Baking both CC1 at 85 C for 60 hrs did not help.

The temperature is increased to 125 C and it is being repeated.

COD_Sugar napolion is due to Steve:  Item delivered, model CMG-SCU-0013, sn G9536

Vacuum Operation Guide is up loaded into the 40m-wiki. This is an old master copy. Not exact in terms of real action, but it is still a good guide of logic.

Rana has promissed to watch the N2 supply and change cylinder when it is empty. I will be Hanford next week.

The cable tray holder cross beam is removed and cut short for good access to seismometer.

The Guralps were swapped.

What I did:   turned DC power off at 1X1,  hand carried them,  centered  each leveling bubbles, gently locked the jack screws and turned power back on.

ETMY at the east end now has CMG-T40-0008, sn T4157 as channel C1:PEM-SEIS_STS_1_Y_OUT_DQ.........

ETMX at south end now has CMG-T40-0053, sn T4Q17 as channel C1:PEM-SEIS_STS_2_Y_OUT_DQ.........

Conclusion:  Guralps are fine.  X  cable is bad. It was bad 6 months ago when it was made.

We can still swap the 3ft short cables at the granite base if Rana has not done it.

Koji and Steve,

The result: bad Guralp x-arm cable.

I will swap the short cables tomorrow at the base.

Local earthquake 3.8 Mag tripped only PRM

Vac monitor is not communicating.

PSL HEPA turned on
 

Short 46" long cables at the base plates were swapped. Their solderings looked horrible.

This cable actually worked at 5-5-2015

Bad cable at ETMY station now.  The new cable should be a little bit longer ~52"

I'm getting ready change the Newport Ultima U100-AC to SS-Polaris-K1  LOW DRIFT MIRROR MOUNTS

Note: there is only one lens in the PRM lunching path (  only realized later ) , so the spots are large ~ 3 mm at PRM qpd and ~4.5 mm at BS qpd

The spots are well centered.

Atm3,  the spots were well centered yesterday ( the PRM is misaligned in pitch and retsore does not work today )

Lenses removed from oplev beam path at elog entry 11246

Koji and Steve succeded rebooting C1vac1, C1vac2 and pressure reading is working now

More tomorrow .........

Koji and Steve,

One computer expert and one vacuum expert required.

Atm 1,  problem condition: gauges are not reading for a week, error message "NO COMM" and all computer LEDs are green

Atm 2, prepare to safe reboot:

            a, close V1, disconnect it's power cable and turn off Maglev, wait till rotation stops

            b, close PSL shutter ( take adrenaline if needed )

            c, close V4, V5, VA6 valves and disconnect their cables. "Moving" error message indicating this condition.

               V1 is not showing "Moving" because its power cable disconnected only! It will show it if its position indicator cable is disconnected too. There is no need for that.

               These valves closed and disabled will not allow accidental venting of main volume.

            d, push reset, reseting c1vac2 will reset c1vac1 also, wait ~ 6 minutes

"Vacuum Normal" valve configuration was restored after succesful reboot as follows:

             a, reconnect cable and open V4 and V5 at P2 & P3 <1e-1 Torr

             b, observe that P2  < 1e-3 Torr and retsart Maglev

             c, wait till Maglev reaches full speed of 560 Hz and reconnect-open V1

             d, reconnect-open VA6 at P3 <1e-3 Torr

NOTE: VM1 valve was locked in open position and it was not responding before and after reboot

          Error message on Atm2 is indicating this locked condition: "opening VM1 will vent IFO"

          This is a fauls message. The valve is frozen in open position. We need a softwear expert help.

Last supper before departing at  "Grazie" El Portal. All the best on your journey!

Keven is our regular janitor is out for a few weeks.

The sub is careful- gentel Mario. We wiped arouind the vertex cambers north side on the floor and east arm racks.

The laser went off around 11am yesterday. It was turned on

Jessica Pena, Megan Kelly, Eve Chase and Ignacio Magana received 40m specific basic safety traning today.

Mario wiped the floor around the ETMX chamber today.

Pasadena got 0.2" of  rain on Saturday. Temperatures were high with high humidity since than.The ants were back in the Control room east side benches.

We have started using TERRO Liquid Ant Baits in January 2015   This worked very well to this point.

Tree new packages were opened  yesterday and the ants are gone.

We can conclude that these baits must be replaced after 6 mounts.

The liquid baits contains BORAX  and it is safe.

Thursday morning I found the control room emergency exit not locked.

Please check the doors when leaving the lab , specially when you are the last one out.

Specially heavy items: old analoge scope or hardware loaded boxes......etc

 The table cover section holding crossbars are not evenly spaced.

You have to center each cover section on the cross bar so it is supported on both sides !

I will clean up on this table tomorrow

We just had fire alarm trigged avacuation of the 40m lab.

It turned out that the CES building second floor sensor caused this action.

Sorry Jamie, I accidentally deleted your elog entry #11453

Koji could pull out easily 11 of the wires  from their socket.

Koji soldered new 50" long cable for the Y station.

