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Fig. 1 - Objective Parts
Adjustable 
Ring 
Tightening
Ring 
Mark
Sleeve
Front
Sleeve
OPERATION (cont.)
6. Adjust the interpupillary distance by using the eyepiece   
    interpupillary slide adjustment.
7. Observe using the right eyepiece adjusting the coarse and fine  
    focus and adjust the diopter ring until image is clear and sharp.
8. Observe with the left eyepiece and adjust the diopter ring until  
    image is clear and sharp.
9. Rotate the fine focus adjustment when using other objectives.  
    NOTE: This instrument is equipped with patent objectives so   
    the precision or parfocalization is very high.    
10. If the image is in focus with the 10x objective, you can select  
      other objectives and observe the specimen even if the fine   
      adjustment knob has not been used by using the following   
      method (See Fig. 1):
     1. Unscrew the 40x or 100x  objective and remove from   
     turret.
     2. Remove the mark sleeve.
     3. Turn the ring on the objective to adjust its parfocal   
     distance.
     4. Re-insert the objective and compare with the 10x.
     5. Adjust until the 40x and 100x objectives image is clear.
USING THE CEDAR OIL
1. Drop some cedar oil on to the top of the 100x objective when the  
    100x objective is being used. NOTE: To maintain a good quality  
    image, rotate the turret right and left several times to eliminate  
    bubbles in the cedar oil. 
2. After finishing the observation, wipe off the cedar oil.
3. Do not use the 40x objective until you have wiped off all of the  
    cedar oil. 
 
OPERATION (cont.)
ADJUSTING THE CONDENSER APERTURE
1. The numerical aperture of the condenser should match the   
    numerical aperture of the objective being used.
2. To make sure that the objectives are imaging properly   
    (especially the 40x and 100x), follow this procedure:
     1. Take off the eyepiece.
     2. Look through the eyepiece.
          3. The smallest circle or light that you can see is the   
     eyepiece's exit pupil.
     4. Adjust the aperture of the iris diaphragm in the   
     condenser to 70% or 80% for the best contrast for   
     observation (See Fig. 2.).
Fig. 2 - Condenser Diaphram Aperture
Exit Pupil
of Objective
Aperture of
Diaphragm
TROUBLESHOOTING
ProblemP ossible CauseS olution
1. Image not clear. 1.Specimen is in incorrect  
        position.
2. Lens is dirty.
3. Cedar oil not placed on  
         immersion objective.
4. Bubbles in Cedar oil.
5. Cedar oil on 40x objective.
6. Iris diaphragm open too wide.
1. Re-position specimen.
2. Clean lens.
3. Put a drop of Cedar oil on  
     immersion objective.
4. Rotate turret several times to  
     eliminate bubbles.
5. Clean 40x objective.
6. Reduce size of iris diaphragm.
1. Condenser position is incorrect.
2. Lens is dirty.
3. Specimen is not placed level.    
1. Re-position condenser.
2. Clean lens.
3. Re-position specimen so it is level.
1. Iris diaphragm opening too small.
2. Position of condenser too low.
3. Lens is dirty.
1. Open iris diaphragm wider.
2. Raise condenser.
3. Clean lens.
1. Specimen is in incorrect position.1 . Re-position specimen.
2. Poor illumination.
3. Illumination not bright.
4. Cannot focus at high  
    magnification.
1. Stage is too high.1 . Re-position stage.5. Objective lenses touch  
    specimen.
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