Five Things Make a Post

[rolanni]

1. The new coffee pot has landed!

2. About a half-hour ago we had a Mystery Power Outage. My screen went dark and my computer went offline as I was typing. I wonder if this means the UPS no longer works. I wonder how I tell.

2A. The power just went down again, taking the screen and the box offline. The UPS also went offline. That's not right. Gah. I don't mean to whine, but I really hadn't budgeted for a new UPS this week.

3. When everything came back on, Open Office helpfully recovered (most of) my chapter. Go, Open Office.

4. It was 45 degrees(F) at my house today. That's not right.

5. Progress on Mouse and Dragon

10,801 / 100,000 (10.8%)

5A. The above is actually not an accurate count. I have most of two chapters outlined. I only, she said with a straight face, need to type them.

Comments

[keristor.livejournal.com]

Surges can do odd things to UPSs. They should theoretically cope, but I've found a couple (one APC, the other not) which did not handle repeated brief outages (around a quarter of a second repeated several times in a ten second period) at all well, they didn't pass the surges on but instead 'crowbar'd themselves and went offline completely until they thought it was safe again (about a minute).

Note that (a) a 500W power supply rarely actually draws 500W except possibly at startup (none of my computers, not even the big fileserver, actually draw more than 250W even with power supplies rated at 500W or more), and (b) the rating on UPS is usually 'VA' not 'Watts' (this probably makes little difference with a modern switched-mode computer power supply, but older transformer ones could take quite a bit more current than their power in Watts would imply because they were an inductive load, meaning that you needed a bigger UPS for the same nominal power rating of the PSU).