background image

17

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

Problem

Possible Cause

Solution

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.

18

Summary of Contents for AY11240

Page 1: ...ify the customer accordingly BARSKA reserves the right to replace any product which has been discontinued from its product line with a new product of comparable value and function This warranty shall...

Page 2: ...ther 1 2 Dry Weather 1 1 4 After use cover the instrument with the plastic dust cover 5 If instrument is to be stored for an extended period of time remove the eyepiece and oculars and store in a mois...

Page 3: ...parts before assembling 2 Attach 4x 10x and 40x objectives to revolving turret 3 Place the specimen on the stage and secure with spring clips NOTE The cover glass must face upward the thinner glass is...

Page 4: ...stment knob until the image is in sharp focus When using other objectives rotate the fine focus adjustment until the image is in focus Model AY11240 Model AY11238 6 MODEL AY11228 AY11232 MICROSCOPE US...

Page 5: ...TION 1 Remove components from package identify all parts before assembling 2 Tighten the knob on the stand to prevent the elevator from sliding down 3 Fix the binocular body on the stand with the tigh...

Page 6: ...ft eyepiece and bring a specific point into focus using the focus knob b By turning the diopter ring adjustment for the left eyepiece bring the same point into sharp focus c Then bring the same point...

Page 7: ...ATION 1 Remove components from package identify all parts before assembling 2 Tighten the knob on the stand to prevent the elevator from sliding down 3 Fix the binocular body on the stand with the tig...

Page 8: ...both eyes at the same time the diopter ring may need adjustment DIOPTER RING ADJUSTMENT 1 To adjust the eyepiece for viewing with or without eyeglasses and for differences in acuity between the right...

Page 9: ...e 16 PARTS LIST OPERATION 1 Remove all components from package Identify all parts before assembling instrument 2 Attach 4x 10x and 40x objectives by screwing into revolving turret Tighten and secure t...

Page 10: ...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...

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