Operational Settings: QT_Operational_Settings.pdf
Procedures
- Shut Down and Restart Procedures
- Filling LN2 on Purifier Dewar
- QT System Starting Procedure
- Liquefier Cleaning when Dewar contains LHe
- Cleaning QT purifier Helium-space (pumping-purging the purifier)
- Cleaning QT purifier LN2 space
- What to do when cold-heads "blockage" warning appear?
- Fixing dewar level indicator (related to (9))
- LHe Dewar cleaning procedure
- Cold-helium Circulation Procedure (Cooldown Transferline)
- Cleaning gHe outside tank using the purifier
- Resolving Liquefier Blocking Alarm
Useful information
- The volume of an outside gHe tank: 1600 cubic feet
- 100 slm rate on Magnet FC is equivalent to ~ 192 LHe liters per day (i.e. assuming both LQ A and B are running)
- QT recommendation to keep system minimally pressurized: ~20 psi
- 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).
- HR3.docx
To check LCW parameters: https://e906-gat1.fnal.gov/data-summary/e1039/slow-cont-acnet.php
(click on NM4LCW or select )
To check HMI parameters: https://e906-gat1.fnal.gov/data-summary/e1039/target-QT-HMI.php (select:
P&IDs
P504 HR3 P&ID 20191209 SSG.pdf
P504 P&ID (AO) Feb 26, 2020 -reprint.pdf
Manuals
Items-Purchased
- https://www.automationdirect.com/adc/shopping/catalog/process_control_-a-_measurement/pressure_sensors/pressure_transmitters/spt25-20-v30d
- https://www.automationdirect.com/adc/shopping/catalog/cables/pneumatic_solenoid_valve_cables_-a-_connectors_(square_din_style)/8mm_(din_43650c)/sc8-5t