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.

started flow to solenoid in parallel cold return.

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.

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.

shuttting down the system. isolated cold box by closing v135. preparing to 
pump out cold box.

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.

switched to parallel cold return

CV155 closed.
Temps about 15K

Changed to series mode.
Liquid level building.

Started flow to power leads.
Liquid level 15%

Solenoid is cold, liquid level is 35%, power leads cold and seem stable.
Added one bottle helium to buffer tank. Pressure is 7 psi..

power leads warming. closed HIC 142, then re-opened. temps falling

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.

LI108 indicates high on EPICS screen (150%)  Controller shows ~64%

I would have made an entry when it died, but-----

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.

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.

test

Solenoid Quenched on C1 temp. It went above 5K. Shut off compressor. 
Restarting system @ 12:15