<!-- Title: 07:07:04  Sat Sep 30 2000 -->
<!-- Crewchief: Bob Kephart -->
<!-- Op1: Steve Gordon -->
<!-- Op2: KC Cahill -->
<!-- Op3: &nbsp; -->
<!-- Op4: &nbsp; -->
<!-- Op5: &nbsp; -->
<!-- Op6: &nbsp; -->
<!-- Notes: -->
Flowing helium throught the system; prepare for cooldown.


<!-- Date: Sat Sep 30 07:21:55 2000 -->
valve open tube trailer to LABS. set regulator at 125 psi, Tube trailer pressure = 2000 psi.
<!-- Author: RDK -->


<!-- Date: Sat Sep 30 08:17:09 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-42&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-42  width='250' align='top'></td><td>Beginning strain gauge readings</a></td></tr></table>
<!-- Author: Steve -->


<!-- Date: Sat Sep 30 08:23:04 2000 -->
Verified all LN2 valve operation.
<!-- Author: sg -->
<!-- Comment: Sat Sep 30 08;38;53 comment by...Steve -->
Opened PVXLN and verified N2 flow out of the vent.


<!-- Date: Sat Sep 30 08:52:41 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-43&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-43  width='250' align='top'></td><td>trying again</a></td></tr></table>
<!-- Author: sg -->


<!-- Date: Sat Sep 30 09:19:06 2000 -->
<pre>When we opened tube trailer up to LABS we spiked up to 50 PPM on Arc cell. Some confusion over how arc cell is plumbed.  Conclude BABS arc cell line runs to header at LABS and then over to arc cell, tube trailer empties into the same manifold. We sent it a small spike of contamination. Measured HP header with arc cell, still reads close to 0 ppm. Close lines that were recirculating through BABS and LABS. Valved off adsorder.</pre>
<!-- Author: RDK -->


<!-- Date: Sat Sep 30 09:20:23 2000 -->
When we opened tube trailer up to LABS we spiked up to 50 PPM on Arc cell. Some confusion over how arc cell is plumbed.  Conclude BABS arc cell line runs to header at LABS and then over to arc cell, tube trailer empties into the same manifold. We sent it a small spike of contamination. Measured HP header with arc cell, still reads close to 0 ppm. Close lines that were recirculating through BABS and LABS. Valved off adsorder.
<!-- Author: RDK -->


<!-- Date: Sat Sep 30 09:41:05 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-44&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-44  width='250' align='top'></td><td>System changes Sept. 11, 2000</a></td></tr></table>
<!-- Author: Bob Sanders -->


<!-- Date: Sat Sep 30 09:44:45 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-48&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-48  width='250' align='top'></td><td>Documentation</a></td></tr></table>
<!-- Author: Bob Sanders -->


<!-- Date: Sat Sep 30 09:46:48 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-50&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-50  width='250' align='top'></td><td>More documentation.</a></td></tr></table>
<!-- Author: Bob Sanders -->


<!-- Date: Sat Sep 30 09:48:23 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-51&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-51  width='250' align='top'></td><td>Pressure test.</a></td></tr></table>
<!-- Author: Bob Sanders -->


<!-- Date: Sat Sep 30 09:55:03 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-52&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-52  width='250' align='top'></td><td>Starting parameters.</a></td></tr></table>
<!-- Author: Steve -->


<!-- Date: Sat Sep 30 10:46:33 2000 -->
close all block and bleed valves on HTX, enable PVXLN loop to bring LN2 into heat exchanger. Open subcooler 100% in manual, PVNI and PVNS in manual and set to 0 % for now. PVQR in manual and set to 7 %. Leads flows both at 0.6 gm/sec. Expansion box on LN2 line reads 944 microns ==> we put a pump on it.
<!-- Author: RDK -->
<!-- Comment: Sat Sep 30 11;31;47 comment by...sg -->
i.e., started  cooldown.
<!-- Date: Sat Sep 30 11:19:26 2000 -->
<pre>conclude that LN2 expansion box vacuum is fine. Read it with hastings portable readout and it reads 18 microns. iFix displayed reading 944 microns is wrong... needs to be fixed. 
 
Closed subcooler when line out frosted. Heat exchanger pot is filling. PVQR is at 20 %. RDEWIN is 293 K and falling, RSCLR is 294 K.</pre>
<!-- Author: RDK -->


<!-- Date: Sat Sep 30 11:20:56 2000 -->
Conclude that LN2 expansion box vacuum is fine. Read it with hastings portable readout and it reads 18 microns. iFix displayed reading 944 microns is wrong... needs to be fixed. 
 
