Hi Ed, The type of cell you have is an UNsaturated type. These types are portable. The saturated type of cells are non-portable and very temperature sensitive requiring the use of a constant temperature enclousure.
Here is a web site that describes these devices that is quite good: http://conradhoffman.com/stdcell.htm Bill....WB6BNQ ed breya wrote: > I just junked out a very beat up old Fluke 803 differential > voltmeter, and found deep within, an old-school Cd/Hg standard cell. > It was well protected in an aluminum box, and wrapped in foam and > foil. It looks brand-new, and still measures around 1.018... V. I'd > like to keep this one as another reference point if it's still good. > I assume that it just wasn't used much, or that the Fluke circuits > were very good at not loading it down. > > I'm sure it is the original unit installed in the instrument - marked > 5/12/1960. It is a Muirhead D-845-C. There's no test voltage tag or > any other info but a serial number. > > So, I'm wondering if a 52 year old standard cell can still be OK, and > if anyone knows the specs on these, or where to find the info. I > don't know if it's possible, but I'd like to find what the official > voltage was supposed to be to a few more digits resolution. I think > various types and brands each had slightly different nominal voltages > around that determined by the basic chemistry. I remember in the old > days, every one I saw included a sticker with the 25 deg C exact > voltage measured as accurately as possible back then against the NBS. > I'd like to especially know if this is a saturated or unsaturated cell type. > > Ed > > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
