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The procedure written by Jordan Bohn (docdb 10337 ) needs to be updated.


Magnet Shield Fill: Routine Fill


Checklist:

  1.  LL-106-N Shows < 75%.
  2.  The level probe readout in the magnet power supply rack (cryoplatform) is ON, and the output from it to the PLC is ENABLE.
  3.  PT-106-N is below 25 psig.
  4.  PT-110-N reads a value between 20psig-60psig.
  5.  Ensure EV-200-N is closed. It may be left open from an earlier time, since the purifier was filled.
  6.  Ensure VNFA on the purifier overview LN2 is CLOSED.
  7.  LN2 tank (Tank #54) outside has > 20 inwc level.
  8.  HCV13 is CRACKED OPEN (on 12/21/2023 we decided to leave it at this position).


Steps:

  1.  Open EV-102-N
  2.  Open EV-100-N
  3.  Monitor TE-104-N, TE-107-N, TE-108-N, and they should reach < 90 Kelvin.
  4.  When the temperatures reach below 90 Kelvin, Open EV-105-N to 100% (input 100% + press 'Enter')
  5.   Close EV-102-N.
  6.  Monitor PT-106-N and ensure it doesn't reach above 25psig. If it reaches 25psig, then STOP the filling by Closing EV-100-N and Opening EV-102-N, then Close EV-105-N (input 0% + press 'Enter').
  7.  Monitor LL-106-N reaching 90%.
  8.  Close EV-100-N
  9.  Open EV-102-N
  10.  Close EV-105-N  (input 0% + press 'Enter').
  11.  After ~4 hrs, ensure TE-104-N, TE-107-N, TE-108-N are at room temperature and then Close EV-102-N.



Warm Magnet Shield Fill


Checklist:

  1.  LL-106-N Shows ~0%.
  2.  The level probe readout in the magnet power supply rack (cryoplatform) is ON, and the output from it to the PLC is ENABLE.
  3.  PT-106-N is below 25 psig.
  4.  PT-110-N reads a value between 20psig-60psig.
  5.  Ensure EV-200-N is closed. It may be left open from an earlier time, since the purifier was filled.
  6.  Ensure VNFA on the purifier overview LN2 is CLOSED.
  7.  LN2 tank (Tank #54) outside has > 20 inwc level.
  8.  HCV13 is CRACKED OPEN.


Steps:

  1.  Open EV-102-N
  2.  Open EV-105-N to 100% (input 100% + press 'Enter').
  3.  Open EV-100-N
  4.  Monitor TE-104-N, TE-107-N, TE-108-N, and they should reach < 90 Kelvin.
  5.  When the temperatures reach below 90 Kelvin, then Close EV-102-N.
  6.  Monitor PT-106-N and ensure it doesn't reach above 25psig. If it reaches 25psig, then STOP the filling by Closing EV-100-N and Opening EV-102-N, then Close EV-105-N (input 0% + press 'Enter').
  7.  Monitor LL-106-N reaching 90%.
  8.  Close EV-100-N
  9.  Open EV-102-N
  10.  Close EV-105-N  (input 0% + press 'Enter').
  11.  After ~4 hrs, ensure TE-104-N, TE-107-N, TE-108-N are at room temperature and then Close EV-102-N.



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