M9sol Logbooks Solenoid Daily log
  Solenoid logbook, Page 11 of 15  ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
ID Date Authordown Operational Mode Subject
  197   Wed May 30 08:38:38 2007 Doug PreddyQuench RecoverySolenoid quenched this morning
Solenoid quenched this morning on power lead temp (I believe).
I restarted it at ~7:00, but the capacity control for the compressor would 
not respond. I shut the system back down and checked as many relays as I 
could. I then restarted the system and it is now cooling. I will go 
through the wiring diagrams and see if I can locate the bad relay.
  198   Wed May 30 11:27:32 2007 Doug PreddyQuench RecoveryProblems recovering
Various start up problems :
MV51 stuck open. Finally got it closed by hitting the valve with a hammer.
Vacuum is bad in cold box as MV902 tripped closed.
Vacuum in solenoid has gone bad. Suspect boil off from inside solenoid. So 
far it is not recovering.
Previously T1 would not spin up - frozen.
  199   Thu May 31 07:11:05 2007 Doug PreddyQuench Recoveryswitched to parallel cold return
switched to parallel cold return earlier this morning. Vacuum is 5 x 10-5.
  200   Thu May 31 11:51:49 2007 Doug PreddyQuench RecoverySwitched to series mode
  201   Tue Jun 12 12:48:25 2007 Doug PreddyMaintenanceadded one bottle UHP helium to system
  202   Thu Jun 14 00:10:10 2007 Doug PreddyQuench Recoveryrecovering from earlier quench
Solenoid quenched on power lead temperature last night at about 6:00. I 
restarted flow to the solenoid in parallel cold return. Switched to series 
mode and am building liquid. 
  203   Sat Jun 16 15:05:03 2007 Doug PreddyNormal RunningSolenoid power lead temp problem
Power lead temps rippling and increasing. I asked an operator to cycle 
HIC142. This seems to have fixed the problem (for now).
  204   Tue Jun 19 21:15:41 2007 Doug PreddyQuench RecoveryToday's quench
power lead temps caused a quench at 8:30 this morning. Recovery of system 
and flow to solenoid was started by 11:00. Solenoid was switched to series 
cold at 3:00. Solenoid and power leads were cold at ~6:30. power supply 
was to be energized by experimenters.
  205   Sun Jul 1 16:09:37 2007 Doug PreddyNormal RunningM9B:DP2 tripped off
Diffusion pump tripped off and vacuum (and power lead temps) going up. I 
had an experimentor cycle HIC 142 at 4:15 this morning. When I got in 
today I restarted the pump and it is back to 6.0 x 10-7. Power lead temps 
also are going down.
  206   Wed Jul 4 11:13:12 2007 Doug PreddyQuench Recoverytest
This is a test to make sure the e-mail works.
  207   Thu Jul 5 03:04:50 2007 Doug PreddyNormal RunningPower lead problems
The power leads temps are starting to cycle again. Earlier today M9 
experimentor cycled HIC142 to stablize the oscillations. They started 
again early this morning, so cycled HIC142 again. Oscillations died back, 
but are still present. Will try and warm the power leads later today when 
the experiment's sample is changed.
  209   Sat Jul 28 15:45:17 2007 Doug PreddyQuench Recoveryquench recovery
The solenoid tripped off this morning due to pwer lead over temp. The 
compressor was also off. I restarted this morning at about 8:15 in 
parallel cold return. Switching to series mode at 3:40.
  210   Sat Jul 28 22:30:13 2007 Doug PreddyQuench Recoveryquench again
recovered system and energized solenoid at about 6:00 this evening.
At 9:30 power lead temps quenched solenoid again. MV52 stuck open during 
start-up.
  211   Sun Jul 29 04:58:27 2007 Doug PreddyQuench RecoveryEnergizing solenoid
LHe level~50%. Still have a slight ripple in the power leads, but they are 
cold enough to power the solenoid. LHe_in varies between 10.7K - 11.3K.
  213   Mon Aug 6 08:41:31 2007 Doug PreddyQuench RecoveryCold box trip at 6:00
compressor off due to cold box trip at 6:00 this morning. Restarted system 
and started flow to solenoid in parallel cold return.
  214   Tue Aug 14 10:15:22 2007 Doug PreddyMaintenanceSolenoid ramped down
Solenoid ramped down and locked out for M9A slits work.
  215   Tue Aug 14 12:55:12 2007 Doug PreddyNormal RunningStrip tool saves
There are two strip tools saved:
coils
powerlead
  216   Wed Sep 12 12:01:02 2007 Doug PreddyMaintenanceregenerated adsorber
regenerated adsorber
replaced MV902 "ON" switch (used nitrogen precooling on switch)
  217   Fri Sep 14 12:44:52 2007 Doug PreddyStart Upstarted compressor
running purifier over weekend
  219   Wed Sep 19 20:53:18 2007 Doug PreddyMaintenanceMore diff pump news
Cold box pumped out to ~ 190 mTorr overnight.Leak checked the pump again. 
Still leaks at dip stick.Tried resetting the o-ring on the dip stick. It 
still leaks baddd!!!
Machined the old seal off and installed a smaller o-ring onto dip stick. 
Installed 60 ml of new pump oil into pump. Pumping down again. 
After 4 hours the cold box is down to 160 mTorr.
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