JF, Not meaning to be unfriendly, BUT this list * * IS NOT * * a "general" test equipment repair faculty.
The unit in question is a series of regulated voltage sources that are adjustable. Being adjustable means it is not absolute. Equally so, your 3458A is, likewise, adjustable and is totally dependent upon the references it was adjusted against. Besides the type of wires and corresponding thermals in your connection arrangement, you have the ambient temperature in the mix. As you state you just bought it used, how do you expect it to be perfect ? It has most likely been kicked around for a while and with no known calibration history, those values do not surprise me at all. Do you really think your 3458A is perfect ? Is your "cal lab" really up to the job ? If so, then send your new BOX to them and compare after you get it back. Your question "What is the reference of the replacement batteries ?" is ambiguous. If you meant the part number, then open it up and do the research. As for the batteries, except for mounting issues, they are just a power source for all the different regulated supplies that feed those front panel connectors. Bill....WB6BNQ JF PICARD wrote: > I am looking for the service manual of the Datron Wavetek 4910. I have just > got this reference standard from Ebay : is it normal to see 3 cells at 2 or > 3 µv under 10V and one at + 13µv (23°C with 3458A just calibrated yesterday) > or it is an obvious problem with the cell (the third one) ? What is the > reference of the replacement batteries ? Thanks. > _______________________________________________ > 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.
