Electron microscopy
  
Pneumatic Apertures
- Practical Electron Microscopy and Database -
- An Online Book -
Microanalysis | EM Book                                                                                   https://www.globalsino.com/EM/        

This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers.
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If the pneumatic aperture in GIF system does not work, we need to check:
         i) The presence of pressurized air.
         ii) The pneumatic connections.
         iii) There should be puffs of air escaping from the Gatan Instrumentation Bin (GIB) when the aperture size in the FilterControl software is changed. In this case, the electronics controlling the pneumatics is working.
         iv) Apply a high pressure (≤ 100 N/cm2) to the colored hoses coming from the aperture mechanism to loose the o-rings if the GIF has not been used for a long time because the o-rings may stick.

 

 
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