 Thu Nov 3 06:19:50 2005, Doug Preddy, Quench Recovery, restart system
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Last night at about 7:00 there was a large power bump that shut the
compressor and water pump off. I came in this morning and am restarting the
system. |
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Thu Nov 3 09:27:16 2005, Doug Preddy, Quench Recovery, started flow to solenoid
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started flow to solenoid in parallel cold return. |
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Tue Nov 15 07:25:10 2005, Doug Preddy, Normal Running, power supply problem
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Saturday November 12 the solenoid power supply ramped itself down to zero.
It would not ramp up unless the ramp rate was set to 30 minutes. At this
setting the power supply ramped up to the required current. It seems to
ramp slower than the 30 minute rate. Klaus also looked at the problem. His
suggestion is to exercise/clean the switches and pots. |
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Mon Dec 12 09:24:29 2005, Doug Preddy, Quench Recovery, Solenoid Quench on power lead temp
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The solenoid tripped on power lead temps at about 9:15. I am recovering it
from it's all around mode into parallel cold return. |
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Thu Dec 22 15:10:44 2005, Doug Preddy, Shut Down, shut down system
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shuttting down the system. isolated cold box by closing v135. preparing to
pump out cold box. |
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Tue May 23 08:44:28 2006, Doug Preddy, Start Up, Started turbines
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Solenoid and cold box were pumped out last Tuesday. Cold box roughing pump
initially would not start. had to retighten all wires on the contactor in
the Sulzer control panel (RP900).
Started compressor on Friday. ran purifier over the weekend.
Started flow in parallel warm return. Started flow to turbines.
Replacing dead monitor on other control computer. |
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Thu May 25 07:34:18 2006, Doug Preddy, Start Up, switched to parallel cold return
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switched to parallel cold return |
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Fri May 26 07:29:54 2006, Doug Preddy, Start Up, CV155 closed
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CV155 closed.
Temps about 15K |
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Fri May 26 08:45:38 2006, Doug Preddy, Start Up, Changed to series mode
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Changed to series mode.
Liquid level building. |
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Fri May 26 10:03:03 2006, Doug Preddy, Start Up, Started flow to power leads
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Started flow to power leads.
Liquid level 15% |
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Fri May 26 14:34:24 2006, Doug Preddy, Start Up, Ready to run
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Solenoid is cold, liquid level is 35%, power leads cold and seem stable.
Added one bottle helium to buffer tank. Pressure is 7 psi.. |
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Tue May 30 14:36:41 2006, Doug Preddy, Normal Running, power leads warming
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power leads warming. closed HIC 142, then re-opened. temps falling |
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Tue Jun 13 10:54:27 2006, Doug Preddy, Quench Recovery, Compressor tripped off
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No indicator lights etc as to why the compressor tripped. The only light
was a cold box fault. I had to shut off the main breaker before the
compressor would come back on.
Started cooling in parallel cold return. |
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Fri Jun 16 08:12:04 2006, Doug Preddy, Normal Running, LI108 indicates high on EPICS screen
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LI108 indicates high on EPICS screen (150%) Controller shows ~64% |
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Fri Jun 30 11:13:00 2006, Doug Preddy, Normal Running, E-log is back up and running
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I would have made an entry when it died, but----- |
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Fri Jun 30 11:17:57 2006, Doug Preddy, Normal Running, Solenoid recovered
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Tuesday night. June 27, 2006, the solenoid quenched for no apparent
reason. It was restarted Wednesday morning. The vacuum in the solenoid
went away (up to 8 Torr). This was found to be a result of a leaking
isolation valve between the solenoid and T2. T2 was vented, which caused
the solenoid to slowly vet. When T2 was pumped out again, the solenoid
vacuum recovered. This caused a delay in recovering the solenoid. As of
Friday morning 7:15 the solenoid power supply was ramped up. |
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Mon Jul 3 23:01:34 2006, Doug Preddy, Quench Recovery, power lead warming/ripples caused quench
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power lead warming/ripples caused quench at 18:45 today. Compressor stayed
on, but flow to solenoid stopped.
I started flow to solenoid at 22:40. |
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Thu Jul 6 15:00:15 2006, Doug Preddy, Normal Running, test
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Thu Jul 6 15:04:17 2006, Doug Preddy, Normal Running, test 
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test |
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Thu Jul 20 00:25:16 2006, Doug Preddy, Quench Recovery, Solenoid quenched @ 11:15
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Solenoid Quenched on C1 temp. It went above 5K. Shut off compressor.
Restarting system @ 12:15 |