Closed subcooler when line out frosted. Heat exchanger pot is filling. PVQR is at 20 %. RDEWIN is 293 K and falling, RSCLR is 294 K.  Also conclude that these entries should have HTML selected as default.
<!-- Author: RDK -->



<!-- Date: Sat Sep 30 19:15:27 2000 -->
<pre>Loop Status: 
PVX1 manual 25% 
PVX2 MAN  35% 
PVXLN AUTO SP=40% 
PVXLP MAN 100%</pre>
<!-- Author: R Sanders -->


<!-- Date: Sat Sep 30 19:28:06 2000 -->
<pre>More LOOP Status 
engines OFF manual at 0 RPM 
PVXBY MAN 0% 
PVXJT MAN 100% 
EVBP AUTO 20 psi (dewar pressure) 
PVLF MAN 0% 
PVSC man 0% 
PVMF man 100% 
CP_QR loops automatic 
Solenoid Cooldown logic (reset and started) 2K/hr ramp rate 
Quench recovery OFF 
PVLFA, PVLFB in standby mode 
PVNI, PVNS man 30% 
PVLOSUC AUTO SP=1.5 psig 
PVHISUC AUTO SP=281 psig 
PVHIDIS AUTO SP=275 psig 
adsorber isolated, ADSBR loop in AUTO SP=90% controlls LN2 level 
 
</pre>
<!-- Author: R Sanders -->


<!-- Date: Sat Sep 30 19:30:53 2000 -->
PVLFB needs to be wired in
<!-- Author: R Sanders -->


<!-- Date: Sat Sep 30 20:05:28 2000 -->
Engine valves are proped open and the inlet utube valves cracked open.
<!-- Author: R Sanders -->


<!-- Date: Sat Sep 30 21:49:42 2000 -->
Cooldown loop was having trouble keeping PVQR open to the point where the valve was effective. (below 5% it seems to have no action) Dewar inlet temp was getting too cold. Problem is that temp at point where HTX1 and HTX2 flows meet was 80 K.  Set PVX1 to 15% and PVX2 to 35%, now temp at this junction is 138 K and PVQR seems to be able to control the cooldown. Team C leader is here and taking over... 
<!-- Author: RDK - forTeam B -->


<!-- Date: Sat Sep 30 21:55:07 2000 -->
<pre>Shift reading taken, everything OK except ECW Expansion tank #3 which read -1.5. Added about 100 gallons of distilled water, have not yet determined where leak is.</pre>
<!-- Author: Dave & Bruce -->


<!-- Date: Sat Sep 30 21:55:49 2000 -->
<pre>CHANGED THE TX4HP HeVPT TRANSDUCER ON THE HEAT EXCHANGER.</pre>
<!-- Author: BRUCE -->


<!-- Date: Sat Sep 30 22:44:00 2000 -->
Cooldown proceeding PVQR = 6.2%  Solenoid cooldown program looks to be working well.  Supply temp = 236.2K 
PPM inlet to HEX is essentially 0 ppm 
Looking at VPT problems  
<!-- Author: RPS -->


<!-- Date: Sat Sep 30 23:12:16 2000 -->
VPT situation: Looked at TX4HP (this is the one where we changed the transducer earlier today) Tdansducer reading 4.3 VDC which is about right considering the temp in the HEX at that point.  However, iFix reads TX4HP as a wild number I've seen it at 2350K to 4147K so it looks like there is a problem in how it's scaled.  But at least the transducer looks right. 
Looked at TX2LP transducer read 3.7 VDC which looks about right for the temperature at that part of the HEX so we will leave it alone for now. 
Looked at TX4LP => bad transducer we will try to change it out. 
For TXDELP we need H2 gas For TX3HP we need neon. 
Supply Temp = 234.2K 
<!-- Author: RPS -->


<!-- Date: Sun Oct 1 00:01:03 2000 -->
<pre>Argon/Ethane supply switched automatically from Tank #1 to Tank #2, no problems.</pre>
<!-- Author: Dave & Bruce -->


<!-- Date: Sun Oct 1 00:06:40 2000 -->
There's something funny about the way APACS calculates the value for TX4HP & TX4LP. The input seems OK (consistent with transducer working properly) and the block looks the same as other He_VPT conversion blocks but the output is wildly different, leading to displays that read several thousand degrees Kelvin.  Maybe Bob or Rich could look at this. 
Changed out 2 transducers on VPTs (TXDELP and TX4LP) Charged with H2 and He respectively. 
Supply Temp = 234.8K and PVQR = 6.4%  
<!-- Author: RPS -->


