Replace the Analysis Port Filter

  Before replacing a port filter, ensure that the port valve is closed. Observe the analysis system schematic to verify valve status.
  To avoid analysis problems, the new filter and O-ring must be clean. Wear gloves when performing this task. Do not touch the parts with bare hands.
  1. Remove the dewar and sample tube (or plug).
  2. Close the sample valve.
  3. Use a wrench to remove the sample tube fitting from the analyzer.

  1. Remove and replace the filter and O-ring. If the O-ring and filter are stuck in the port, use a fingernail or plastic instrument to remove them. Using a metal instrument may scratch the sealing surface, causing a leak.
  2. Reinstall the analysis port fitting. Securely tighten with a wrench to prevent leaks during evacuation.