Caveat: been through most of the threads here and have only found the caveat/procedures for replacing the backup battery.
Despite taking proper precautions, my efforts at replacing the Lithium backup cell failed and I glitched my unit's parms. I do not mind paying for a reasonable calibration service -- $50-75 -- but I cannot seem to find anything under $125 ~~ and that's a little steep for a hobby bench unit.
That said, I have been reviewing section 4 of the HP service manual and have tried out a little bit of the Cal procedure without success. Here is what I am wondering:
(1) It is necessary to have standards or an accurate DMM (i.e., calibrated HP 3478A, etc.) measuring a stable DC supply at the 300 mV, 3 V, 30 V levels, etc., correct.
(2) There's no way one could press a voltage standard into service to measure at the standard's levels (i.e., 0.5V, 1.0V 2.5V, etc.)
(3) Similarly, I have calibrated resistances of 100, 1000, 10,000, and 100,000 ohms. Can I do a calibration them.
But I guess the biggest take-away is has anyone ever personally done the calibration procedure and can i bounce some questions off you as to how it is done.
Thanks for any help!
~Bill, k6whp