<!-- Date: Sun Oct 1 00:54:25 2000 -->
Time to go.  I briefed the SOS on what things to keep an eye on.  If they see something out of range on a few key parameters they will call.  Supply Temp = 232.5K PVQR = 6.5% Cooldown proceeding OK  Keep an eye on temps after the HEX 1 & @ combo PVX1 & PVX2 are in manual apparently to limit cooldown temps so that teh cooldown program stays in control.  A job for tomorrow would be to adjust the loop parameters so that we could have things stable in auto as temps drop. A 1% change in PVX1 (15 - 16%)will drive TX1HP down from 265K towards 80K. 
PPM reading = -0.66ppm (essentially 0)
<!-- Author: RPS -->


<!-- Date: Sun Oct 1 07:34:47 2000 -->
Isolated a leak in a small 1/8" line by closing MV-3260-H. 
This affected the Arc-Cell readings. We are trying to fix the leak so we can restart the arc-cell.
<!-- Author: Noe -->


<!-- Date: Sun Oct 1 07:58:53 2000 -->
Replaced a weld coupling with an 1/8" compression. Leak fixed 
Arc Cell back on.
<!-- Author: Noe -->


<!-- Date: Sun Oct 1 08:45:20 2000 -->
I enabled the inner shell heaters. Set point is 70 F.
<!-- Author: Noe -->


<!-- Date: Sun Oct 1 08:54:35 2000 -->
Techs are opening the auto air bleed on the ECW system. I suspect our loss was air in the system rather than a leak.
<!-- Author: Noe -->


<!-- Date: Sun Oct 1 10:08:46 2000 -->
PVQR at 8.5% under ramp control. Supply temp is at 213 K. RBOBCNT_P is at 283 K so delta temp on the gas is now 70 K. It appears ramp is going down faster than coil can follow so it may trip at some point. Otherwise it is fine. Opened PVNI AND PVNS to 35% in manual.
<!-- Author: RDK - forTeam B -->


<!-- Date: Sun Oct 1 10:27:16 2000 -->
Actually, looking at the APACs code for the ramp it appears that it will not trip if the gas to the solenoid gets too cold. We should be careful that the input gas temp does not get a lot too cold, and then the magnet (RBOBCNT_P) temp accelerates to a lot above 2 K per hour
<!-- Author: RDK -->


<!-- Date: Sun Oct 1 11:56:12 2000 -->
Checked across berm. Tube trailer is at 1750 psi, N2 Adsorber looks OK. Arc Cell reads 3.6 PPM at high side manifold. Not sure why it is so high since I think adsorber is valved in.
<!-- Author: RDK -->


<!-- Date: Sun Oct 1 12:21:40 2000 -->
Adsorber was indeed valved in. We valved it out and will check the arc cell readings. Currently the arc cell is 4.10 ppm.
<!-- Author: Steve -->
<!-- Comment: Sun Oct  1 12;47;47 comment by...Steve -->
Arc cell is at 12.6 ppm. We will have to valve the adsorber back in.
<!-- Comment: Sun Oct  1 13;00;54 comment by...Steve -->
Valved in the adsorber. 15.6 ppm.
<!-- Comment: Sun Oct  1 13;19;33 comment by...St -->
Reading 3.8 ppm.
<!-- Date: Sun Oct 1 12:22:42 2000 -->
Oh.... Steve Gordon and Dean Beckner on shift.
<!-- Author: Steve -->



<!-- Date: Sun Oct 1 12:48:38 2000 -->
Found the turbo pump tripped off. Restarting it.
<!-- Author: Steve -->




<!-- Date: Sun Oct 1 13:27:35 2000 -->
Turbo pump is back on, but I couldn't open PV70 due to a delta p interlock. This likely occured after scaling changes were made. I disabled the delta p in formation. Rich Schmitt needs to be notified Monday.
<!-- Author: Steve -->


<!-- Date: Sun Oct 1 16:30:53 2000 -->
<pre>shift reading taken everthing is ok,</pre>
<!-- Author: Dean Beckner -->


<!-- Date: Sun Oct 1 16:35:49 2000 -->
<pre>nex,sex , alcohol bubbler has a high alarm.</pre>
<!-- Author: Dean Beckner -->


<!-- Date: Sun Oct 1 17:08:34 2000 -->
Tried to sample adsorber in to the arc cell, but couldn't get enough pressure to the arc cell. We checked the vco and snooped the compression fittings, but there is still a screaming leak in that arc cell line. We left it valved off at the adsorber. Suspect the  line leaks at a braze joint. We will have to look for this when we can get on top of the berm.
<!-- Author: Steve and Dean -->


<!-- Date: Sun Oct 1 17:12:14 2000 -->
Sampling the adsorber output: 3.1ppm.
<!-- Author: Steve -->


<!-- Date: Sun Oct 1 17:21:06 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-53&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-53  width='250' align='top'></td><td>Pic of todays cooldown graph.</a></td></tr></table>
<!-- Author: Steve -->


