M9sol Logbooks Solenoid Daily log
  Solenoid logbook, Page 6 of 15  ELOG logo
ID Date Authordown Operational Mode Subject
  49   Mon Sep 13 10:55:25 2004 Doug PreddyShut DownQuench and shutdown
The solenoid quenched on powerlead temps this morning at 10:00. It is 
warming up and the power leads are >200K.Isolating and purging the coldbox 
is not very useful now, so I am shutting the system down.
  50   Mon Sep 13 13:56:06 2004 Doug PreddyShut Downcompressor off
compressor off
  51   Fri Oct 1 11:39:55 2004 Doug PreddyMaintenanceLoading of compressor not working
When the compressor was restarted on Monday, the remote load button would 
not respond. The compressor was shut off. After two days of searching the 
wiring etc. a bad connection was found on DR1 relay (upstairs in the 
compressor control panel). The wire was the "compressor on" sensor. 
Connection was cleaned and retightened.
The compressor was started this morning and is working. 
I pressurized the cold box and started flow to the solenoid and through the 
power leads. I started a continuous flow throughthe LN2 adsorber. This will 
be run over the weekend. Cooling to start Monday morning.
  52   Mon Oct 4 09:16:29 2004 Doug PreddyStart UpStarted turbines
Started flow to the turbimes with the solenoid in parallel warm return.
  53   Tue Oct 5 07:18:16 2004 Doug PreddyStart Upadjust compressor discharge pressure
adjusted compressor discharge pressure to 11 Bar
  54   Wed Oct 6 07:57:01 2004 Doug PreddyStart Upparallel cold return
Switched to parallel cold return at 4:00 yesterday afternoon.
6:30 this morning started closing cv155 as temps had bottomed out at 24K.
  55   Wed Oct 6 09:25:54 2004 Doug PreddyStart Upswitch to series mode
switched to series mode
  56   Thu Oct 7 13:33:20 2004 Doug PreddyStart Upturned off purifier
turned off purifier
  69   Wed Oct 20 09:38:17 2004 Doug PreddyStart Uprestarting system
Solenoid tripped  off Monday morning due to high compressor pressure. 
Regenerated purifier on Tuesday. Started compressor at 9:00 this morning.
  70   Thu Oct 21 07:16:35 2004 Doug PreddyStart Upswitched to parallel cold return
  71   Thu Oct 21 15:41:29 2004 Doug PreddyStart Upswitched to series mode
  72   Fri Oct 22 09:15:06 2004 Doug PreddyStart Upstarted flow to power leads
Started flow to power leads HIC142 at 0.8. 
  73   Mon Oct 25 15:44:15 2004 Doug PreddyNormal RunningPower lead temps starting to ripple
Power lead temps starting to ripple at a 1.5min period. PL flows are 
both>250 mm.
  74   Tue Oct 26 09:45:24 2004 Doug PreddyNormal Runningpower leads warming
Flow to power leads dropped to <80 mm. Cycled HIC142. Temps dropping, flows 
>250.
  75   Fri Oct 29 14:25:23 2004 Doug PreddyNormal Runningpower lead flows dropping
Flow is down to <190 mm. temps are starting to climb. Cycled HIC142
  76   Mon Nov 1 07:17:44 2004 Doug PreddyNormal Runningpower lead flow gone bad
power temps as follows:
LHE_IN 23
PL_POS 36
PL_NEG 31
Flow <90mm 
cycled HIC 142 off and on in 1/2 hour.
  77   Thu Nov 4 13:33:49 2004 Doug PreddyNormal RunningPower supply problems
Last night the power supply was ramping up at a very slow rate. This 
morning it was energized,but with no current even though the limit was set 
to 500 amps. Klaus R. found the pot. that set the current limit was bad. 
Repaired it. First try at ramping caused a voltage imbalance and a quench 
I. After a quick recovery, the second try was successfull. Solenoid ramping 
to 500 amps at a good rate.
  78   Tue Nov 23 07:47:00 2004 Doug PreddyQuench RecoverySolenoid quench Nov 21
Solenoid quenched Nov 21 due to alarge power bump. Everything tripped off 
including vacuum and water pumps. Cold box vacuum was at 3.6e-1, so pumped 
it out overnight.
Started compressor at 7:20. Started turbines at 7:40.
  79   Tue Nov 23 09:30:15 2004 Doug PreddyQuench Recoverystarted flow to solenoid
Started flow to solenoid in parallel warm return.
  80   Tue Nov 23 11:35:44 2004 Doug PreddyQuench RecoveryAnother power bump
Compressor tripped off again due to a power bump. Meson hall water off, so 
vacuum pumps off again.
Pumps back on , vacuum pumps on, starting compressor.
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