Kissel started the charge measurements on the SUS ETMs this morning around 8am.  However, I just discovered that both ITM and the ETMx ISI's have been tripped since ~4am, so the ETMx data isprolly junk.  Boo.  Not sure why this wasn't addressed this morning.  ISI's are back up now.

The new idle state, which doesn't do anything (idle), was connected to both DOWN and READY. When the ISC_LOCK Guardian had DOWN requested, it would jump from DOWN to READY as it normally would, and then it would move to IDLE and back to DOWN and repeat. I just removed the path from READY to IDLE to stop this loop, but this makes getting to IDLE a bit akward since it has to pass through DOWN. Whomever made the state may want to reconsider the organization of the path, but this works for now.

   Topped off the PSL Crystal Chiller with 125ml of water. This is a normal top off after swapping the filters yesterday. Both chillers are running well.  

Added H1:SUS-ETMY_PI_OSC_DAMP_OSC_LINE2_COSGAIN and H1:SUS-ETMY_PI_OSC_DAMP_OSC_LINE3_SINGAIN to the exclude list and updated the channel list.

Added 138 channels and removed 56 channels (see attached).

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.

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
 

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.

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 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.

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. 

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

Summary

On Friday, Pcals were turned off for the June 3-5 power outage (LHO alog 27558).

• Today it was verified that PcalX and PcalY settings were restored with the default values stored in the SDF system.
• The PcalX laser was turned on with a switch on the MEDM screen and the power was set to 5.0 V (nominal). Then we closed the OFS loop.
• The PcalY laser switch was also set to ON and laser power was set to 5.0 V (nominal), but the photodetectors' (TxPD, OFS PD and RxPD) readings indicated that the laser was not on. Currently we are investigating the problem, for now the PcalY laser switch was set to OFF.

Details

After finding out that PcalY PDs are not measuring any power I went to the End-Y and checked following:

• all of the power switches on a PcalY modules are set to ON,
• all of the cables are properly connected,
• +12 / -12 V is coming to Pcal laser power cable,
• +24 / -24 V is coming to AOM driver power cable,
• all other power indicator LEDs on the front panels of the modules were on,
• Pcal laser is not on,
• Shutter is not powered (the power indicator LED on the shutter is off).

From this limited information and under the assumption that nothing is broken in the Pcal system, one of possible sources of the issue might be that control signals are not reaching the Pcal Interface module through an EtherCAT connector. The laser on/off and power level (5.0 V) signals should come through this interface (the Pcal Interface Chassis back-side board circuit is given in D1400149).

The issue in currently under investigation.