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Conditions: HR3 is OFF

  1. Close MV101 (supply) and MV102 (return) 
  2. Connect a He cylinder to L3 (Helium purge inlet) - Regulate 10 psig
  3. Open Vmup
  4. Ensure V30, V35, V9a, V21a, V11A, V14, SV03, REGX are open
  5. Open VHSV and the rotatable valve on the top of the line
  6. Check the gauge and make sure that it reads 10 psig
  7. Start HR3
  8. Slowly open V17 and vent

Measuring the purity:

Measure from SVSAMPLE or at the vent near V17

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