Scanning Electron Microscope EM-30PLUS Operating Manual
110
6.2.3 Methods for Aperture Setting
1. Positioning of Aperture
Aperture is inside of knob, having 4 holes in all. Electron beams pass through the hole.
2. Method for Aperture Hole Setting
Fix the knob by pulling the knob in the direction of No.1 and turning it counter-clockwise
as No. 2 of figure below.
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