Hitachi Microscope & Magnifier S-3400N User Manual

4.1.1 

4 - 5 

(9) 

Check to see that the Wehnelt is securely fitted. After that, use a spray or blower to 
completely remove any lint and other debris attached to the filament assembly. 

 

 

 

Fig. 4.1-10    Cartridge Filament Assembly 

 
(10)  Attach the filament assembly to the electron gun. Fix it by turning the holding ring 

clockwise.  

 

 

 

Fig. 4.1-11    Installing the Cartridge Filament Assembly 

 
(11)  Set the gun onto the column. 
 

 

 

Fig. 4.1-12    Installing the Electron Gun Unit 

 
NOTICE:  Unload the electron gun after O-ring returns to the groove when it has come off from 

the groove. 

 

 CAUTION:  When setting the gun, take care not to pinch the O-ring.    The gun should be 

lowered by both hands until it stops.    If the gun is released halfway, your 
fingers might be caught in it.