Replace the Analysis Port Filter

A porous metal filter is located in each analysis port. Using a contaminated filter on an analysis port may extend the time required to achieve a vacuum at that port. More importantly, the contaminant may adsorb or desorb during analysis, affecting the analysis results. A contaminated filter on an analysis port may cause a leak test to fail (if the contaminant outgasses) or cause a free space reading to be much lower than normal.

  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. Use a wrench to remove the sample tube fitting from the analyzer.

  1. Remove and replace the filter and O-ring.
  2. Reinstall the analysis port fitting. Securely tighten with a wrench to prevent leaks during evacuation.
 
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