Versions Compared

Old Version 1

changes.mady.by.user M. A. Ishara Fernando

Saved on

compared with

New Version 2

changes.mady.by.user M. A. Ishara Fernando

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.
  1. Set the liquefier to "Manual" mode.
  2. Navigate to the liquefier page on the HMI screen.
  3. Open SVP(A/B)
  4. Navigate back to the "Overview Screen".
  5. Start pre-cool phase:  Open VPC → Open VJV(A/B) → Monitor TX1, TX2, TX3
  6. After ~8mins: Open magnet-bypass (hand-valve right next to the magnet flow controller) → Open VJVT on the HMI screen.
  7. After ~1min: Close VPC and monitor magnet pressure and maintain ~5psi on the QT dewar using REGX (green) hand valve.
  8. Try to regulate the pressure difference of ~4psi between the magnet and the Dewar, using REGX all the time.
  9. After a couple of minutes, you will observe that the magnet pressure drops down suddenly and stay around ~1.4-1.5 psi (this indicates that LHe is flowing to the magnet after the pre-cooling of the last part of the transfer line).
  10. Fill the magnet until the level shows ~44% → Open VPC → Close VJVT → Close VJV(A/B) → Close Magnet bypass hand valve. Make sure that you leave the VPC open to capture all the boil-off from the transfer line until it is warm (check TX1).
  11. Navigate to the liquefier page on the HMI screen and close SVP(A/B) → Switch the Liquefier to "Liquefy mode".