Joe I will believe they only do that procedure in a real repair. I had to do the same thing on a tek 2465b scope. O man what a complete pain in the rear and literally 8+ hours of work. So I can fully appreciate the reality that a Calibration is a check and trim for accuracy. Most likely an hour or so in total. Regards Paul WB8TSL
On Fri, Feb 12, 2016 at 3:14 PM, Joseph Gray <[email protected]> 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 -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
