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ID Date Author Type Categoryup Subject
  9745   Mon Mar 24 10:41:46 2014 SteveUpdateVACRGA scan at day 50

 

 

Attachment 1: pd77m50dRGA.png
pd77m50dRGA.png
  9746   Mon Mar 24 19:42:12 2014 CharlesFrogsVACPower Failure

 The 40m experienced a building-wide power failure for ~30 seconds at ~7:38 pm today.

Thought that might be important...

  9749   Tue Mar 25 14:52:57 2014 steveUpdateVACvacuum is recovered

 Out gassing plus leak rate   0.15  mTorr / hour

 The pressure rose to 2.5 mTorr in 17 hours

 V1 was opened at 1:56pm

 VM2 opened at 2:10 so the RGA region is back to 1e-5 torr

 

Attachment 1: 17hrsNoPumping.png
17hrsNoPumping.png
  9757   Fri Mar 28 16:26:20 2014 steveUpdateVACRGA scan after power failure

Quote:

 Out gassing plus leak rate   0.15  mTorr / hour

 The pressure rose to 2.5 mTorr in 17 hours

 V1 was opened at 1:56pm

 VM2 opened at 2:10 so the RGA region is back to 1e-5 torr

 

 

Attachment 1: afterPowerFailure.png
afterPowerFailure.png
  9776   Wed Apr 2 16:34:15 2014 SteveUpdateVACMaglev controller needs service

Quote:

Quote:

 The date is correct on this monitor.

Last stored RGA scan data Dec 20, 2013

IFO pressure at CC1 5.8e-6 Torr

Valve configuration: Vacuum Normal, confirmable only by manual checking of position indicators and pressure gauge controllers  readouts

 

 The Osaka TG390MCAB maglev turbo pump's controller TC010M has passed the 40,000 hrs of operation. This triggered the " alarm" LED  warning light to come on. 

It is normal maintenance.  Maglev TP-1 is running perfectly.  Osaka will send us a loaner-controller that we can use while they do the std maintenance.

I'm thinking of ~ February to do this.

 We just received the loaner controller that will be swapped in it tomorrow morning.

The vacuum pressure will rise somewhat during this action.

  9782   Thu Apr 3 17:05:52 2014 SteveUpdateVACMaglev controller swapped

Quote:

Quote:

Quote:

 The date is correct on this monitor.

Last stored RGA scan data Dec 20, 2013

IFO pressure at CC1 5.8e-6 Torr

Valve configuration: Vacuum Normal, confirmable only by manual checking of position indicators and pressure gauge controllers  readouts

 

 The Osaka TG390MCAB maglev turbo pump's controller TC010M has passed the 40,000 hrs of operation. This triggered the " alarm" LED  warning light to come on. 

It is normal maintenance.  Maglev TP-1 is running perfectly.  Osaka will send us a loaner-controller that we can use while they do the std maintenance.

I'm thinking of ~ February to do this.

 We just received the loaner controller that will be swapped in it tomorrow morning.

The vacuum pressure will rise somewhat during this action.

 The loaner controller is swapped in. It has  520 Hz rotation speed.  This speed use to be 680 Hz with our old one.

Attachment 1: loanerControllerIn.png
loanerControllerIn.png
  9795   Thu Apr 10 16:09:29 2014 SteveUpdateVACRGA scan at 75% pumping speed

Quote:

 

 The loaner controller is swapped in. It has  520 Hz rotation speed.  This speed use to be 680 Hz with our old one.

 

Attachment 1: 520HzpumpingSpeed.png
520HzpumpingSpeed.png
  9834   Mon Apr 21 10:14:00 2014 SteveUpdateVACMaglev controller serviced

Quote:

 

 The loaner controller is swapped in. It has  520 Hz rotation speed.  This speed use to be 680 Hz with our old one.

 The  Maglev controller was serviced at Osaka Vacuum. It was swapped in this morning.

