[Hallb-engineering] DC R2 pressure and Helium Buffer dewar problems

kashy at jlab.org kashy at jlab.org
Sun Dec 5 08:19:52 EST 2010

Hi I got a page last night ~ midnight from the counting house on DR R2
pressure tickling the .03 low alarm. I asked them if they had checked long
term range of this pressure. The answer was no. I asked if the DC was
operating normally, the answer was yes.
I check the LOLO value of the alarm it is .01 so I had them put the LOW
value to .015

George or Denny, Please check out the system if we need to make this
change permanent or fix something else.

After 3am I got another page on the LHe dewar. The IOC had crashed and the
shift guys could not get it going. I talked them through it. This was the
second crash in less than 24 hrs. Why? And we need to get the proper
values in the reboot script. Earlier when this happened I saved the proper
settings, but when we do a restore they do not come back properly.


More information about the Hallb-engineering mailing list