Page History

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1. Shut Down and Restart Procedures
2. Turning OFF and Restarting HR3
3. Helium Liquefier (QT) System Summary
4. How to fill LN2 to the Purifier and Magnet LN2 spaces
5. How to fix the QT-HMI if its screen got frozen
6. Fixing dewar level indicator
7. How to restart the QT PLC
8. How to fix if the outlet flows of Liquefiers are showing strange values
9. HR3 operations
10. Filling LN2 to the purifier using a portable Filling LN2 on Purifier Dewar
11. QT System Starting Procedure
12. Liquefier Cleaning when Dewar contains LHe
13. Cleaning QT purifier Helium-space (pumping-purging the purifier).              Cleaning QT purifier Helium-space (OLD)
14. Cleaning QT purifier LN2 space
15. Fixing dewar level indicator (related to (9))
16. LHe Dewar cleaning procedureDewar Cleaning Procedure (using the transfer line)
17. Cold-helium Circulation Procedure (Cooldown Transferline)
18. Cleaning gHe outside tank using the purifier
19. Resolving Liquefier Blocking Alarm when Liquefier is on Liquefy Mode
20. Resolving Liquefier Blocking Alarm when Liquefier is on Idle Mode
21. Purifier LN2 Fill Procedure-updated-labels.pdf ( Please use this updated one, or the original one on docdb 10337 by Jordan Bohn)

• • 03 Jun 2023 Now, EV-100-N is not functioning well. So, Jordan recommends using the HCV-13 while playing with EV-100-N. Purifier LN2 Fill Procedure.pdf 

1. LN2 Shield Fill Procedure-updated_labels.pdf( Please use this updated one, or the original one on docdb 10337 by Jordan Bohn)
2. LHe fill procedure using a QT dewar
3. LHe fill procedure using a commercial dewar
   Important Cooldown > Liquefying modes information
4. QT Dewar Cooldown Mode from Room Temperature
5. Bringing the Dewar Pressure down in Liquefy/Idle mode

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1. The volume of an outside gHe tank: 1600 cubic feet (V = 45306.95 L)
2.  The pressure increase in the gHe tank per tube (in the tube trailer) is 10psi (i.e. 10 psi difference per tube)
3. 100 slm rate on Magnet FC is equivalent to ~ 192 LHe liters per day (i.e. assuming both LQ A and B are running)
4. QT recommendation to keep system minimally pressurized: ~20 psi
5. Running from 40 psi down to 20 psi would produce about 80 liquid litters and we should be able to do that in about 10 hours (assuming both LQ A and B are running).
6. Putting a 2200 psi gas bottle into the system will produce 8 liquid liters per bottle.
7. HR3.docx (It's a copyright of QT-technology. Please do not make it public. )

The following page contains information on the production and transfer efficiency studies

LHe Production InformationRate Optimization
LHe Transfer Efficiency

To check LCW parameters: https://e906-gat1.fnal.gov/data-summary/e1039/slow-cont-acnet.php 
(click on NM4LCW or select F:NM4LCWFLOW F:NM4LCWP1 F:NM4LCWP2 F:NM4LCWP3 F:NM4LCWT1 F:NM4LCWT2 )

QT LCW requires are 7.8kW of cooling per coldhead compressor, will less than 77F on water inlet and at least 6L/min of flow. 

To check HMI parameters: https://e906-gat1.fnal.gov/data-summary/e1039/target-QT-HMI.php  (select:TI502 TI504 TI506 TI508 TI510 for both Liquefier A and B)P&IDs
P504 HR3 P&ID 20191209 SSG.pdf
P504 P&ID (AO) Feb 26, 2020 -reprint.pdf

Manuals

1. Helium Compressor Manual.pdf
2. Cold_Head_Hot_Swap_Procedure.pdf
3. prosense_qps.pdf

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