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When the fridge is in Hold Cold Mode, it means we have a liquid in the fridge nose and holding target material in there. In that case, we have to keep the target material to preserve the paramagnetic centers. In the Hold Cold Mode, you will see the fridge parameters as follows: 

  1. Run and Bypass valves are closed. 
  2. Separator Flow set at 7slm 
  3. The GV bypass can be set at 8% or fully open. It does not matter what the GV bypass opening is. 

You can see the Fridge Parameters on the Strip Charts Fridge 2x3 (fnal.gov):

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