HEPI Accumulator Pressure Check & Recharge

All accumulators  were in good shape with little to zero drop in pressure since last checked--26 Jan 2016.

Of course you can't do this task without impacting the accumulators.  After checking the HAM5 return unit, the valve was leaking upon pulling the gauge and I could not get it to reseat.  The schraeder valve was replaced.  Several units lost more than the usual when the gauge did not come off the valve cleanly(quickly) and subsequently had to be rechanged.  There were several units which were marginal in January and although they were still in okay range, they were charged up to the top of the acceptable range.

The values have been recorded in T1500280 and I will update this on the DCC after today's HEPI maintenance.  Levels I suspect will be different after the full shutdown and additionally I'll do a thorough purge of the resistors which also could affect the Reservoir Levels.  Also, motor greasing is about a year old.

OPS Eve Shift Summary

TITLE: 06/07 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: None
SHIFT SUMMARY:  Still recovering from power outage over the weekend.  Got through Initial Alignment with only mild struggling.  Digital video camera 18 connection error gave us grief during MICH_DARK locking (see screenshot).  Also see screenshot of IFO Align for a starting place tomorrow as we expect the alignment to drift for some time due to thermalizing.  DIAG_MAIN has been giving an error for H1:PEM-EX_WIND_ROOF_WEATHER_MPH all night.
LOG:

23:46 Darkhan to EY investigating PCal

0:34 Darkhan back, PCalY back up and running

1:40 Dave restarts camera script

2:00 Model restart for ITMx and ITMy for PI model changes
 

CP7 alarm

Talked to John about a CP7 Pump Level alarm we were getting.  He advised me to turn the 'Manual Setting' to 72%.

Note: According to Gerardo, who called back after John, he did not get an alarm notification by phone about this as he should have.  Someone needs to check the machine responsible for these calls.

I did not get a text or email alarm either.

No CP7 texts for me

GV7 sagged

GV7 has sagged since John and I reinstated normal operational state this morning by re-applying 50-60 psi pressure upward on piston and removing locking pin. Not sure how far down it has sagged. I suggest waiting to run laser until it's boosted back up Tuesday morning by someone from the vacuum group.

I'll fix tonight and come in an hour later in the morning

3 hour trend of CS instrument air range between 62 psi - 82 psi.  

As found, 55 psi < GV5, GV6, GV8 < 60 psi, GV7 = 38 psi -> Adjusted all for > 60 psi. 

Note: the LVEA was quiet and I could easily hear the displaced air exiting the pneumatic manifold vent port.  I would guess that the gate had sagged several inches (foot?) based upon duration of audible venting and the convincing "THUNK" of it hitting the hard stops.  

Thank you, Kyle!

CP7 oscillating

I had to restart the TwinCAT code for h0vacex and h0vacey to add back the Inficon gauges that were disabled during the power outage. This reset the PID controls for CP8 and CP7. CP8 is back on PID but CP7 has been oscillating (see attached). At this point I am going to leave it on manual at 85% open before I leave. Someone from the vacuum group might want to monitor it.

CP7 setpoint was raised to 94% because it overfilled last Friday during transition to generator power. Reboots today reset it to nominal 92%, which causes the PID loop to close valve, warming up the transfer line, and then it has a hard time catching up.  

ALS Fiber Polarization Adjusted after Recovery

J. Driggers, J. Kissel, J. Warner

While beginning recovery of the IFO, Jenne noticed that the Y arm fiber polarization was high (showing ~24% of input light rejected, where < 5% is where we want to be). We followed instructions similar to what can be found in the OPS Wiki. Since the percent-of-rejection channels are buried deep in the heart of the ALS MEDM screen jungle, I pulled the channels,
      H1:ALS-X_FIBR_LOCK_FIBER_POLARIZATIONPERCENT
      H1:ALS-Y_FIBR_LOCK_FIBER_POLARIZATIONPERCENT
into a StripTool, which made it easier to by-eyeball, hand-tune the value via the tiny CDS laptop we were using. Also, there's no rhyme or reason to which of the three knobs to use; we just slowly turned all the knobs in both directions until we started to see the rejected light value go down sub-5%. While there, we also brought the X-arm below 5%.

The fiber polarization tuning box was turned off once we were done. 

SEI and SUS Re-Isolated and DAMPED+ALIGNED after power outage

J. Kissel,  J. Warner, H. Radkins

SEI recovery:
After Hugh finished his 6-month maintenance of the HEPI accumulators (stay tuned for more detailed aLOG), Jim followed turning on HEPI pump stations. Once pump stations were started, front-ends, and the guardian machine were up and running, there was little-to-no trouble bringing up the SEI systems. All platforms are isolated as normal now.

SUS recovery: 
Once front-ends and the guardian machine were up and running, I brought most suspensions up via guardian. We had a little trouble with the dolphin network in the corner station while reseting the CDS IOP "software" watchdogs, but thankfully it was as simple as turning *on* the dolphin switches in the corner (they'd just been missed in the infrastructure turn-on phase). 

It was a little unnerving that the start-up guardian state for the SUS is ALIGNED, which means that as *soon* as all watchdogs are clear, things light up and start sending stuff out to the DAC. If everything works well -- and this time it did -- this is fine, but I'd kinda prefer that the start-up state is SAFE, so that the user can control the speed at which things come up. Some thing to consider.

Also, many thanks to Cheryl and Jenne, who helped us get the IMC locked and happy.

All SUS are damping as normal now (Rana and Evan made sure that the new damping filter settings on the QUADs has been restored correctly), and we're in the process of getting the rest of the IFO alignment to a happy state.

