 Wed Jul 4 11:13:12 2007, Doug Preddy, Quench Recovery, test
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This is a test to make sure the e-mail works. |
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Sun Jul 1 16:09:37 2007, Doug Preddy, Normal Running, M9B:DP2 tripped off
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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. |
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Tue Jun 19 21:15:41 2007, Doug Preddy, Quench Recovery, Today's quench
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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. |
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Sat Jun 16 15:05:03 2007, Doug Preddy, Normal Running, Solenoid power lead temp problem
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Power lead temps rippling and increasing. I asked an operator to cycle
HIC142. This seems to have fixed the problem (for now). |
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Thu Jun 14 00:10:10 2007, Doug Preddy, Quench Recovery, recovering from earlier quench
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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. |
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Tue Jun 12 12:48:25 2007, Doug Preddy, Maintenance, added one bottle UHP helium to system
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Thu May 31 11:51:49 2007, Doug Preddy, Quench Recovery, Switched to series mode
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Thu May 31 07:11:05 2007, Doug Preddy, Quench Recovery, switched to parallel cold return
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switched to parallel cold return earlier this morning. Vacuum is 5 x 10-5. |
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Wed May 30 11:27:32 2007, Doug Preddy, Quench Recovery, Problems recovering
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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. |
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Wed May 30 08:38:38 2007, Doug Preddy, Quench Recovery, Solenoid quenched this morning
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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. |
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Wed May 16 10:02:35 2007, Doug Preddy, Maintenance, warming up power leads
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Power lead temps have been slowly increasing over the last wekk. I ramped
the solenoid down and am warming the power leads to >80k. |
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Wed May 2 16:28:16 2007, Doug Preddy, Normal Running, Energizing solenoid to 500 amps
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Power supply initially would not ramp up. I exercised the rate control
selector switch and found that the power supply would ramp up at only the
30 minute setting. It is ramping up at a rate of about 60 minutes. |
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Mon Apr 30 09:30:26 2007, Doug Preddy, Normal Running, problems over weekend
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The PLC Limit switch power supply was tripped off on Saturday. I came in
and reset it and restarted all the vacuum systems that had tripped off.
The power leads were found to be warming up. This morning they were at ~
45K. I stopped flow to the power leads and will allow them to warm up
above 80K and then will recool them. |
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Fri Apr 27 10:32:07 2007, Doug Preddy, Quench Recovery, Reset quench relay logic box
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The quench relay logic controller was not functioning correctly. It showed
a "Trip" light and no other lights. I cycled the power to the controller
and it now seems to be working properly. This did cause a quench and I am
now recovering the system. |
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Fri Apr 27 10:16:44 2007, Kevin Trithardt, Quench Recovery, Test
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Don't Panic -- There was no quench. I am testing the e-log.
I have added Kevin's name and e-mail to the M9 e-log. He will be e-mailed
when a quench recovery log is submitted. His name is also included in the
Author's list.
Thanks, Doug |
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Fri Apr 27 10:10:07 2007, Doug Preddy, Normal Running, Solenoid Cold
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Solenoid cold, power leads cold. Alarm handler started. |
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Tue Apr 24 10:21:49 2007, Doug Preddy, Start Up, Started flow to turbines
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Started flow to turbines at about 10:00 in parallel warm mode. |
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Mon Apr 23 16:31:02 2007, Doug Preddy, Start Up, Started compressor
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Startewd compressor and purifer today. |
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Fri Apr 20 12:15:12 2007, Doug Preddy, Start Up, remote PLC switch
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I could not control the vacuum devices using EPICS. The buttons could be
pushed, but nothing would respond. The PLC was in local mode. Thumbwheel
to 100, push On/Open button to put it into remote mode. |
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Thu Apr 19 15:18:25 2007, Doug Preddy, Start Up, preparing to start the refrigerator
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Starting the vacuum systems in the coldbox and solenoid. |