Attachment 1: ourControllerBack560Hz.png
ourControllerBack560Hz.png
  9876   Tue Apr 29 16:42:29 2014 SteveUpdateVACTP2 drypump replaced

Quote:

 

 TP2's fore line - dry pump replaced at performance level 600 mTorr after 10,377 hrs of continuous operation.

Where are the foreline pressure gauges? These values are not on the vac.medm screen.

The new tip seal dry pump lowered the small turbo foreline pressure 10x

TP2fl after 2 day of pumping 65mTorr

 TP2 dry pump replaced at fore pump pressure 1 Torr,  TP2 50K_rpm 0.34A

 Top seal life 6,362 hrs

 New seal performance at 1 hr  36 mTorr, 

 Maglev at 560 Hz, cc1 6e-6 Torr

 

Attachment 1: dryforepumpreplaced.png
dryforepumpreplaced.png
  9994   Tue May 27 11:00:43 2014 SteveUpdateVACRGA scan at day 111

 

 Rga scan at pump down 77, vacuum normal valve configuration, maglev rotation 560 Hz and day 111

Attachment 1: pd77d111RGA.png
pd77d111RGA.png
  10112   Mon Jun 30 10:06:39 2014 SteveUpdateVAClow on pneumatic pressure of vacuum valves

This morning valve condition: V1, VM1, V4 and V5 valves were closed. IFO pressure rose to 1.3 mTorr

It was caused by low N2 pressure.  Our vacuum valves are moved-controlled by 60-70 PSI of nitrogen.

When this supply drops below 50-60 PSI the interlock closes V1 valve. This is the minimum pressure required to move the large valves.

It is our responsibility to check the N2 cylinder pressure supply.

The vacuum valve configuration is back to VAC. NORMAL,  CC1  4.8E-6 Torr

 

PS: Bob says that the second cylinder was full this morning, but the auto-switch over did not happen.

Attachment 1: runoutofN2.png
runoutofN2.png
Attachment 2: lowN2.png
lowN2.png
Attachment 3: N2d100.png
N2d100.png
  10120   Wed Jul 2 11:47:26 2014 SteveUpdateVACbroken changeover regulator of N2 supply

Quote:

This morning valve condition: V1, VM1, V4 and V5 valves were closed. IFO pressure rose to 1.3 mTorr

It was caused by low N2 pressure.  Our vacuum valves are moved-controlled by 60-70 PSI of nitrogen.

When this supply drops below 50-60 PSI the interlock closes V1 valve. This is the minimum pressure required to move the large valves.

It is our responsibility to check the N2 cylinder pressure supply.

The vacuum valve configuration is back to VAC. NORMAL,  CC1  4.8E-6 Torr

 

PS: Bob says that the second cylinder was full this morning, but the auto-switch over did not happen.

 The TESCOM automatic changeover regulator  [ model ACS 012-1011 ] manifold is most likely  clogged. The new one will arrive 8-8-2014

This means that the IFO pressure may go up to a few mTorr when we change cylinder or V1 valve triggered because there is no nitrogen supply.

  10245   Mon Jul 21 10:51:06 2014 SteveUpdateVACN2 supply run out

Interlock closed valve V1, V4, V5 and VM1 when the nitrogen supply run out. The IFO pressure rose to P1 1 mTorr

In order to recover Vacuum Normal valve configuration I did the following:

Replaced both nitrogen cylinders. Confirmed pneumatic nitrogen pressure 70 PSI.   Opened valves V4 and V5

At P2 < 1 mTorr, Maglev rotation 560 Hz , V1 was opened.

VM1 was opened when CC1 pressure dropped below < 1e-5 torr

 

Please  take a look at the N2 cylinders pressure on Friday to insure that there is enough for the week end.

