 Mon Sep 13 10:55:25 2004, Doug Preddy, Shut Down, Quench 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. |
|
Mon Sep 13 13:56:06 2004, Doug Preddy, Shut Down, compressor off
|
compressor off |
|
Fri Oct 1 11:39:55 2004, Doug Preddy, Maintenance, Loading 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. |
|
Mon Oct 4 09:16:29 2004, Doug Preddy, Start Up, Started turbines
|
Started flow to the turbimes with the solenoid in parallel warm return. |
|
Tue Oct 5 07:18:16 2004, Doug Preddy, Start Up, adjust compressor discharge pressure
|
adjusted compressor discharge pressure to 11 Bar |
|
Wed Oct 6 07:57:01 2004, Doug Preddy, Start Up, parallel 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. |
|
Wed Oct 6 09:25:54 2004, Doug Preddy, Start Up, switch to series mode
|
switched to series mode |
|
Thu Oct 7 13:33:20 2004, Doug Preddy, Start Up, turned off purifier
|
turned off purifier |
|
Wed Oct 20 09:38:17 2004, Doug Preddy, Start Up, restarting system
|
Solenoid tripped off Monday morning due to high compressor pressure.
Regenerated purifier on Tuesday. Started compressor at 9:00 this morning. |
|
Thu Oct 21 07:16:35 2004, Doug Preddy, Start Up, switched to parallel cold return
|
|
|
Thu Oct 21 15:41:29 2004, Doug Preddy, Start Up, switched to series mode
|
|
|
Fri Oct 22 09:15:06 2004, Doug Preddy, Start Up, started flow to power leads
|
Started flow to power leads HIC142 at 0.8. |
|
Mon Oct 25 15:44:15 2004, Doug Preddy, Normal Running, Power lead temps starting to ripple
|
Power lead temps starting to ripple at a 1.5min period. PL flows are
both>250 mm. |
|
Tue Oct 26 09:45:24 2004, Doug Preddy, Normal Running, power leads warming
|
Flow to power leads dropped to <80 mm. Cycled HIC142. Temps dropping, flows
>250. |
|
Fri Oct 29 14:25:23 2004, Doug Preddy, Normal Running, power lead flows dropping
|
Flow is down to <190 mm. temps are starting to climb. Cycled HIC142 |
|
Mon Nov 1 07:17:44 2004, Doug Preddy, Normal Running, power 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. |
|
Thu Nov 4 13:33:49 2004, Doug Preddy, Normal Running, Power 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. |
Tue Nov 23 07:47:00 2004, Doug Preddy, Quench Recovery, Solenoid 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. |
|
Tue Nov 23 09:30:15 2004, Doug Preddy, Quench Recovery, started flow to solenoid
|
Started flow to solenoid in parallel warm return. |
|
Tue Nov 23 11:35:44 2004, Doug Preddy, Quench Recovery, Another 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. |