Changing the high pressure dewar

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Changing the High Pressure Dewar (on the 700)

  1. Make sure that an experiment is not being collected on the 700.
  2. Close the gas valve on the old/empty dewar.
  3. Close the two valves on the gas line which goes to into the NMR lab.
  4. Unscrew the transfer line from the dewar.
  5. Attach the transfer line to the gas valve of the new dewar.
  6. Open the two values on the gas line to the NMR lab.
  7. Open the gas valve on the dewar. It will be noisy at first but will subside quickly.
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