The daily consumption is 600-700 PSI

Attachment 1: outofN2.png
outofN2.png
  10419   Thu Aug 21 15:07:48 2014 SteveUpdateVACRGA scan at day 197

 

 

Attachment 1: RGAscan@d197.png
RGAscan@d197.png
  10524   Mon Sep 22 15:20:32 2014 SteveUpdateVACRGA scan at day 229

 

 

Attachment 1: RGA@229day.png
RGA@229day.png
Attachment 2: RGAscan229d.png
RGAscan229d.png
  10530   Wed Sep 24 08:40:29 2014 SteveUpdateVACVent has started

 

 Jam nuts checked. Oplev servos turned off. Particle count checked. Vertex crane functionality checked.

Attachment 1: vent77.png
vent77.png
Attachment 2: bvent77.png
bvent77.png
  10532   Wed Sep 24 13:28:48 2014 SteveUpdateVACvent is completed

 The vent is completed. ITMX was kicked up accidentally. Valve configuration: chamber open, RGA is pumped through VM2  Maglev

Attachment 1: ventiscompleted.png
ventiscompleted.png
Attachment 2: atAtm.png
atAtm.png
  10533   Wed Sep 24 16:02:58 2014 JenneUpdateVACvent is completed

[Steve, EricQ, Jenne]

ITMY and BS heavy doors are off, light doors are on.  Q is aligning the IFO.

  10536   Thu Sep 25 08:21:15 2014 SteveUpdateVACvent day 1

Quote:

[Steve, EricQ, Jenne]

ITMY and BS heavy doors are off, light doors are on.  Q is aligning the IFO.

 

Attachment 1: ventDay1.png
ventDay1.png
  10547   Mon Sep 29 09:11:25 2014 SteveUpdateVACvent day 5 RGA scan

 

 

Attachment 1: v77_bg-mag-d5.png
v77_bg-mag-d5.png
  10548   Mon Sep 29 10:29:25 2014 SteveUpdateVACRGA is not running

 

 The RGA time stamp was correct last at 20140527

 

  Rga stopped scanning at 20140530

Attachment 1: rgascanTimeStamp.png
rgascanTimeStamp.png
  10553   Tue Sep 30 16:18:57 2014 SteveUpdateVACpump down #78 has started

 

Q checked the earth quake stops of SRM and we put the ITMY & BS doors on. 

Attachment 1: pd78hastarted.png
pd78hastarted.png
  10555   Tue Sep 30 18:02:53 2014 SteveUpdateVACpump down #78 stops at 320 Torr

 

We  stopped pumping just short of 3 hours at 320 Torr.  Pumping speed was 2.7 Torr / min with partially closed RV1 and butterfly valve/

RP1&3 roughing pump hose is disconnected. Butterfly valve removed. The vac envelope is closed. 

Attachment 1: 3h.png
3h.png
  10556   Wed Oct 1 10:21:19 2014 SteveUpdateVACpump down #78 stops at 3.5 Torr

Quote:

 

We  stopped pumping just short of 3 hours at 320 Torr.  Pumping speed was 2.7 Torr / min with partially closed RV1 and butterfly valve/

RP1&3 roughing pump hose is disconnected. Butterfly valve removed. The vac envelope is closed. 

 This is our second stop. I will be back this afternoon.     IFO  P1 3.5 Torr

  

Attachment 1: pd78secondStop.png
pd78secondStop.png
  10557   Wed Oct 1 16:26:53 2014 SteveUpdateVACpump down #78 completed

 

 Pump down reached "vacuum normal" state. IFO _P1 pressure 1e-4 torr in 8 hrs actual pumping time

 PSL shutter is opened.

Attachment 1: pd78completedin25hrs.png
pd78completedin25hrs.png
  10559   Thu Oct 2 09:23:23 2014 SteveUpdateVACvent 77

Quote:

 

 Pump down reached "vacuum normal" state. IFO _P1 pressure 1e-4 torr

PSL shutter is opened.

 IFO_P1 pressure 1.6e-5 torr after 6 days at atm

 

PS: PSL sliding door 11 was left open overnight. The PSL particle count will reach room counts in 20 seconds at low speed of HEPA

Attachment 1: vent77SRMmoved.png
vent77SRMmoved.png
  10563   Fri Oct 3 10:10:37 2014 SteveUpdateVACcold cathode gauge reading switched

 

We have two cold cathode gauges at the pump spool and one  signal cable to controller. CC1  in horizontal position and CC1 in vertical position.  

