Randy, I have replaced batteries in two units so far, which I bought on ebay (6V) and they fitted absolutelly perfect, no need to rework an metal and there was o isue with shortages. So there certainly are standard 6V batteries that fit without mods. I always try to keep things in original config, if possible. Also, you do not want to adjust the 732a trimmers. It only gets unstable, if you are unlucky. I discussed this with some cal labs, same answer. What you could do is to adjust the jumper settings for coarse adjustment, if need be. Adrian
> Gesendet: Samstag, 23. August 2014 um 04:03 Uhr > Von: "Randy Evans" <[email protected]> > An: "Discussion of precise voltage measurement" <[email protected]> > Betreff: Re: [volt-nuts] 732A and Prologix received > > Todd, > > Thanks for the info. I have several Panasonic 12V 7 AH batteries that I > keep topped off and they have very low current draw (~2 to 3 mA at 13.5 > VDC) when charged and at their float voltage, so I am pretty sure they are > in good condition. I will look at getting those in the units after I > ascertain the condition of the 732. > > So now I have a what appears to be a functioning 3458A and a 732A but they > slightly disagree. I am like the man with two watches that disagree on the > time - which is correct? For the moment, i am only concerned with > stability. The need for absolute accuracy will come later. > > Randy > > > On Fri, Aug 22, 2014 at 8:06 PM, Todd Micallef <[email protected]> wrote: > > > Randy, > > > > You have two possible choices. It can be configured with 4 x 6v 4Ah > > batteries or 2 x 12v 7Ah batteries. Hopefully the previous owner has > > modified the battery pack already. A couple of mine needed a nibbler tool > > to remove enough of the aluminum cover that fits over the tops of the > > batteries. The original cover will short out to the battery tabs regardless > > of the battery configuration if this is not done. > > > > You can find larger capacity batteries that will give you slightly more > > battery life. I lost a couple sets of mail-order batteries after a few > > extended outages. I would recommend going with locally bought batteries > > instead of the cheaper mail order. My local Batteries Plus will typically > > have some warranty if I remember correctly. Moving forward I will only use > > 2 12v batteries and pre-charge them on a battery charger to equalize them > > before putting them in the 732A. I think the cheap batteries did not > > discharge equally, and would not recover when power was applied. > > > > Inspect the back plane for damaged traces and look at the capacitors. I had > > a few that looked questionable. So far, I have replaced all the big caps on > > the pre-regulator and regulator boards. My feeling is that once these go > > online, they should run as long as possible between repairs. > > > > The battery charger circuit may need adjusting. I tweaked mine and it > > seemed to work fine. > > > > Todd > > > > > > On Fri, Aug 22, 2014 at 10:42 PM, Randy Evans <[email protected]> > > wrote: > > > > > I received my Fluke 732A today. Just powered it up but it needs new > > > batteries. Any suggestions for sources (I haven't opened up the unit > > yet - > > > I want to make sure it works before doing that). Also received the > > > ProLogix USB-GPIB adapter. I plan on using Mark Sims' CAL ran data > > dumper > > > program to get the CAL data from my 3458A. Should be a busy weekend. > > > > > > Randy > > > _______________________________________________ > > > 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. > > > _______________________________________________ > 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.
