrument response is within the acceptable range.
A Full calibration is adjust each parameter to as close as practicable to ideal value and may include new cal constants and is generally far more expensive than a normal calibration Content by Scott Typos by Siri > On Feb 12, 2016, at 3:14 PM, Joseph Gray <jg...@zianet.com> wrote: > > I sent my HP 3457A in for cal. I should be getting it back next week. > I won't mention where I sent it, but it wasn't Keysight (I don't like > that name). I recently changed the SRAM battery and purposely did not > save the cal constants. I bought the meter second hand and it wasn't > in spec when I bought it. I didn't care what the past data was. > > The service manual lists an entire sequence of procedures for > calibrating this DMM, starting with storing values for zero and full > scale into the SRAM. All of this is done via the front panel, by > pushing buttons. > > I just found out that this part of the procedure is not normally done > (at least by the lab I sent the DMM to). With no pre-existing cal > constants, the tech I spoke to was rather annoyed that he was having > to spend the time doing the hookups and pushing buttons for each > function and range to store the zero and full scale values. I was told > this added an extra hour to the normal procedure. > > Not knowing what is normally done in the cal lab, I assumed that the > entire procedure as listed in the service manual would be done. It > seems that I was wrong. > > In the end, the lab decided not to charge me for the extra time > involved. I thanked them for that. > > My question is, do any cal labs (including Keysight) normally perform > the zero and full scale procedures as listed in the service manual? > > Joe Gray > W5JG > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