CC1 h started not reading so I moved cable over to CC1 v

Attachment 1: CC1switched.png
CC1switched.png
  10568   Mon Oct 6 10:23:43 2014 SteveUpdateVACUnexpected power shutdown

Quote:

We had an unexpected power shutdown for 5 sec at ~ 9:15 AM.

Chiara had to be powered up and am in the process of getting everything else back up again.

Steve checked the vacuum and everything looks fine with the vacuum system.

PSL Innolight laser and the 3 units of IFO air conditions turned on.

The vacuum system reaction to losing power: V1 closed and Maglev shut down. Maglev is running on 220VAC so it is not connected to VAC-UPS.  V1 interlock was triggered by Maglev "failure" message.

Maglev was reset and started. After Chiara was turned on manually I could bring up the vac control screen through Nodus and opened V1

"Vacuum Normal" valve configuration was recovered instantly.

 

Chiara needs UPS 

It is arriving Thursday

  10579   Tue Oct 7 16:55:16 2014 SteveUpdateVACUnexpected sweaty valves

 Pump  spool valves V5, V4, V3 sweating a lot. VM3 and VC2 not so much.

They are VAT valves F28-62887-03, 11, 14 and so on ~15-16 years old.

 I'm speculating that some plastic is aging-braking down at the atmospheric-pneumatic side of valves.
The vacuum side is not effected, according to vacuum pressure readings.

May be some condensation from the small turbos? No

I'm looking for an identical valve to examine, but I can not find one.

We are using industrial grade 99.96% Nitrogen to actuate these valves.

Valves are not effected are  dry: VA6, V6, V7 and all annuloses.

 

Attachment 1: sweatyV5.jpg
sweatyV5.jpg
Attachment 2: sweatyV5f.jpg
sweatyV5f.jpg
  10584   Wed Oct 8 08:46:57 2014 SteveUpdateVACVAT valves actuator lubricant

Quote:

 Pump  spool valves V5, V4, V3 sweating a lot. VM3 and VC2 not so much.

They are VAT valves F28-62887-03, 11, 14 and so on ~15-16 years old.

 I'm speculating that some plastic is aging-braking down at the atmospheric-pneumatic side of valves.
The vacuum side is not effected, according to vacuum pressure readings.

May be some condensation from the small turbos? No

I'm looking for an identical valve to examine, but I can not find one.

We are using industrial grade 99.96% Nitrogen to actuate these valves.

Valves are not effected are  dry: VA6, V6, V7 and all annuloses.

 

VAT's answer:

Yes, our engineers are aware of this issue.  They say:

The pneumatic actuator needs lubricant as the O-ring (Viton) slides in the cylinder. Without grease the O-ring would be abraded and leaking after only a relatively few cycles.  The lubricant used in our pneumatic actuators is an emulsion of oil and Teflon flakes.   Vibration, many cycles and sometimes high temperature lead to the separation of the oil and Teflon.   That is apparently the issue you are seeing.

VAT is and has been testing and qualifying new lubricants, and this is one of the factors we are always looking to improve.  The formula we used 15 years ago in these valves seems to have performed reasonable  well.  Our formula today should perform even better.

We realize this explanation does not help you with these existing valves, but 15 years of service is not too bad is it? 

Steve -NOTE:bonnet seal is metal so there is no way this oil can get into our vacuum ( only if the bellow leaks )

  10587   Thu Oct 9 11:56:35 2014 SteveUpdateVACPower outage II & recovery

Quote:

Post 30-40min unexpected power outage this morning, Steve checked the status of the vacuum and I powered up Chiara.

I brought back the FE machines and keyed all the crates to bring back the slow machines but for the vac computers.

c1vac1 is not responding as of now. All other computers have come back and are alive.

