As it turns out, one of the guys visiting the site was able to pull the 
power supply and remove the battery pack to take pictures. There are indeed 
seven 2V, 5Ah cells (Enersys/Hawker Cyclon-X 0800-0004) wired in series. There 
is severe corrosion on a couple of the cells, and a new batch will be 
obtained.

    Still interested in any way to bypass the low-battery shutdown.

On Mon, 6 Jun 2022, Mike Loewen wrote:

>   The power supply on the Series 30, along with the 39/40/42/44/48 has a 
> battery pack (31000-60001) listed in the CE Handbook as 14V, 5AH for memory 
> backup. If the battery voltage drops below 12.5 volts, the memory supply 
> voltages are cut off.
>
>   I don't have access to the Series 30 at the moment. Does anyone know what 
> kind of battery is in the pack? Lead-acid? The Series 37 uses a pack made up 
> of 3 Hawker-Cyclon 2V, 2.5AH D-size lead-acid cells. Maybe the 31000-60001 
> pack is made up of individual cells?
>
>   I see that Cyclon has a 2V, 5AH battery (0800-0004): 7 of these would give 
> us the 14V needed.
>
>   Is there a way to bypass the memory supply shutdown on these systems?
>
>   I'll be working on the Series 30 again in 2 weeks. I'd like to get a jump 
> on the battery issue before then. Last time I worked on it, all the voltages 
> looked good, except for the memory supplies. I suspect a dead battery.
>
>
> Mike Loewen				[log in to unmask]
> Old Technology				http://q7.neurotica.com/Oldtech/
>
> * To join/leave the list, search archives, change list settings, *
> * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
>

Mike Loewen				[log in to unmask]
Old Technology				http://q7.neurotica.com/Oldtech/

* To join/leave the list, search archives, change list settings, *
* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *