In my humble opinion your are best off first checking for a local Cal Lab with a Josephson Junction Array Voltage Standard. You can then drop it off and pick it up your 732A. I would imagine the day of abuse during shipping has more effect on uncertainty then the rest of the year combined sitting in a controlled lab environment. And Speaking of Lab environments adding precise temp and humidity control will have a substantial effect on 732A and 3458A stability. Hooking a number of small electric heaters to PID controllers can provide even out room temperature. Also I would almost always assume the 732A is more accurate then your 3458A even if you have the 002 or HFL option. Has anyone attempted changing the battery technology to Li-Ion and redesigning the charger? I am sure you could get greatly improved battery life.
Thomas Knox > From: [email protected] > To: [email protected] > Date: Sat, 8 Mar 2014 07:50:55 -0600 > Subject: Re: [volt-nuts] A Fluke 732A: Return it or keep it? > > Charles, > > Thanks for the info on batteries. I agree, some are definitely better than > others. However, I'm no 'connoisseur' of batteries yet. The 732A I got was > 'unknown working condition' and I wanted the cheapest batteries I could find > to test the unit and see if I could get it up and running. So far, it looks > good. > > Do you wind up having to re-solder some of the battery wires in the battery > module in order to use the 12 V 5 AH batteries or will they just swing to > the other side since it appears that the (+) and (-) terminals will wind up > on the same side, instead of opposite sides with the 6 V 4.5 AH batteries? > > I have not faced the shipping question yet, but, as David pointed out, there > is an issue with shipping batteries. I suspect it could be shipped but > would be ground and, therefore, need a huge battery in order to get it to > the other side of the country 'hot'. I recall reading some thoughts on > current drain for the unit when on batteries but I do not remember what it > was. Clearly, it should be at a minimum, and therefore the battery should > last the longest, when already 'hot' when removed from AC power. Has anyone > done that experiment? I live in NW FL and I am not aware of Cal Labs in my > neighborhood that could do the work. Atlanta, perhaps? Does anyone have a > recommendation of a capable Cal facility 'close by' to NW FL? > > Short of sending it to Fluke or another facility, I will be limited to using > my Agilent Cal'd 3458A to 'adjust' the 732A, then 'tracking' the 732A from > year to year as the 3458A comes back from Cal. > > I paid less than Michael and more than you for my unit but it seems to work. > I have seen these sell on theBay for $450 and up. > > Joe > > > _______________________________________________ > 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.