 

 IFO vacuum, air condition and PMC HV are still down. PSL out put beam is blocked on the table.

  10590   Thu Oct 9 17:33:28 2014 SteveUpdateVACPower outage II & recovery

Quote:

Quote:

Post 30-40min unexpected power outage this morning, Steve checked the status of the vacuum and I powered up Chiara.

I brought back the FE machines and keyed all the crates to bring back the slow machines but for the vac computers.

c1vac1 is not responding as of now. All other computers have come back and are alive.

 

 IFO vacuum, air condition and PMC HV are still down. PSL out put beam is blocked on the table.

 We are pumping again. This is a temporary configuration. The annuloses are at atmosphere. The reset reboot of c1Vac1 and 2 opened everything except the valves that were disconnected.

TP2 lost it's vent solenoid power supply and dry pump during the power outage.

They were replaced but the new small turbo controller is not set up as the old TP2 was so it does not allow V4 to open. 

Tomorrow I will swap back the old controller,  pump down the annuloses and close off the ion pumps.

I removed the beam block from the PSL table and opened the shutter. CC4 has the real pressure 2e-5 Torr  

CC1 is not real.

Attachment 1: pumpingAgain.png
pumpingAgain.png
  10597   Fri Oct 10 14:41:04 2014 SteveUpdateVACPower outage II & recovery

Quote:

Quote:

Quote:

Post 30-40min unexpected power outage this morning, Steve checked the status of the vacuum and I powered up Chiara.

I brought back the FE machines and keyed all the crates to bring back the slow machines but for the vac computers.

c1vac1 is not responding as of now. All other computers have come back and are alive.

 

 IFO vacuum, air condition and PMC HV are still down. PSL out put beam is blocked on the table.

 We are pumping again. This is a temporary configuration. The annuloses are at atmosphere. The reset reboot of c1Vac1 and 2 opened everything except the valves that were disconnected.

TP2 lost it's vent solenoid power supply and dry pump during the power outage.

They were replaced but the new small turbo controller is not set up as the old TP2 was so it does not allow V4 to open. 

Tomorrow I will swap back the old controller,  pump down the annuloses and close off the ion pumps.

I removed the beam block from the PSL table and opened the shutter. CC4 has the real pressure 2e-5 Torr  

CC1 is not real.

 Tp2 is controlled by old controller. Annuloses pumped down. Valve configuration: "vacuum normal "

  Ion pumps closed at  <1e-4 mT

Attachment 1: recovery_poweroutage.png
recovery_poweroutage.png
  10599   Mon Oct 13 14:44:52 2014 SteveUpdateVACRGA scan pd78 -day 13

 Our first RGA scan since May 27, 2014 elog10585

 The Rga is still warming up. It was turned on 3 days ago as we recovered from the second power outage.

 

Attachment 1: RGAscan13Oct2014.png
RGAscan13Oct2014.png
  10741   Mon Dec 1 17:13:57 2014 SteveUpdateVACRGA scan pd78 -day 63

Quote:

 Our first RGA scan since May 27, 2014 elog10585

 The Rga is still warming up. It was turned on 3 days ago as we recovered from the second power outage.

 

 

Attachment 1: RGAscanD63.png
RGAscanD63.png
  10837   Tue Dec 23 14:33:24 2014 SteveUpdateVACChiara gets UPS

Quote:

Quote:

We had an unexpected power shutdown for 5 sec at ~ 9:15 AM.

Chiara had to be powered up and am in the process of getting everything else back up again.

Steve checked the vacuum and everything looks fine with the vacuum system.

PSL Innolight laser and the 3 units of IFO air conditions turned on.

The vacuum system reaction to losing power: V1 closed and Maglev shut down. Maglev is running on 220VAC so it is not connected to VAC-UPS.  V1 interlock was triggered by Maglev "failure" message.

Maglev was reset and started. After Chiara was turned on manually I could bring up the vac control screen through Nodus and opened V1

"Vacuum Normal" valve configuration was recovered instantly.

