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 <tmical...@gmail.com> 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 <randyevans2...@gmail.com> > 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 -- volt-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > and follow the instructions there. > > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.