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Operational Settings: QT_Operational_Settings.pdf


Procedures

  1. Filling LN2 on Purifier Dewar
  2. QT System Starting Procedure
  3. Liquefier Cleaning when Dewar contains LHe
  4. Cleaning QT purifier Helium-space
  5. Cleaning QT purifier LN2 space
  6. What to do when cold-heads "blockage" warning appear?
  7. LHe Dewar cleaning procedure


Useful information

  1. The volume of an outside gHe tank: 1600 cubic feet
  2. QT recommendation to keep system minimally pressurized: ~20 psi
  3. 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
  4. 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

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






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