 

Chiara needs UPS 

It is arriving Thursday

 EricQ and Steve,

Steve preset the vacuum for safe-reboot mode with C1vac1 and C1vac2 running normal: closed valves as shown, stopped Maglev & disconnected valves V1 plus valves with moving labels.

(The position indicator of the valves changes to " moving " when its cable disconnected )

Eric shut down Chiara, installed APC's UPS Pro 1000 and restarted it.

All went well. Nothing unexpected happened. So we can conclude that the vacuum system with running C1vac1 and C1vac2 is not effected by Chiara's losing AC power.

Attachment 1: prepUP.png
prepUP.png
  10838   Tue Dec 23 15:37:32 2014 SteveUpdateVACTP3 drypump replaced

Quote:

Quote:

 

 TP2's fore line - dry pump replaced at performance level 600 mTorr after 10,377 hrs of continuous operation.

Where are the foreline pressure gauges? These values are not on the vac.medm screen.

The new tip seal dry pump lowered the small turbo foreline pressure 10x

TP2fl after 2 day of pumping 65mTorr

 TP2 dry pump replaced at fore pump pressure 1 Torr,  TP2 50K_rpm 0.34A

 Top seal life 6,362 hrs

 New seal performance at 1 hr  36 mTorr, 

 Maglev at 560 Hz, cc1 6e-6 Torr

 

 TP3 dry pump  replaced at 540 mT as TP3 50K_rpm 0.3A with annulos load. It's top seal life time was 11,252 hrs

 

 

  10843   Fri Dec 26 17:45:21 2014 SteveUpdateVACvac pressure rose to 1.3 mTorr

We run out of N2 for the vacuum system. The pressure peaked at 1.3 mTorr with MC locked. V1 did not closed because the N2 pressure sensor failed.

We are back to vac normal. I will be here tomorrow to check on things.

Attachment 1: noN2.png
noN2.png
Attachment 2: backtoVacNormal.png
backtoVacNormal.png
  10845   Sun Dec 28 07:29:16 2014 SteveUpdateVACvacuum is normal

Quote:

We run out of N2 for the vacuum system. The pressure peaked at 1.3 mTorr with MC locked. V1 did not closed because the N2 pressure sensor failed.

We are back to vac normal. I will be here tomorrow to check on things.

 ITMX damping restored.

Attachment 1: 3d.png
3d.png
  10968   Tue Feb 3 15:20:13 2015 Steve, KojiUpdateVACPneumatic pressure is being read again

[Koji, Steve]

Summary

The N2 pressure reading (C1:VAC-N2PRES) is now up-to-date after rebooting c1vac1.
The vaccum system is "Vacuum normal". We now have a space pressure transducer.

Introduction

Our vacuum valves are manipulated with 60~75 PSI of nitrogen. All the valves are configured to be closed in the case of low N2 supply pressure.
In order to avoid this safety shutdown accidentally triggered, we have two N2 cylinders to sustain the vacuum valves. When one cylinder goes to low
the mechanical valve switches over to the other cylinder.

We have the monitor channel for this (combined) cylinder pressure. One shoulbe be able to see periodical pressure variation when the auto cylinder
switch is operating. However, the nirogen pressure reading got stuck at 66 PSI on Dec.16, 2014 (See attached 60-day plot of N2 supply pressure). 

What we did

This morning we tracked down the cause of the trouble. We first closed the valves on EPICS and started to vary the N2 pressure.

Our first guess was the pressure transducer (Omega #236PC100GW) that was already 15 yrs old. We even has a sensor spare for replacement.
But it turned out that the direct voltage reading (to be 1mV/PSI) is changing correctly. The second guess was Omega Controller-Monitor
#DPiS32-C24 that is reading the voltage from the tranceducer. The display on this small black unit was changing corresponding to the
pressure change.

So our thought was
1) RS232C of the monitor unit is not working correctly
or
2) c1vac1 is not communicating with the monitor unit.

