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  1. Make sure the Liquefier is on "Run + Manual" mode
  2. Make sure the Dewar Pressure is about 6 psi or above
  3. Start opening the hand valves to vent from the ports (select the relevant one) shown in the following picture. Follow the next step immediately after this one.
  4.  Open the portable gas bottle to (say 10psi) > open the supply hand valve > Open vent for a while to bleed > Close the vent hand valve > Open SV01 from the PLC (close SV03)
    > Open REGX green hand valve > Open SVPA  (SVPB) on the PLC Liquefier A (or B) panel
  5. Let it to bleed and pressurize (via the external bottle) for some time and then measure the purity of that liquefier via SRV512A(or B)


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