<!-- Date: Sun Oct 1 19:44:22 2000 -->
Dean made a positioner for the LHe dewar shield valve (MV-1801-N). The valve was opened a little to cool the shield more. RDSHDLN was at 140K.
<!-- Author: Steve -->


<!-- Date: Sun Oct 1 21:39:11 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-54&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-54  width='250' align='top'></td><td>Interstage pressure. Not a source of contamination.</a></td></tr></table>
<!-- Author: Steve -->


<!-- Date: Sun Oct 1 22:01:34 2000 -->
Turbo tripped on "coolant failed". We need to increase the water flow. Will let it cool off.
<!-- Author: Steve -->
<!-- Comment: Sun Oct  1 22;27;43 comment by...Steve -->
We checked with the camera to see if we had any leaks and to check the water flowmeter. Couldn't see the flowmeter with the camera. 


<!-- Comment: Sun Oct  1 23;03;02 comment by...Steve -->
The turbo is back on at 1/2 speed.
<!-- Date: Sun Oct 1 23:01:47 2000 -->
<table><tr><td><a href=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-55&button=yes target='xxx' onclick='jswindow()'; align=top><img src=/cgi/elog/det-system-elog.pl?nb=cryo-gas&action=view&page=-55  width='250' align='top'></td><td>Cooldown numbers at 2300 hours.</a></td></tr></table>
<!-- Author: Steve -->



<!-- Date: Sun Oct 1 23:21:50 2000 -->
Turbo tripped again. Will leave it off for tonight.
<!-- Author: Steve -->


<!-- Date: Sun Oct 1 23:27:44 2000 -->
Currently, the solenoid cooldown rate is ~1K/hr.
<!-- Author: Steve -->


<!-- Date: Sun Oct 1 23:47:30 2000 -->
We checked across the berm: tube trailer at 1720psig, adsorber looks okay. Arc cell, however, is at 5.14ppm. 
<!-- Author: Steve & Dean -->


<!-- Date: Sun Oct 1 23:55:47 2000 -->
RBOBCNT_P is 270.34, RSCLR_P is 191.1; delt t is high but cooling is steady. 
<!-- Author: Steve -->


<!-- Date: Mon Oct 2 08:50:53 2000 -->
Connected arc cell to heat exchanger high pressure manifold.  Current reading is 6.77 PPM and it appears to be slowly dropping.
<!-- Author: R Sanders -->


<!-- Date: Mon Oct 2 09:54:12 2000 -->
THe arc cell was 6-7 PPM on high pressure. Changed arc cell connection to "0" gas it read <0.02.  It appears the adsorber is contaminated and needs to be derimed.
<!-- Author: R Sanders -->


<!-- Date: Mon Oct 2 10:03:17 2000 -->
<pre>supply temp setting is 169 K, actual supply is 177.8 so the difference is 8.5 K. PVQR is open to 33.2%. Conclude that we need to lower temp at front of exchanger. Currently PVX1 is at 17 % and PVX2 is at 35 %. Try increasing PVX1 to 20 %.</pre>
<!-- Author: RDK -->


<!-- Date: Mon Oct 2 10:26:41 2000 -->
Argon was delivered. Starting a mix to tank 1.
<!-- Author: Noe -->


<!-- Date: Mon Oct 2 10:46:51 2000 -->
<pre>Opened PVX1 to 25%.  Adsorber was valved off. Currently arc cell read 9.6 ppm from high side of xchanger manifold and it is rising.</pre>
<!-- Author: RDK -->


<!-- Date: Mon Oct 2 11:12:10 2000 -->
<pre>opened PVNI and PVNS to 40% </pre>
<!-- Author: RDK -->


<!-- Date: Mon Oct 2 11:13:30 2000 -->
<pre>arc cell on xchanger manifold now reads 13 ppm</pre>
<!-- Author: R. Sanders -->


<!-- Date: Mon Oct 2 11:44:05 2000 -->
<pre>East dry engine runs from FIX.  
Wet engine runs from FIX.  
North Dry has a problem with the air supply valve which appears to be electrical in nature.  The engine did attempt to run when commanded from FIX, however.  Supply pressure was about 75 psig, so couldn't tell valve condition.  Left all three engines enabled. 
 </pre>
<!-- Author: RLS -->


<!-- Date: Mon Oct 2 12:09:18 2000 -->
A/E Mix failed, investigation showed nothing definitive. Restarting the mix.
<!-- Author: Noe -->


<!-- Date: Mon Oct 2 13:30:23 2000 -->
At 1100, drained the liquid nitrogen out of the adsorber.  Started flowing warm 80F Nitrogen gas through it.  Blew down the helium side of the adsorber. Put vacuum pump on the helium side of the adsorber.
<!-- Author: R Sanders -->