Confluence may be unavailable from 17:30 on January 8th through 23:00 January 8th for upgrading hardware on our NetApp storage system. During this time the service may go offline. Please refrain from editing pages during this time to avoid losing your work.
For further information on the outage please visit the outage titled: Storage - Premium - nasUDC FAS9500 controller upgrade. Thank you for your patience as we complete this important work.
| Purpose | Instructions/Links |
|---|---|
| Cleaning (Liquefier) | |
| Cleaning (Purifier) | |
| Cleaning (HR3 piping) | Purging HR3 after a maintenance |
| Cleaning the buffer tank | Cleaning the Buffer Tank on the Cryoplatform |
| Cleaning the filters F1, F2, F3, and the filter before MV101 | Cleaning the filters F1, F2 at HR3 Cleaning the filter at MV101 |
| Fills | Filling LN2 to the purifier using the outside LN2 tank |
| Taking purity measurements at various places in the system |
| Purpose | Instructions/Links |
|---|---|
| System Startup Procedure | |
| QT PLC (only) restart procedure | |
| Cooldown | |
| For planned power outage | |
| Taking purity measurements at various places in the system |
| Issue | Reason | What to do? |
|---|---|---|
| If QT-HMI has an alram window opened and showing the codes 603 and 602 | It's a known warning from some software development → close the window | HR3 Tripped Warning Message |
| If the QT-HMI got frozen | How to fix the QT-HMI if its screen got frozen | |
| If the Dewar level indicators have large fluctuations | Level sensor tubes are contaminated | Fixing dewar level indicator FNAL Approved procedure: https://seaquest-docdb.fnal.gov/cgi-bin/sso/ShowDocument?docid=10401 |
| Coldheads blocking alarm | Possible contamination or cold heads have been running so long without any intake gHe for a while | |
| If FCA and FCB shows strange values (like 71.11slm on both) | Probably a consequence of radiation damage | How to fix if the outlet flows of Liquefiers are showing strange values |
| If the coldhead compressors show Alarm due to high temperatures of LCW | Higher outside temperatures | How to clear the coldhead compressor LCW temperature alarm |
