| 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 |
