From guo at snf.stanford.edu Sat Oct 28 05:05:10 2000 From: guo at snf.stanford.edu (guo at snf.stanford.edu) Date: Oct 28, 2000 5:05:10 PM Subject: Problem metalica: rough pump Message-ID: The roughing pump of the Metallica shut down twice. T`Eric restarted the pump the first time. The chamber is not pumped down currently. From ericp at snf.stanford.edu Mon Oct 30 09:36:47 2000 From: ericp at snf.stanford.edu (ericp at snf.stanford.edu) Date: Oct 30, 2000 9:36:47 AM Subject: Comment metalica: RP ok- observations Message-ID: I reset the rough pump for George, and apparently it tripped again. The first time it tripped, it was hot when he told me about it, so it likely tripped while he was using it. That could also be the case the second time, but I wasn't here. Things I've noticed: The oil demister had a lot of oil in it (about a pint, and there's still more in there). We increased the pump ballast from about 100 mT to 300mT with the new pump. New pump was installed about a month ago. Pump oil level was fine. So, I drained some oil from the demister, lowered the ballast back to 100-120 mT, and reset it a second time. I put it through several pumpdowns from atmosphere with no trip, and then let it run. Still no trip. So it seems to be running ok. Maybe the user was opening the roughing valve too fast (??). Perhaps that could cause oil to "slug" into the demister, and cause an overlaod to trip the breaker (??). Unrelated note: I noticed that the power supply (for the sputter guns, upstairs in the lab) is making noise. It sounds to me like the cooling fan. This is external to the supply, and we could probably get a backup fan ordered fairly easily. Everything seems ok as of 09:30 on Monday, so for now maybe we should just keep a close eye on it. Some users are scheduled for today, so we should be able to see if it is ok or not. -Eric From narya at snf.stanford.edu Mon Oct 30 10:30:29 2000 From: narya at snf.stanford.edu (narya at snf.stanford.edu) Date: Oct 30, 2000 10:30:29 AM Subject: Problem metalica: Metallica : Silver paste is almost finished Message-ID: From king at snf.stanford.edu Mon Oct 30 12:42:56 2000 From: king at snf.stanford.edu (Robin King) Date: Mon, 30 Oct 2000 12:42:56 -0800 (PST) Subject: Problem metalica: Metallica : Silver paste is almost finished Message-ID: I think the last person just moved the good container to another position because the same thing happened a few months ago. The container was found underneath the machine with the top open. For some reason people are not remembering to put things away or clean up after themselves. Robin On 30 Oct 2000 narya at snf.stanford.edu wrote: