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| 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 |
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| 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 |
Useful Information
- The volume of an outside gHe tank: 1600 cubic feet (V = 45306.95 L)
- 100 slm rate on Magnet FC is equivalent to ~ 192 LHe liters per day (i.e. assuming both LQ A and B are running)
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