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Entry  Tue Aug 8 17:04:26 2017, Steve, Update, VAC, unintended pump down pumping_down.png
    Reply  Tue Aug 8 17:44:11 2017, Steve, Update, VAC, unintended pump down stopped_pumping.png
       Reply  Wed Aug 9 11:59:51 2017, Steve, Update, VAC, unintended pump down at vacuum normal pdc.pngpd80b@vacnormal.png
          Reply  Thu Aug 10 15:45:34 2017, Steve, Update, VAC, accidental vent to 17 Torr Mag_UPS.jpgUPSbatteryPack.jpgclosing_V1.jpg
             Reply  Mon Aug 21 16:35:48 2017, gautam, Update, VAC, UPS checkup 
                Reply  Wed Aug 23 10:11:46 2017, Steve, Update, VAC, vacuum valve specifications 
                   Reply  Tue Aug 29 15:35:19 2017, Steve, Update, VAC, vacuum pump specifications & manuals 1759489_995814a9-55c1-4fa1-b333-f446d272c1cc.jpg
Message ID: 13175     Entry time: Wed Aug 9 11:59:51 2017     In reply to: 13172     Reply to this: 13186
Author: Steve 
Type: Update 
Category: VAC 
Subject: unintended pump down at vacuum normal 

pd80b has reached Vac Normal. IFO pressure 0.5 mTorr

We need our vauum channels back in dataviewer.

Quote:

Pumpdown stopped for over night  at ~  1 Torr

The roughing line disconnected.  Valves condition indicator  "moving " means that it is closed and it's cable disconnected so it can not move.

The RGA is off and VM1 is stuck.

Quote:

IFO pressure 2 Torr,    PSL  shutter closed.  I'm pumping down with 2 roughing pumps with ion pump gate valves open and annulosses at atm.

The vacuum envelope was vented to 17 Torr while I was replacing the USP battery stack. More about this later.....

Do not plan on using the interferrometer tonight.  I will complete the pumpdown tomorrow morning.

 

 

 

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