Recent content by Craig-Tx

Well, Surprise, surprise. One of my least likely contenders is the winner. I connected the batteries into parallel and connected them to the Conext UPS. Let it charge up and did a discharge test using the same light bulb as before. I didn't let it go nearly as far down, I let it run for...

Ok, this is getting out of hand. My office now has piles of UPS units (in various stages of assembly) Batteries, and meters just about everywhere... So, MinuteMan status: Works well, but I'll have to manually remove the buzzer. The software should be able to disable the alarm, but when...

Correction. They are at 27.6V now.

Update on the MinuteMan. So It's been about 2 and a half days and it's finally got the batteries up to close to the float voltage. They are at 28.7V now. It's been slowly charging at roughly .5 Amp. Which as rare as the power goes out, this isn't a real problem. I should be able to tolerate...

Update: Well, I let the MinuteMan UPS run on battery for a while, waiting for the thing to simply shut off. I'm not sure it will. I ended it this morning when I realized it had drained the batteries to 21.8V (10.9V each). (I hope I didn't badly damage my new batteries.) However, that...

It is possible that the software will allow me to disable the beeping. However, I have not been able to get the MinuteMan SentryPlus software to recognize the UPS. Apparently, while it has a USB connection, internally, it is a USB To RS232. I have a forum post on the MinuteMan website for...

So far... No. Honestly, I've never run any of these UPS units for an extended time. Until now! And it's running great! So to fill in everyone on my progress: I decided to get the two U1 batteries in my original post. I figure that would be the most versatile. I can either put them in...

Not a hijack at all. In fact, you're looking to do essentially the same thing. And while not life or death for humans, it certainly could be for those fish. I wish I could explain the 30 min. Two possibilities come to mind: 1: The output transistors are getting hot. Many smaller UPS...

I have a ResMed S9. Unfortunately it uses 24V natively. I do have the 12V power brick, and I know it will use quite a bit less power. The downside is that I would have to power the unit off the battery all the time, whereas a commercial UPS will simply connect the line voltage to the output...

Exactly. As I stated, I was shooting for at least 8 hours. The 21 hours will likely be cut in half as a lot of the power is lost in the UPS converting it back to 110 AC. Plus, I'd prefer to not drain the batteries completely, but I will to get a good night's sleep. In the winter I use the...

Ok, so I have a handful of old UPS units that I've collected over the years. Every one of them has bad or no batteries. My need: I have sleep apnea and use a CPAP. twice in the last couple of months, I've been rudely woken up by a complete lack of air due to a power outage. (Not...