I suspect this was an inadvertent mis-post to time-nuts intended for
volt-nuts
On 4/16/2011 4:01 PM, WB6BNQ wrote:
> 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.
>
> BillWB6BNQ
>
>
> 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.
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Oz
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