I see the irony in asking this but could use some help:
I have a very nice and very expensive Fluke 289 multimeter that I got for free from someone leaving my company. It's cool but I'll never use all of its features and it uses batteries extremely fast, especially with the backlit display. I considered replacing it with a more simple unit that won't eat batteries but seeing as how this will rarely leave a desk for small home projects, I thought that if I could convert it to use a DC wall adapter it would be great.
I keep old power adapters for things such as this but the 9V adapter I have (Fluke takes 6x AA's) is unregulated and shows 14V with no load. I found this article explaining why:
http://www.robotshop.com/media/files/PDF/unregulated-power-supply-tutorial-prt-08619.pdf
So my question is, how do I determine if this is safe for the meter and if it isn't, how would I go about determining what is?
