From meed@mbari.org Fri Jul 2 18:47 PDT 1993 Received: from hp850.mbari.org by otter.mbari.org with SMTP (16.6/15.6) id AA06379; Fri, 2 Jul 93 18:47:25 -0700 Return-Path: Received: by hp850.mbari.org (15.11/15.6) id AA14093; Fri, 2 Jul 93 18:44:04 pdt Received: by hp850.mbari.org (15.11/15.6) id AA14090; Fri, 2 Jul 93 18:44:01 pdt From: Ed Mellinger Subject: Power Can Test To: kiwi@hp850.mbari.org (William Kirkwood) Date: Fri, 2 Jul 93 18:44:00 PDT Cc: meed@hp850.mbari.org (Ed Mellinger), neji@hp850.mbari.org (Jim Newman) Mailer: Elm [revision: 66.25] Status: RO Hi Bill - Thought you might be interested to know, I ran the power rack at full power all afternoon inside the plastic tube. This was after rigging up the filter board air dams. Things look quite good thermally. In the plastic tube the hot spot temperatures ran ten degrees hotter than what I want to see in the metal tube, so I expect in the metal tube things should run quite cool indeed. The air flow seemed to go just as we planned, around the end of the air dam and back down over the filter board. From the behavior of the Low Power Switch board I know that some air must have been flowing out of the backplane and over it, too. The total temp rise of the air was about 15 deg. during 1 circuit of the tube; all of that was lost during the brief passage thru the end bell. It took about 2 hours for the internal temperatures to stabilize. So, I think we are in pretty good shape thermally on the DC side of the power can; that leaves us just electronic and mechanical problems to worry about! And the AC side to look forward to, of course. -Ed