We wondered what could cause c1vac1 not communicating with the monitor unit, but we were afraid that some function got stuck
during either the nodus upgrade or chiara rebooting (or something else). So we decided to reboot c1vac1

In order to avoid any glitch in the main vacuum pressure, Steve disconnected some of the controller connectors for the closed valves.
We did this treatment before and it was successful.

Then c1vac1 was rebooted just by telnet and type reboot in the terminal.
Once the target is back in action, we noticed that the monitor value started to move.

Steve reverted the cables to the valves and operated the valves to recover "Vacuum Normal" state. Everything is now nicely settled.

Attachment 1: N2pressureReadingIsBack.png
N2pressureReadingIsBack.png
  11156   Sun Mar 22 18:42:40 2015 SteveUpdateVACvac pressure rose to 1.2mTorr

 

Quote:

We run out of N2 for the vacuum system. The pressure peaked at 1.3 mTorr with MC locked. V1 did not closed because the N2 pressure sensor failed.

We are back to vac normal. I will be here tomorrow to check on things.

We run out of N2 for the vacuum system 6 hrs ago. The pressure rose to 1.2 mTorr with V1 closed. The interlock worked! See Nirogen presure reading fixed at http://nodus.ligo.caltech.edu:8080/40m/10968

 

The vacuum interlock: Nitrogen pressure transducer is reading the pneumatic pressure continously at the pump spool and c1vac1 processing it. When it drops below 60 PSI it closes V1 gate valve and V4 & V5.  Gate valve V1 needs minimum 60 PSI to close. It is critical that V1 is closed before you run out of Nitrogen so the IFO pressure is contained.

 

IFO vacuum is back to Vac Normal. The MC is locked.

cc4 = 2E-6 Torr with VM1 open.

 

Daily N2 consumption measured to be 530PSI as 3 days on 3-27-2015 but note: it does vary !

I have seen it as high as 900 psi  The long term average ~750 psi

Attachment 1: NoN2.png
NoN2.png
Attachment 2: PressureReadingWorks.png
PressureReadingWorks.png
  11159   Mon Mar 23 10:36:55 2015 ericqUpdateVACPressure watch script

Based on Jenne's chiara disk usage monitoring script, I made a script that checks the N2 pressure, which will send an email to myself, Jenne, Rana, Koji, and Steve, should the pressure fall below 60psi. I also updated the chiara disk checking script to work on the new Nodus setup. I tested the two, only emailing myself, and they appear to work as expected. 

The scripts are committed to the svn. Nodus' crontab now includes these two scripts, as well as the crontab backup script. (It occurs to me that the crontab backup script could be a little smarter, only backing it up if a change is made, but the archive is only a few MB, so it's probably not so important...)

  11178   Fri Mar 27 10:38:40 2015 steveUpdateVACvac rack UPS battery replaced

Batteries replaced after 3.5 years with Amstron AP-1250F2,  8x 12V 6Ah

Quote:

APC Smart -UPS 2200   model: SUA2200RM2U   batteries were replaced by compatible RBC43, 8x  12V5A

 

Attachment 1: UPSvac.jpg
UPSvac.jpg
  11184   Tue Mar 31 09:03:32 2015 SteveUpdateVACRGA scan pd78 day 182

 

 

Attachment 1: RGApd78d182.png
RGApd78d182.png
  11243   Fri Apr 24 17:30:32 2015 JenneUpdateVACPressure watch script broken
Quote:

I made a script that checks the N2 pressure, which will send an email to myself, Jenne, Rana, Koji, and Steve, should the pressure fall below 60psi.

The script checking the N2 pressure is not working.  I signed into the foteee account to look at some of the picasa photos, and there are thousands of emails (one every 10 minutes for the past month!) with error messages.  Q, can you please make it stop (having errors)?

The error looks like it's mad about a "caget" command.  I don't have time to investigate further though.

