Hitachi Microscope & Magnifier S-4800 Manual De Usuario

2 - 2

2.1    Control Knobs and Switches on Main Unit 
 
2.1.1  Main unit (Column) 
 
Fig. 2-2 shows the appearance of the S-4800 main unit (type I). 
 

 

 

Beam monitor 
preamplifier 
 
Beam monitor aperture 
 
Secondary electron 
detector (Upper) 
 
Objective movable 
aperture 
 

     

 
Specimen exchange 
device 
 
Evacuation control panel

Electron gun 
 
Gun valve 
 
Anti-contamination 
trap dewar   
 
Secondary electron 
detector (Lower) 
 
Specimen stage