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• PRESS the Vacuum key on the CRT Screen to
check the vacuum status of the instrument. It
should read Ready at the top center of the CRT
screen. VERIFY the Ion Getter Pump (IGP) value
is lower than 20 Log.
• If it READS Start-Up, contact FEMR staff for
assistance and wait for the vacuum to improve
before the microscope can be used. Note: Do
NOT use the microscope (i.e., do NOT turn on the
filament) if the IGP value is 20 Log or higher.
• PRESS the Ready button to RETURN to the TEM
Brightfield page (black arrow).
• VERIFY the Apertures: Condenser Aperture (C2) is
at 4; Objective Aperture is 3 and the Selected
Area Electron Diffraction (SAED) Aperture is out
(position of the lever is to the right) except when
performing electron diffraction.
Condenser Aperture
2. Specimen Loading and Holder Insertion/Removal
Note: the specimen holder, airlock, and CompuStage are delicate, precisely machined
components. Never exert significant force during any step of this procedure. Doing so
may result in serious damage to the instrument or holder.
A. Removing the Sample Holder from the CompuStage (Column)
Objective Aperture
2017.07.07
Selected Area Aperture
3
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