WP6647
Bubba, Dave:
The end station instrument compressed air signals from both EX and EY were removed from the cell phone alarm system. Two channels per building, the signal channel and its error channel. Alarm system was restarted at 11:24 PDT.
Kyle (Tasks part of WP #6644) ~1015 hrs local -> I valved-in the Vertex RGA to the combined vacuum volumes of the Vertex+YBM+XBM while these volumes were being pumped by their respective turbo pumps. PT120's response is attached (1 hour of second data). "From my head" 10-9 torr/10-5 L = 10-4 torr/L of gas accumulated in the unpumped ~5L RGA volume in 14 days? So, no significant air leaks in the RGA joints. ~1045 hrs. local -> I energized the Vertex RGA filament (note: I am confused with the Pfeiffer software's naming of my connect/scan session with the included phrase "Airdemo..". The other versions of this software don't do this and I makes me question as to whether I am actually connected to the Vertex RGA (h0rgacs) or am I connected to their "Simulator" or virtual RGA in this connect/scan session?
Correction to this obvious typo error: (10-9 Torr)(10+5 L) = 10-4 Torr*L of accumulated gas.
Laser Status: SysStat is good Front End Power is 33.98W (should be around 30 W)
HPO Output Power is 165.2W
Front End Watch is GREEN
HPO Watch is GREEN
PMC: It has been locked 5 days, 23 hr 12 minutes (should be days/weeks)
Reflected power = 16.97Watts
Transmitted power = 62.97Watts
PowerSum = 79.94Watts.
FSS: It has been locked for 3 days 18 hr and 40 min (should be days/weeks)
TPD[V] = 2.846V (min 0.9V)
ISS: The diffracted power is around 2.7% (should be 3-5%)
Last saturation event was 5 days 4 hours and 57 minutes ago (should be days/weeks)
Possible Issues:
Nothing unusual to report.
Concur with Ed, all looks normal.
The HVAC controls upgrade install has been completed at both end stations, therefore I have turned off the air compressors at both end stations. Sorry for all the alarms.
Note that the tour that I had scheduled (see WP #6641) is canceled. At some point, I expect to be in the LVEA, the VPW, the Control Room and my office. I expect to be here approximately 2 hours and will make a comment to this entry when I leave.
Turbo pressures at 1630 hrs. local - Vertex inlet 7.0 x 10-8 fore line 4.1 x 10-3 XBM inlet 6.0 x 10-8 fore line 1.2 x 10-3 YBM inlet 1.0 x 10-7 fore line 2.2 x 10-3. Also, I found that the Emergency Egress Door in the VPW was being held open via the positive room pressure so I closed it. VBOD RGA turbo cooling fan was of due to a tripped GFCI wall receptacle - I reset it and it seems fine. 1900 hrs. local - > Kyle leaving site now.
Bubba and Vern on site for NOVA Film Crew Shoot with Jana Levin.
Working in peace and quiet. Vertex pressure is looking good @ 2.7e-7 Torr.
Testing to make sure aLOG is still up.
FRS 8166 Filament #1 on the Pfeiffer RGA seems to be burned out. It turns off a second after turning it on. I switched to filament #2. It would not stay on either. The default emission current was set to 2 mA. I lowered it to 0.1 mA. The filament (#2) stayed on at that value. Then I raised to 0.3 mA (you have to click in a different window to activate the new setting btw). Then I raised to 1 mA where the filament automatically turned off. Went back to 0.3 mA and that's where it's sitting for now. Pfeiffer suggested we let it warm up and slowly ramp up to 2 mA. These steps are sometimes needed when the filament hasn't been used for a long time (not the case here). Something else is going on. The error message we were getting from the filament turning off was "emission error" or E002. Pfeiffer said a burned out filament will usually yield a different type of error, but sometimes these fail such that the filament still registers a current - when the broken filament cools it reconnects. Here is a manual describing emission error: ftp://ftp.aerodyne.com/ACSM/ACSM_Pack/Quadara2/Manuals/English/QUADERA/quadera.pdf We verified the RGA turbo is ON and pumping out the RGA volume. One theory is that during the bake of the RGA (during oven load bake) we sprung an air leak and now the turbo can't keep up with the leak rate which is causing a high head pressure - too high for a filament to tolerate. Note that one of the two turbos on VBOC is at 33C, which is a little high (two fans are blowing on it). The other is at 27C. Also, the foreline pressure is reading 0.018 Torr. Normally at 0.016 or 0.017 Torr. We should add HV pressure gauges to the system for times like this. Also, one of the electronics units has a recessed pin socket. The other two spare units yielded the same error (filament turning off almost immediately). Maybe instead of replacing the SRS with Pfeiffer we should replace the Pfeiffer with SRS because of these pin issues due the frequency of removing and reinstalling the electronics in between bakes.
J. Kissel, NOVA Film Crew I've modified the main displays on the front wall at the request of the NOVA film crew. The lower screen is displaying the GW150914 waveform and the background of the DTT session showing the Live Sensitivity on the Upper screen has been changed to black. There is zero intention of this being permanent, but I figure there will be no harm in leaving it as such over the weekend since the content normally displayed on these screens only has meaning when we have light in the arms, no one is intending to commission the corner station over the weekend, and there'll be no operations specialists on shift over the weekend. So, it should just be the film crew, Dr. Levin, and their site liaison, and they all want it this way! I'll restore the displays to normal Monday.
NUC2 and NUC3 configurations has been restored to O2 Observation Ready.
Gerardo, Jonathan, Patrick We used dataviewer to plot the raw, second and minute trends for the following channels from May 18 2017 16:38:59 UTC - May 18 2017 20:38:59 (attached): H0:VAC-EY_Y3_PT410A_PRESS_TORR H0:VAC-EY_Y3_410_PIRANI_INTLK H0:VAC-EY_Y3_410_PWR_REQ H0:VAC-EY_Y3_410_PIRANI_INTLK should only be either 0 or 1. In the second trends it takes a value of ~ 2.2. In the seconds trends H0:VAC-EY_Y3_PT410A_PRESS_TORR jumps from 0 to 1, which is not realistic for a pressure reading.
Using h1nds1 port 8088.
More second plots of anomaly, window is 14 hours long, event is about 8.5 hours, unrealistic data noted at CS, EY and EX, not noted (but only small sample of channels checked) at Mids.
Other subsystems affected, but only sampled a few channels from FMCS and ASC.
Activities: all times in UTC
As of 23:00, end of day shift coverage:
Starting CP3 fill. LLCV enabled. LLCV set to manual control. LLCV set to 50% open. Fill completed in 274 seconds. TC B did not register fill. LLCV set back to 21.0% open. Starting CP4 fill. LLCV enabled. LLCV set to manual control. LLCV set to 70% open. Fill not completed after 3600 seconds. LLCV set back to 33.0% open.
Manually filled CP4 from control room at 100% open. Took 11 minutes. Lowered to 36% open (from 33%).
Interesting pressure trends on X & Y beam manifolds. See my previous aLOG about rate of rise test followed by pumping on just turbos (IPs valved out). PT180 (y-arm) trend has shifted and headed up! Does this mean the fault is in IP6 and not a leak?
Valving in IPs and valving out turbos for the night.
Also interesting is how PT170 steps "up" its reading when reacting to the, as yet unkown internal, gauge "step" change (voltage change?) while PT180 steps "down" when this unknown internal gauge change happens. I wonder if the electronics use varying voltages for various pressure ranges etc?
Those steps that I think you are referring to are me hard closing GV 5,7.
