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Solenoid
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Solenoid logbook, Page 13 of 15
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Wed Dec 31 16:00:00 1969
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ID
Date
Author
Operational Mode
Subject
Text
46
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
45
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
44
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
43
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
42
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
41
Sat Aug 7 23:40:47 2004
Willy Andersson
Quench Recovery
Energizing solenoid
23:39 Powerleads cold, LHe level over 40%
and rising. Energizing solenoid
to 500 Amps, ramp rate 60. Checking compressor
40
Sat Aug 7 22:37:04 2004
Willy Andersson
Quench Recovery
Compressor tripped off.
Got a call at about 10:00 this morning, the
whole system had tripped off.
No power bumps or other disturbances. When
39
Thu Jul 29 13:25:29 2004
Doug Preddy
Quench Recovery
start flow to power leads
38
Thu Jul 29 09:01:11 2004
Doug Preddy
Quench Recovery
switched to parallel cold
Changed to series mode.
37
Wed Jul 28 23:07:01 2004
Doug Preddy
Quench Recovery
solenoid cooling
cooling rates for the solenoid are good. In
parallel cold return.
36
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
35
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
34
Wed Jul 28 07:00:18 2004
Doug Preddy
Quench Recovery
switch to series mode
Switching to series mode. Jumper on vacuum
gauge removed.
33
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
32
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
31
Tue Jun 29 14:59:46 2004
Willy Andersson
Normal Running
Removed jumper on vacuum controller.
Tuesday 14:55
Removed jumper on back of PIC 901. This jumper
30
Fri Jun 25 14:20:58 2004
Willy Andersson
Quench Recovery
Switch to series mode
At about 14:00 solenoid temps dipping below
8 K. Trace of LHe level (dense
gas) starting to show. Switching to series
29
Fri Jun 25 12:36:04 2004
Willy Andersson
Quench Recovery
Compressor unloaded etc.
At about 09:30 this morning I noticed the
sound coming from the compressor
building seemed louder than usual. After
28
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.
27
Thu May 6 09:32:13 2004
Willy Andersson
Quench Recovery
Additional notes from last night power lead problems.
When performing last nights refrigerator adjustments
I also increased the
compressor discharge pressure to 11.25 barA.
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