[volt-nuts] 732A and Prologix received

Todd Micallef tmicallef at gmail.com
Fri Aug 22 23:06:59 EDT 2014


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.


On Fri, Aug 22, 2014 at 10:42 PM, Randy Evans <randyevans2688 at gmail.com>

> 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
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