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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



Turning OFF HR3 after purging:

  1. Press the Emergency Stop and right after that close V17 (Flow on FI01 will be zero)

     2. Close SVSAMPLE

     3. Close VHSV and the rotatable valve on top of the line

     4. Close Vmup

     5. Close the bottle


Purging the He returning line from HR3 to the tank:

  1. Close V14
  2. Open MV102
  3. Slowly open V17
  4. After purging some He from the line, keep V17 opened slightly to have a flow and connect a purity meter to the vent

After purging: 

  1. Close V17 
  2. Close MV102

Purging the He inlet line from the tank to HR3:

  1. Close MV103
  2. Purge from MV101
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