<!-- Title: 00:13:27  Wed Mar 14 2001 -->
<!-- Crewchief: Gordon -->
<!-- Op1: Cahill -->
<!-- Op2: &nbsp; -->
<!-- Op3: &nbsp; -->
<!-- Op4: &nbsp; -->
<!-- Op5: &nbsp; -->
<!-- Op6: &nbsp; -->
<!-- Notes: -->
Solenoid cooldown in progress.


<!-- Date: Wed Mar 14 00:35:51 2001 -->
CHW ch1 discharge press is about 20 to 40 psi lower than the others and the low press sw light is on for comp #2. Steve hit the reset switch and corrected that. 
Also chillers #1,2,and 3 show up as in alarm on the alarm page but normal in the pump room.
<!-- Author: C. Cahill -->


<!-- Date: Wed Mar 14 01:24:58 2001 -->
Approx 00:42 we lost data in the cryo control room computers for a second then regained it.  About 1:20 the computers had another glitch for a moment and then all ok.
<!-- Author: C. Cahill -->


<!-- Date: Wed Mar 14 01:28:53 2001 -->
Cooldown rate dropped a little, so I raised setpoint for EVCP to 8 psig. Taking all the warm gas thru PVQR now.
<!-- Author: Steve -->


<!-- Date: Wed Mar 14 02:21:04 2001 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-131&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-131  width='300' align='top'></td><td>Cooldown average rate is 1.75K/hr.</a></td></tr></table>
<!-- Author: Steve -->


<!-- Date: Wed Mar 14 04:31:23 2001 -->
There was a warming of the output of the heat exchanger; TX1HP vpt was reading 97 psig. I closed down on  PVX1 to cool this back down. PVXLN was wide open but the pot level has been ~40 to 50% full.
<!-- Author: Steve -->


<!-- Date: Wed Mar 14 05:22:11 2001 -->
Bob Sanders is here, so we cooled down the east dry engine and started it.
<!-- Author: Steve -->


<!-- Date: Wed Mar 14 05:29:55 2001 -->
Per Rob's request, changed collision hall fans to slow purge. HVAC alarms came in and I silenced them on the alarm page. 
<!-- Author: Steve -->


<!-- Date: Wed Mar 14 09:34:04 2001 -->
Dean connected air line to PVLF actuator/solenoid
<!-- Author: Sanders -->


<!-- Date: Wed Mar 14 10:02:12 2001 -->
Changed LCW high pressure alarm to 230 psig. 
  
<!-- Author: Schmitt -->


<!-- Date: Wed Mar 14 13:53:12 2001 -->
Replaced O-ring valve on vacuum valve HUT-4 (on catwalk in CH).  Leak checked OK.  Back in service.  Also checked HUT-3 for vacuum, no problems.
<!-- Author: Warren -->


<!-- Date: Wed Mar 14 14:23:17 2001 -->
loaded low stage of compressor to 75%, increased dry engine from 800 to 1400. 
 
If discharge pressure falls off as dry engine cools compensate by loading compressor more.
<!-- Author: rdk, rr, hc -->


<!-- Date: Wed Mar 14 15:38:39 2001 -->
Around 10:00 t0 11:00.  Slowed down coldown because of problem keeping the heat exchanger LN2 pot full.  The prblem was caused by a 200 micron vacuum in VSCLRLN on the LN2 subcooler which appears to be also the LN2 transfer line vacuum.
<!-- Author: Sanders -->


<!-- Date: Wed Mar 14 15:39:27 2001 -->
Put PVQR in manual at 100%
<!-- Author: Sanders -->


<!-- Date: Wed Mar 14 16:58:07 2001 -->
<pre>Heat exchanger II warmed up.  We then put PVX1 and PVX2 in manual and set PVX2 to 50% from 100%. Heat exchanger II then started cooling down and inlet temperature to the dewar (RDEWIN_P) started dropping (it had been going up).  Note that operating procedure # 5, step #10 states when starting the dry engine, PVX2 should have a maximum of 50% and a minimum of 30%.</pre>
<!-- Author: Sanders -->


<!-- Date: Wed Mar 14 17:31:48 2001 -->
Losing vacuum on VSCLRLN.  Connected pump, regained vacuum, turned off pump and reclosed valve.  Continuing to monitor.
<!-- Author: Warren -->


<!-- Date: Wed Mar 14 18:42:27 2001 -->
Del and I completed the clc start-up checklist that Dean and Del started.  
 
There was a difference in what the computer read and the 02 analyzer read for a while but it corrected itself some how.
<!-- Author: KC -->


<!-- Date: Wed Mar 14 19:20:05 2001 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-132&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-132  width='300' align='top'></td><td>2.25 K per hour.</a></td></tr></table>
<!-- Author: Steve -->


<!-- Date: Wed Mar 14 20:50:47 2001 -->
Cooldown rate is reaching 3K per hour. Opening up EVCP and slowed the dry engine to 1100 rpm.
<!-- Author: Steve -->


<!-- Date: Wed Mar 14 22:59:21 2001 -->
Slowed rate to ~ 2.5K per hour. There was no effective flow through EVCP. Closing the JT 1%, this allowed EVBP to close, so flow could be established through EVCP up the shell side. 
<!-- Author: Steve -->


<!-- Date: Thu Mar 15 01:25:51 2001 -->
Closed down EVCP. Increased JT. 2.2K/hr cooldown rate.
<!-- Author: Steve -->


<!-- Date: Thu Mar 15 11:33:35 2001 -->
Finished purging and filling CLC chambers.  Pressure is 3.5 PSIG, O2 sensor and Isobutane tank valves closed, system operating on auto, but with manual valves closed to maintain 3.5 PSIG instead of 2.5 PSIG (program default).
<!-- Author: Warren -->
<!-- Comment: Thu Mar 15 13;58;30 comment by...Warren -->
0800   Changed isobutane bottle
1220   Closed the frozen Dewar fill valve on LN2 Dewar 18
1230   Turned off isobutane bottle heater



<!-- Date: Thu Mar 15 14:00:35 2001 -->
Started up North dry engine. Running at 600 rpm, wet engine suction and exhaust dropping it temperature.
<!-- Author: Warren -->


<!-- Date: Thu Mar 15 14:01:44 2001 -->
Adjusted flow rate on TOP up to 3 SCFM.
<!-- Author: Warren -->