| ID |
Date |
Author |
Operational Mode |
Subject |
|
66
|
Sat Oct 16 17:18:50 2004 |
Other | | lame |
|
|
65
|
Sat Oct 16 17:13:19 2004 |
Other | | s |
s |
|
64
|
Wed Oct 13 08:17:00 2004 |
Experimentor | Start Up | cycling 142 when temp hit 10.68 |
I tried cycling the valve twice -- at about 11:30 and again around 1:00,
trying both the buttons and the dial -- but it has had no effect on
the temperatures (aside from the transient spikes). That might be
bad. We will have to see if it altered the trend.
--
Donald Arseneau |
|
63
|
Tue Oct 12 13:00:08 2004 |
Curtis Ballard | Start Up | cv142 valve |
Curtis closes and opens slowly at about 11:00 am this morning. Wants to see
if that works better than the sudden on/off switch.
reported by srk |
|
62
|
Tue Oct 12 02:05:31 2004 |
Experimentor | Start Up | cv142 valve |
after only two hours since last lead cycling, they warm up quickly.
ops cycles the valve, but more quickly this time, off ... 1 sec ... on.
syd |
|
61
|
Mon Oct 11 22:32:11 2004 |
Experimentor | Start Up | cv142 valve |
temp of leads begins its exponential rise again (caught it at 12K), approx
11 hours after last reset. this time asked operator to shut off valve for
3 seconds, then turn back on.
previous recycle, asked operator to shut off valve for two seconds ... and
the warm up time was 11 hours.
previous^2 recyle, asked operator to shut off valve for 1 second ... and
the warm up time was only 4 hours.
Syd |
|
60
|
Mon Oct 11 11:49:34 2004 |
Experimentor | Start Up | cv142 valve |
noticed temp rise, which occured only about 5 hours after the
last "reset" .... the time between resets seems to be decreasing, which is
not a good sign.
had the controll room guys reset the cv142 valve (i.e. cycle it off/on)
syd |
|
59
|
Mon Oct 11 03:56:14 2004 |
Experimentor | Start Up | cv142 valve |
noticed that the lead temp rose to 24K over the past 4 hours. had control
room personnle cycle the cv142 valve. temperature dropped.
srk |
|
58
|
Sun Oct 10 17:36:35 2004 |
Experimentor | Start Up | power leads |
At 5:30 pm sundat, power lead temp is about 10.6K. script tool still
notworking
syd kreitzman |
|
57
|
Sat Oct 9 22:50:26 2004 |
Other | | power leads warmed |
At 10:30 PM Saturday, Donald Arseneau sees power leads at
25K, having gone up for the previous 10 hours. (I didn't
see it earlier because striptool wasn't scrolling). Cycled
valve 142.
-- Donald Arseneau |
|
56
|
Thu Oct 7 13:33:20 2004 |
Doug Preddy | Start Up | turned off purifier |
turned off purifier |
|
55
|
Wed Oct 6 09:25:54 2004 |
Doug Preddy | Start Up | switch to series mode |
switched to series mode |
|
54
|
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. |
|
53
|
Tue Oct 5 07:18:16 2004 |
Doug Preddy | Start Up | adjust compressor discharge pressure |
adjusted compressor discharge pressure to 11 Bar |
|
52
|
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. |
|
51
|
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. |
|
50
|
Mon Sep 13 13:56:06 2004 |
Doug Preddy | Shut Down | compressor off |
compressor off |
|
49
|
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. |
|
48
|
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. |
|
47
|
Thu Sep 2 21:58:34 2004 |
Willy Andersson | Quench Recovery | Switch to series cooling |
Solenoid had tripped on powerlead overtemp at about 09:00 this morning.
Doug recovered the system to // cooling. I switched system to series
cooling at about 21:30. LHe level at about 10%. Buffer tank pressure is low
at about 13 psig. Letting LHe level build. Once LHe level rises to about
35% then I suggest starting flow to the powerleads by opening HIC142 fully
open. LHe level should continue to build but at a much slower rate. Once
power lead temps have bottomed out to cr_pl_neg < 9K and cr_pl_pos < 11 K
(check these values with archived data first) and are stable then can
energize solenoid. |