There was a lightning storm recently and the silly Arc Fault Circuit Interrupters in my house tripped off the power in most all the bedrooms, except the room my desktop was in. And so the UPS tanked, because the batteries are old and lose their charge very quickly. The graphs are logged using Cacti, and using a template/polling logic that I built using the mysql-cacti-templates project.
I really should replace the batteries in this guy (freaking sweet UPS by the way, highly recommended) so he’ll last more than a few minutes.
A friend of mine did a bit more controlled test of his UPS and here’s his blog post with graphs also.
I have zoomed the graph a bit more to get more detail on the last 20 minutes of my servers uptime.
I find it interesting that the UPS temperature actually dropped when the thing was on batteries. I remember reading somewhere that the fan only runs when the inverter is actually active, so I guess that would make sense. I also find it interesting that the input frequency never changed, perhaps the UPS only records that value once every now and then, and doesn’t update it. I would think that with 0 input voltage I wouldn’t have any measurable frequency either.
I wonder if I could/should get those AFCI breakers replaced. They tend to not keep my computers on when there’s a lightning storm, and the only way to turn them back on is to go into the garage and flip it by hand.
