Im old soooo naturally I dont think old means bad. Some times old things can be better then new. So to the point. Im fixing a outboard motor for a friend, and needed a PRV. Meter. So not needing it very often. I built a D.V.A. adapter for my digital multi meter. But while looking through my garage, I found an old meter a friend bought at a flea market over 25 years ago. He couldn't get it to work so gave it to my. Back then I just put it on the shelf. It has sit there for this whole time. As I was looking for a few other things. I took another look at this meter. Even though it doesnt say its a PRV it seems to have all the features. So not being the smartest pin in the box. I thought I would joint you gents here and ask if any one knows anything about this meter. Ok I know I got a little long winded, But thats what us old guys do. The meter is a B&K electronic multi meter model 290. Any one know this meter and if it is PRV capable?