 Tue May 4 11:20:57 2004, Doug Preddy, Normal Running, power leads going unstable
|
power lead ripples increased over last couple of days. They are quickly
dieing out now and the temps are startint to increase. PL flow is down to
<180mm. I will power cycle HIC 142. |
Tue May 4 11:26:38 2004, Doug Preddy, Normal Running, power leads 
|
Power cycled HIC 142 with solenoid power at 400 amps. Flows > 240mm and
temps have dropped. |
|
Wed May 5 07:55:37 2004, Doug Preddy, Quench Recovery, Solenoid quenched on power lead temp
|
Solenoid quenched on power lead temp. I ran down and managed to recover it
with minimal temp rise in the solenoid. Coil temps are falling, liquid is
building. No flow to the power leads yet. |
|
Wed May 5 09:59:10 2004, Doug Preddy, Quench Recovery, started flow to power leads
|
Started flow to power leads.
TIC121 into auto mode |
|
Wed May 5 12:13:51 2004, Doug Preddy, Normal Running, power leads cold
|
should be ready to run. |
|
Fri May 21 09:27:39 2004, Doug Preddy, Maintenance, Idle mode
|
Power supply was ramped down yesterday as there are no users.
The Sundance server was rebooted yesterday. This morning the displays were
all white screened, so I restarted the session. The computer was running
very slow and I could not get the strip tool to run at all. I rebooted the
local PC and everything seems to be okay now.
While rebooting the computer had an error message that the hard drive may
have some bad sectors. Did a scan disk and it seems okay, but the hard
drive might be dying in the local machine. |
|
Tue Jul 27 23:33:27 2004, Doug Preddy, Quench Recovery, Solenoid quench 9:30
|
I was phoned at about 9:30 tonight with a solenoid alarm. After looking at
the display I found the system to be tripped off. When I came in I found
the compressor off and the solenoid quenched. There was no real indication
of the problem other than a cold box fault. I restarted the compressor and
started flow to the cold box.
Just a reminder: This elog is now at: https://elog.triumf.ca/M9sol |
|
Wed Jul 28 00:04:30 2004, Doug Preddy, Quench Recovery, started flow to solenoid
|
Solenoid temps were: C1 & C12 about 30K. C6 &C7 about 11K. Started flow to
solenoid in parallel cold return. Jumpered out the vacuum gauge for the
solenoid vacuum. |
|
Wed Jul 28 07:00:18 2004, Doug Preddy, Quench Recovery, switch to series mode
|
Switching to series mode. Jumper on vacuum gauge removed. |
|
Wed Jul 28 21:26:19 2004, Doug Preddy, Quench Recovery, Double Power bump
|
Two power bumps tonight. Everything tripped of. Restarted cooling water
pump, diff. pump under solenoid etc. Computer stayed on! Starting
compressor. |
|
Wed Jul 28 22:01:31 2004, Doug Preddy, Quench Recovery, Starting flow to solenoid
|
c1 28, c12 29, c6 11.6, c7 12.5 TI121 22.5 |
|
Wed Jul 28 23:07:01 2004, Doug Preddy, Quench Recovery, solenoid cooling
|
cooling rates for the solenoid are good. In parallel cold return. |
|
Thu Jul 29 09:01:11 2004, Doug Preddy, Quench Recovery, switched to parallel cold
|
Changed to series mode. |
|
Thu Jul 29 13:25:29 2004, Doug Preddy, Quench Recovery, start flow to power leads
|
|
|
Thu Aug 19 10:28:32 2004, Doug Preddy, Start Up, after M9bv5 FIX
|
Over the last couple of days we replaced the gate on the M9BV5 valve. The
old one had worn the teflon sliders on the sides. Metal shavings on bottom
of body. Found a replacement with metal rollers, rather than slides.
Pumped out downstream of gate valve. It's down to 5E-7 (moved the cable on
the ion gauge so it now reads.)
Started cooling down the solenoid. Charging through the adsorber. LN2 fill
piping broke. Repaired by resoldering.
Ion gauge on solenoid seems to have burnt out last night. |
|
Tue Aug 24 12:09:50 2004, Doug Preddy, Normal Running, The past few days
|
The solenoid has been re-started as of August 19. It was cooled down and
energized over the weekend. Sunday night at 9:30 it tripped due to
negative power lead going above it's set point. The system stopped flow to
the solenoid, but kept the compressor and cold box running. While starting
flow to the solenoid, we got a high pressure trip. I came in and restarted
the compressor, after Curtis located and reset the over pressure
interlock. The solenoid is cold and energized as of 3:30 pm yesterday. It
is still stable as of now. |
|
Wed Aug 25 07:47:05 2004, Doug Preddy, Normal Running, Power lead flow
|
The power lead flows had dropped to 210 mm this morning. I increased HIC142
from 0.8 to 0.83. The flows are back to <250 mm and the temps are back to
LHe in-10.8, PL-Pos-11.1, PL-Neg-8.9 |
|
Wed Aug 25 12:52:53 2004, Doug Preddy, Normal Running, power lead ripple
|
Lhe ripple has started. 10.9-11.4K PL-Pos also has a smaller ripple. Both
flows down to 230mm. Cycled HIC 142 and the ripple disappeared.
Put TIC121 into auto mode. |
|
Sun Aug 29 14:39:19 2004, Doug Preddy, Normal Running, Power lead ripple
|
The LHe in and PL-neg temps have been building up a ripple over the last
few days. Curtis cycled HIC142 Friday evening at about 5:00. I just had
the Main control room operator (Peter) cycle them again. The ripples died
right out.
Originally the ripple was 10.8-11.4K on the LHe-in and 8.9-9.2K on the PL-
Neg. They are now steady at 10.7K and 8.9K. |
|
Fri Sep 3 01:28:43 2004, Doug Preddy, Quench Recovery, power up
|
started flow to the power leads at 11:30. Cold and stable at 1:00am.
Energized solenoid at 1:30. |