Atm1,  New short-50" long cable was installed at ETMY end ( Y-station ) between Guralp-B ( MIT ) and granite base.

Interface box input 2 was left connected to cable 1 and input 1 to cable 2. This plot shows no change.

Atm2, Than I swapped the two long cables at the interface box

                                                                                                   Now the signal seems to be ok <2 Hz,

                                                                                                                                                       >2 Hz some problem exist.

I will look for more bad soldering tomorrow. How many cables did she make?

We have to redo this cable also

1. Yesterday we did put the vacuum system into safe to reboot mode  for the ethernet card swap.
2. Atm1, IFO pressure
3. Atm2, as prepared valve configuration where " moving " means closed and disconnected

The wasp nest will be removed tomorrow from from the out side of the east arm window.

The resonant frequency of the newly arrived gravity bee detector is not known.
 

Atm1, Before cable swap

Atm2, The long cables were swapped at the input of the interface box.

We can conclude that the problem is in the interface box

I wonder if interface box input 3 is wired?

The Guralp ADC  interface box  D060506 is ready for inspection. It is in front of 1X1 with open top and running.

Obviously c7 as 1 miroF cap is missing.

Koji and Steve,

We took transferfunctions of each channel yesterday. They were identical ?. I will check the cables from ADC to DAQ next.

PMC needed to be locked manually.

I'm making a new long cable. Both connector ends of this X arm long cable were terrible. It was removed from the cable tray yesterday.

The Y arm Guralp is running fine. The interface box is open in front of 1X1 on a cart and it is alive!    Please be aware of it !

Alessandra Marrocchesi received 40m specific basic safety training yesteday.

Ara! Onara suru tsu-mori datta keh-do, un-chi ga de-chatta...

The new cable was made this way:

Pins were located with ohm meter for locations and both ends were cut off.The Belden 1424A cable than was soldered to DB37 and Guralp circular connector " IKPT06F16-26S-ND "

This cable will connect the ADC interface box CCD# DO 60506 to Guralp seismometer at the sout end.

The Guralp's each 3 axies will be connected through a twisted pair to the differential input op amp

Gur  ouput  vertical axis + -  on circular connector   A, B  to DB37 pin 1 &20

Gur output        N/S axis + -  on circular connector   C, D to DB37 pin 2 & 21

Gur output       E/W axis + -  on circular connector   E, F to DB37 pin 3 & 22

Power +12 VDC  from DB37 pin 29 to Gur circular connector pin c (lower case)

Power -12 VDC  from DB37 pin 24 to Gur circular connector pin  M Note: this connection was absent at the first test of this cable!

Ground              from DB37 pin 10 to Gur circular connector pin b (lower case)

Summery: I may destored the opamp  at the Guralp A at the south end.

I moved Gur A from ETMX to ETMY . Gur B at ETMY was disconnected and its cable  connected to Gur A

It seems that Gur A is alive. I will stop using A and B names after we stop swapping components.

Rana, Steve

We investigated the ETMY oplev table set up and did not find a red herring.

Two 2 years  vs one day plot below.

ps: thanks  Q for fixing  DTT, the auto scaling is not working at sampling rate 10 min and 1 hr period??

FOSC-2-64-50-L-1-H64F-2
Single mode coupler, 2x2, 1064nm +/-20nm, 50/50 ratio, 900micron loose tube jacket, Hi1060flex fiber, 1m fiber length, FC/APC connectors

Four of these items ordered yesterday from http://afwtechnologies.com.au/sm_coupler.html

New stage can hold the correct polarization.

DRAWING CORRECTION:  Post block height was lowered to be 1.88" from 2.0"

The ETMY enclosure feedthrough - north is installed. The sealing material is hard to work with.

The upper empty blocks will be replaced by something soft to make changing cables easy.

TP2 dry fore pump sn PLE10082 was replaced at pressure 717 mTorr,  TP2 50K rpm 0.33A @ 112,677 hrs

Top seal life was 8,160 hrs

Model  SH110, Sn LP1007L556 was installed. It's fore line pressure after 30 minutes of running 38 mTorr, TP2 turbo at 50K rpm 0.18A

ETMY optical table enclosure feedthrough- south is in. Now it is time to see how air tightness increases performance.

I doubt we'll see any effect until we carefully seal the holes. If there's 1 hole in your boat it still sinks.

No damage. The BS sensor UR 0.220 V has been low for some times.

Dataviewer does not work for long term trend.

ETMY - Guralp (B-MIT) was covered with copper lined can yesterday afternoon. It's long cable is connected to ADC interface box input 1

The vertex Trillium was covered just ~2 days before Ignacio left.

ETMX - Guralp (A-Caltech) is not covered. The long 40m cable is disconnected at the the south end.

CC4 cold cathode gauge jump triggered interlock to close VM1 valve to protect the RGA.

The IFO pressure is 1e-5 Torr

Vac normal was recovered by opening VM1

The cold cathode gauge is back to normal. cc4 is the last gauge is "functioning"

MKS is not responding. The spare controller and gauges are back for repair.