  11249   Sat Apr 25 18:50:47 2015 ericqUpdateVACPressure watch script broken

Ugh, this turns out to be because cron doesn't source the controls bashrc that defines where to find caget and all that jazz that many commands depend on. This is probably also why the AutoMX cron job isn't working either. 

Also, cron automatically emails everything from stderr to the email address that is configured for the user, which is why the n2 script blew up the foteee account and why the AutoMX script was blowing up my email yesterday. This can be avoided by doing something like this in the crontab:

0 8 * * * /bin/somecommand >> somefile.log 2>&1

(The >> part means that the standard output is appended to some log file, while the 2>&1 means send the standard error stream to the same place as stdout)

I made this change for the n2 script, so the foteee email account should be safe from this script. I haven't figured out the right way to set up cron to have all the right $PATH and other environment stuff, such as epics may need, so the script is still not working. 

  11260   Mon Apr 27 14:37:55 2015 SteveUpdateVACN2 pneumatic pressure watch

 

Quote:

Based on Jenne's chiara disk usage monitoring script, I made a script that checks the N2 pressure, which will send an email to myself, Jenne, Rana, Koji, and Steve, should the pressure fall below 60psi. I also updated the chiara disk checking script to work on the new Nodus setup. I tested the two, only emailing myself, and they appear to work as expected. 

The scripts are committed to the svn. Nodus' crontab now includes these two scripts, as well as the crontab backup script. (It occurs to me that the crontab backup script could be a little smarter, only backing it up if a change is made, but the archive is only a few MB, so it's probably not so important...)

This watch script gives little time to replace N2 cylinder. When the regulated supply drops below 60 psi the cylinder pressure is 60 psi too.

It is more of a statement that V1 is closed and act accordingly. It's only practical if you are in the lab.

Rana pointed it out correctly that we need this message 24 hrs before it happens. This requires monitoring  of total supplies , not the regulated one.

So we need pressure transducers on each nitrogen cylinder, before the regulator. The sum of the two N2 cylinder when they are full 4000 - 4500 psi

The first email should be send out at 1000 psi as sum of the two cylinders. This means that you have  1 day to replace nitrogen cylinder.

 Most of the time the daily consumption is 750 +-50 psi   

However sometimes  this variation goes up   ~750 +-150 psi

  11261   Mon Apr 27 21:42:07 2015 ranaUpdateVACSummary pages

We want to have a VAC page in the summaries, so Steve - please put a list of important channel names for the vacuum system into the elog so that we can start monitoring for trouble.

Also, anyone that has any ideas can feel free to just add a comment to the summary pages DisQus comment section with the 40m shared account or make your own account.

  11262   Tue Apr 28 09:49:26 2015 SteveUpdateVACVac Summery Channels

 

 

       Channel        

                    Function                                          Interlock action           
            

C1:Vac-P1_pressure   

 IFO vac envelope pressure           at 3 mT close V1 and PSL shutter
C1:Vac-P2_pressure  Maglev foreline pressure                      at 6 Torr close V1 
C1:Vac-P3_pressure  annuloses    
C1:Vac-CC1_pressure  IFO pressure   at 1e-5 Torr close VM1
C1:Vac-CC4_pressure  RGA  pressure    
 C1:Vac-N2pres  valve's drive  pneumatic 60-80PSI    

 

at 55 PSI close V1, at 45 PSI close all 
 It  does not exist yet 2 N2 cylinder sum pressure  

 

  11264   Thu Apr 30 16:30:25 2015 SteveUpdateVACN2 pneumatic pressure watch set up

We have 2 transduser PX303-3KG5V   http://www.omega.com/pressure/pdf/PX303.pdf They  will be installed on the out put of the N2 cylinders to read the supply pressure.

I will order one DC power supply  http://www.omega.com/pptst/PSU93_FPW15.html      PSU-93

One full cylinder pressure is ~ 2400 PSI max so two of them will give us ~9Vdc

The email reminder should be send at 1000 PSI  =  1.8 V

 

 

 

 

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