Metalica: Please watch the pump line
takane at stanford.edu
Fri Jun 11 18:04:22 PDT 2010
Dear next few users,
Please watch the quick flange (QF) clamp on the roughing pump line, especially when you open/close the roughing valve. The clamp came loose once when Benny was using it yesterday and once again today when I was using it.
If the clamp comes off when you start roughing, it just wouldn't pump down so you'll notice. But I am worried that if it is not clamped and get knocked off for some reason during cryo pumping, then it's bad for cryo; so it might be best to visually check before you leave it pumping.
Just a precaution... Thanks for reading!
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