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D.  Adjusting the diopter for difference in eyesight (Only in binocular models). 

 

1.  Using only the right eye, peer into the right-hand eyepiece (1) and adjust the fine focus (20). 

 

2.  Then using only the left eye, peer into the left-hand eyepiece and adjust the focus by turning 

the diopter adjustment (14) on the left eyepiece tube, until a sharp image is obtained. Do not 
adjust the focus with the fine focus knob.  

 

E.  Adjusting the aperture of the diaphragm. 

 

The diaphragm (9) should not be used to regulate the light intensity. Its function is to obtain a 
high resolution of the specimen and to provide contrast in the image. Smaller apertures will 
deliver higher contrast to image, although closing the aperture too much will reduce 
resolution. The best method to obtain the correct aperture of the diaphragm is to experiment. 
Suggested apertures for each objective are as follows: 
 
  

OBJECTIVE 

 

APERTURE OF IRIS 

 
  

4X 

 

 

From fully closed to 1/8 open. 

  

10X 

 

 

From 1/8 to 1/4 

  

40X 

 

 

From 1/4 to 1/2 

  

100X (optional)  

From 1/2 to 3/4 

 

F. Changing 

magnification. 

 

1.  Position the objective 10X (4) in the optical path. 

 

2.  This microscope has already been parfocalised, although it is possible that small differences 

exist between the objectives. It may then be necessary to adjust the focus slightly with the 
fine focus knob (20). 

 

3.  When changing to the 40X and 100X objectives (optional), it must be done with great care, 

making sure that the objectives do not scratch with the specimen slide causing damage to 
the front lens. 

 

4.  In order to obtain maximum resolution of the 100X (optional), it is necessary to apply 

immersion oil between the cover slip of the slide and the front lens of the objective.  

 

a.  Only a very small amount of immersion oil is needed, a drop should be enough. 

 

b.  If air bubbles appear they can be removed by gently rotating the nosepiece back 

and forth.  

 
c.  When viewing is complete, all parts that have come into contact with the oil must 

be cleaned using a soft cotton cloth, lightly dampened with Xilene. If the 100X 
objective is not cleaned, the oil will dry, and it will not be possible to see through it; 
permanent damage could also occur.  

 

NB. Immersion oil must ONLY be used with the 100X objective, as it is the only one 
specially prepared for it. If any other objective comes into contact with the oil, it must 
be cleaned immediately.  

 

 
 
 
 
 
 
 
 
 

-6- 

Содержание 18 LED Series

Страница 1: ...Instruction Manual 18 28 LED Series Copyright 02 02 Motic Microscopes European Division...

Страница 2: ...nosepiece 4 Objectives 16 Arm 5 Moveable stage clip 6 Specimen holder mechanism 7 Fixed stage clip 17 Rack stop screw 18 Specimen holder mechanism support screws 8 Stage 10 Condenser 19 Coarse focus k...

Страница 3: ...with additional notes applying specifically to other models in the series Unpacking All components of the microscope have been carefully packed to ensure they reach you in perfect condition We recomm...

Страница 4: ...Optimises illumination for enhanced resolution and image contrast 8 Focusing Knobs 19 20 Situated on both sides of the arm of the microscope the larger or coarse focusing knob initially brings the sp...

Страница 5: ...necessary to maintain the parfocality of the objectives 4 Variation in interpupillary distance necessitates the readjustment of the diopter scales C Focusing the microscope 1 Revolve the nosepiece 3...

Страница 6: ...4 in the optical path 2 This microscope has already been parfocalised although it is possible that small differences exist between the objectives It may then be necessary to adjust the focus slightly...

Страница 7: ...ble in shops selling photography equipment 1 Cleaning the eyepiece a Do not remove eyepiece 1 from eyepiece tube 14 b Clean only the outer surface misting the lens with breath c Dry by wiping with len...

Страница 8: ...g 3 is situated between the coarse focus knob 19 and the arm 16 Coarse focus tension is adjusted by the factory The optimum point of tension is that which permits the lightest movement of the coarse f...

Страница 9: ...e Nosepiece badly positioned Image too bright Turn until it clicks into position Reduce light intensity Poor resolution Objective lens dirty Eyepiece lens dirty Specimen slide upside down Cover slip o...

Страница 10: ...uired revision Warrantee All MOTIC microscopes are warranted against any manufacturing defect for a 5 year period Damage occurring by any unauthorised repair work or occurring through misuse or modifi...

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