MX Instrument Air alarms

There has been an instrument air alarm periodically for MX since the start of my shift.  It seems to have come back after the power outage to a lower level than previous (~60 instead of ~80 psi).  I talked to Gerardo about it, and he didn't seem to worried.  I have emailed Bubba to look at it tomorrow.  OPS takeaway: it is OK to ignore this alarms (which is a MINOR alarm) for now, unless it becomes MAJOR.

L4C Interface tests

David.M, Filiberto.C, Jenne.D 

All of the L4C interfaces (D1002739) were tested using the L4C Interface test plan at (T1600185). These were the chassis with serial numbers s1600252, s1600253, s1600254, s1600255, and s1600256. All of the channels were working fine except for the L4C 3 & 4 channels on chassis s1600253 which had the incorrect frequency response. On closer expection we noticed that this board was missing the capacitor located at C8 (see the schematic) for both channels. These capacitors have now been added. The chassis was retested and all channels are now functioning properly. I've attached the test reports for each chassis.  

LVEA Temperatures 2016 June 3-6

Attached are the temperature and RH plots from the data logger inside the LVEA 3IFO Desiccant Cabinet during the outage. Being inside a closed cabinet with a continual nitrogen boil-off is not a true measurement of the LVEA temperature, but it should give an idea as to how the temperature changed over the weekend.

[from an email by Jeff Bartlett]

Temporarily forced PT100 Cold Cathode gauge on

Per Kyle's request I have temporarily forced the PT100 Cold Cathode gauge on in the Beckhoff controls software (see attached).

Thanks!

Ops Day Shift Summary

(All time in UTC)

Quick Summary:

14:00 Chris S. to both end stations to retrieve generators

15:19 Fil + Alfredo to End stations to turn on facility related stuff

15:28 Hugh begins working on WP#5910

16:00 John et al. to LVEA

          TJ + Richard to End stations to power up front end computers

         Locking gate valves open (John, Chandra)

16:05 Switching from generators to site power

16:15 PSL, AUX online

          Fil back

16:19 Chandra + John out

          Corner station Beckhoff running

16:30 Chandra to MX, EX to plug in VAC system

16:34 Richard + TJ done with EX, going to MX, EY

16:41 Patrick restoring EPICS IOC h0epics2

16:49 epics gate way is up -- nds1 is wokring (Dave) -- It doesn't work by the way

17:00 Richard + TJ back

          Richard + Jason turning on high voltage (CER upstairs)

17:09 CDS front end is ready to go

          Guardian medm starts up

17:10 Jason + Ed recovering PSL

17:16 Nutsinee to mezzanine and LVEA to recover TCS CO2

          All corner station high voltage is on

17:20 PCal EX recovery (Darkhan)

17:43 PCal EY recovery (Darkhan)

18:01 Corner station Dolphins are alive.

         Hugh done at EX, heading to EY

18:10 EX ESD is good to go

18:15 Coner station HEPI pump is good (Jim)

         DAC restart (Dave)

18:17 Power cycle Beckhoff chasis and PD amplifier (Fil)

18:22 TCS CO2 is ready and fired (NK)

18:26 Fil out of EY, heading to EX

18:42 Fil restarted EX End station 2 Beckhoff chasis

18:49 Hugh back from EY. Jim recovering HEPI pumps.

18:55 Richard to LVEA to reset PSL emergency stop.

          Hugh and Jim to EY to restart BRS.

          SEI is good to go

19:02 All SUS M0 DAMP P,Y are messed up. Rana recovered the setting. Diff accepted in safe.snap (FM1, FM2, FM5, FM6, FM8, FM10 gain = -1)

19:08 Rich + Terra to beer garden (ITMX ESD driver work)

19:22 BRS are up (Hugh+Jim)

19:34 Rich+Terra out

19:43 Terra to beer garden

19:49 Betsy to EX to powercycle EX PUM BIO I/O chasis

          Terra out

20:00 Jeff B to EX > EY > LVEA

20:02 Fil reboot beckhoff chasis

20:13 Darkhan back. PCal Y not working

20:16 Betsy back

20:23 Rich + Daniel puttin chasis back (beer garden)

20:29 Chandra to Mid staions and End stations to install some plugs.

20:32 Jeff B out of EX, heading to EY

20:38 Fill and Patrick to EY (Beckhoff problem)

20:45 Hugh+Krishna+Michael to EY (BRS)

20:56 Jason+Ed out

21:02 JeffB out

21:05 Rich+Daniel out

21:16 Begin IMs alignment. Referencing values from alog26916.

21:35 Hugh+Krishna+Michael to EX (BRS)

21:36 Rich to beer garden (ESD electronics)

21:50 Jeff B to LVEA to obtain weekend temperature data

21:53 Chandra to BSC8 to take pictures of RGA.

22:03 Jeff B out.

22:06 Fil+Patrick back. EY Beckhoff is up and running.

22:20 All IMs are restored to their good values.

          Jenne working on aligning MC optics.

22:32 Kyle to retrieve a piecec of electronics

22:39 Kyle back

21:55 Disable ESD to do PI measurement (Terra+Carl -- both end stations)

23:02 IFO_ALIGN slide bars put back in place. Referencing values from alog27557.

problem with ITMX M0 BIO

Evan, Rana, Sheila

This afternoon there was a problem with the ITMX M0 BIO.  The TEST/COIL enable indicator was red, and setting H1:SUS-ITMX_BIO_M0_CTENABLE to 0 and back to 1 could not make it green.  Evan tried power cycling the coil driver, which did not work.  We were able to reset this and damp the suspension again by setting the BIO state to 1, it seems that anything other than state 2 works. 

This might be a hardware problem that needs to be fixed, but for now we can use the suspension like this.