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Entry  Tue Dec 31 23:19:58 2013, Koji, Summary, General, linux1 RAID crash & recovery 
    Reply  Thu Jan 2 10:15:20 2014, Jamie, Summary, General, linux1 RAID crash & recovery 
    Reply  Thu Jan 2 10:50:24 2014, Steve, Update, VAC, vacuum monitor is still blank Help.pngvacation.png20131220lastRGAscan.png
       Reply  Thu Jan 2 13:35:06 2014, Koji, Update, VAC, vacuum monitor is still blank 
          Reply  Tue Jan 28 11:13:50 2014, Koji, Update, VAC, vacuum monitor is still blank 
             Reply  Tue Jan 28 16:26:40 2014, Steve, Update, VAC, vacuum computers are back without safety c1vac1_vac2areback.png
                Reply  Wed Feb 5 08:14:59 2014, Steve, Update, VAC, vacuum computers are back without safety 
       Reply  Mon Jan 13 16:50:55 2014, Steve, Update, VAC, Maglev controller needs service 
          Reply  Wed Apr 2 16:34:15 2014, Steve, Update, VAC, Maglev controller needs service 
             Reply  Thu Apr 3 17:05:52 2014, Steve, Update, VAC, Maglev controller swapped loanerControllerIn.png
                Reply  Thu Apr 10 16:09:29 2014, Steve, Update, VAC, RGA scan at 75% pumping speed 520HzpumpingSpeed.png
                   Reply  Tue May 27 11:00:43 2014, Steve, Update, VAC, RGA scan at day 111 pd77d111RGA.png
                      Reply  Thu Aug 21 15:07:48 2014, Steve, Update, VAC, RGA scan at day 197 RGAscan@d197.png
                         Reply  Mon Sep 22 15:20:32 2014, Steve, Update, VAC, RGA scan at day 229 RGA@229day.pngRGAscan229d.png
                Reply  Mon Apr 21 10:14:00 2014, Steve, Update, VAC, Maglev controller serviced ourControllerBack560Hz.png
             Reply  Wed Aug 29 09:56:00 2018, Steve, Update, VAC, Maglev controller needs service 
                Reply  Mon Oct 22 15:19:05 2018, Steve, Update, VAC, Maglev controller serviced our_controller_is_back.png
    Reply  Mon Jan 6 16:32:40 2014, Koji, Summary, General, linux1 RAID crash & recovery 
Message ID: 9582     Entry time: Tue Jan 28 16:26:40 2014     In reply to: 9581     Reply to this: 9599
Author: Steve 
Type: Update 
Category: VAC 
Subject: vacuum computers are back without safety 

Quote:

[Steve Koji]

We pushed the reset button of c1vac1 and c1vac2 and the vacuum screen is back.

First, we pushed the reset button of c1vac1 and pushed the one on c1vac2.
This did not bring c1vac2 up. We pushed the reset of c1vac2 again and now everything of the vacuum screen is back.

 1, Reset works

 2, Default values are lost. They actually reversed into open and turn on everything when power recycle c1vac1, c1vac2 or 24V dc power supply. This can vent the IFO in an event of power failure!

      It's may be the time to go back to an isolated, vacuum controller only computer.

 

The present valve configuration at Atm1

a, all annuloses are vented

b, valve cables disconnected at: VC1 and 4 IP gate valves

c, the RGA is off and it is pumped by the Maglev through VM2

d, cryo pump is being roughed with TP3  It's outgassing rate was 25 mTorr / min

e, Roughing hose is disconnected

Attachment 1: c1vac1_vac2areback.png  24 kB  | Hide | Hide all
c1vac1_vac2areback.png
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