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Entry  Tue Apr 2 18:40:01 2019, gautam, Update, VAC, Vac failure vacFail.png
    Reply  Wed Apr 3 09:07:46 2019, gautam, Update, VAC, Vac failure vacFailOvernight.png
       Reply  Wed Apr 3 10:42:36 2019, gautam, Update, VAC, TP2 forepump replaced 
          Reply  Wed Apr 3 16:17:17 2019, Jon, Update, VAC, TP2 forepump replaced IMG_3180.jpg
             Reply  Wed Apr 3 18:35:54 2019, gautam, Update, VAC, PSL shutter re-opened 
                Reply  Fri Apr 5 01:10:18 2019, gautam, Update, VAC, TP3 forepump is also noisy 
             Reply  Tue Apr 16 22:06:51 2019, gautam, Update, VAC, Vac interlock tripped again Screenshot_from_2019-04-16_22-05-47.pngScreenshot_from_2019-04-16_22-06-02.png
                Reply  Wed Apr 17 18:12:06 2019, gautam, Update, VAC, Vac interlock tripped again Screenshot_from_2019-04-17_18-11-45.pngScreenshot_from_2019-04-17_18-21-30.png
Message ID: 14511     Entry time: Wed Apr 3 09:07:46 2019     In reply to: 14509     Reply to this: 14512
Author: gautam 
Type: Update 
Category: VAC 
Subject: Vac failure 

Overnight pressure trends don't suggest anything went awry after the initial interlock trip. Some watchdog script that monitors vacuum pressure and closes the PSL shutter in the event of pressure exceeding some threshold needs to be implemented. Another pending task is to make sure that backup disk for c1vac actually is bootable and is a plug-and-play replacement.

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