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Troubleshooting

11

Fein 

TROUBLE

POSSIBLE CAUSE

SOLUTION

Field of view is dark 

even when light is on

The field diaphragm is not large enough.

Enlarge the field diaphragm

Condenser is too low.

Adjust the position of condenser.

The edge of the field 

of view is dark or not 

even.

The nosepiece is not in the right position.

Turn the nosepiece into the right 

position.

Stain or dust has accumulated on the lens such 

as condenser, objective, or eyepiece. 

Clean the lens.

Stain or dust is 

observed in the field 

of view.

Stains have accumulated on the specimen.

Clean the specimen.

Stains have accumulated on the lens.

Clean the lens.

Glare or hot spot on 

observed image.

Condenser is set too low.

Raise condenser.

Aperture iris diaphragm is closed too much.

Open aperture iris diaphragm.

Unclear image

There’s no cover glass on the specimen.

Add the cover glass.

The cover glass is not standard.

Use a standard cover glass with 

thickness of 0.17mm.

The slide is upside down.

Adjust the slide.

The immersion oil has accumulated on the dry 

objective.

Clean the objective thoroughly.

The immersion oil is not being used for oil 

objective.

Use immersion oil.

Air bubble is in the immersion.

Get rid of the air bubbles.

The aperture diaphragm is not opened 

correctly.

Adjust the aperture diaphragm.

Stain or dust has accumulated on the eyepiece 

lens.

Clean the lens.

The condenser is too low.

Adjust the condenser.

One side of the field 

of view is dark or the 

image moves while in 

focus.

The specimen is not fixed.

Fix the specimen.

The nosepiece is not in the right position.

Turn the nosepiece into the right 

position.

Condenser centered incorrectly.

Center the condenser.

The eyes feel tired 

easily. The right 

field of view doesn’t 

superpose with the 

left.

Interpupillary distance is wrong.

Adjust the interpupillary 

distance.

Eyepieces for the left eye and right eye are 

different.

Use the same eyepiece.

Содержание RB20-HD

Страница 1: ...Fein RB20 Biological Microscope User s Manual info feinoptic com...

Страница 2: ...Fein Microscope Components Eyepieces Condenser Objective Lens 1 Coarse Adjustment Fine Adjustment Tension Adjustment Microscope Frame Carrying Handle Condenser Adjustment Knob...

Страница 3: ...epiece Mechanical Stage Fein Microscope Components 2 Lock Screw Fixed Koehler Illumination Focus Arm Trinocular Head Vertical Adjustment Knob Horizontal Adjustment Knob Power Switch Light Adjustment K...

Страница 4: ...ck 1 and the frame at the front 2 as shown in the image at right Set the power switch to off O before replacing a bulb or fuse and wait until the lamp is cool The power switch is located on the side o...

Страница 5: ...4 Fein Microscope Assembly Follow the numbers below when assembling the microscope Eyepiece Condenser Objectives Power Cord 1 2 3 4...

Страница 6: ...il the condenser is aligned with the base and rotate the condenser to make the handle face forward Tighten the condenser lock screw 2 of condenser then raise the condenser with the up down knob to the...

Страница 7: ...ntil the eyepiece is flush with the eyepiece tube Tighten the eyepiece with M2 5 inner hexagon lock screw 3 1 3 2 Assemble the Eyepiece Take off the eyepiece tube cover 1 Insert the eyepiece 2 into th...

Страница 8: ...wly move the specimen holder lever back into place This will secure the specimen slide Rotate the X and Y axis knobs 3 on the stage until the center of the specimen slide is aligned with the objective...

Страница 9: ...e eyepieces 2 to fit your personal interpupillary distance The scale between the eyepieces 1 notes the interpupillary distance setting It s a good idea to note this number when working in a setting wh...

Страница 10: ...r use wipe the lens with a tissue moistened with microscope cleaning solution Using Filters Filters can increase the contrast in microscopy images The filter sits on top of the light as shown at the r...

Страница 11: ...e microscope is not in use the power cord can be placed in the storage box Press the position 1 of the storage box cover with thumb When you hear a click push up and put the power cord into the storag...

Страница 12: ...over glass The cover glass is not standard Use a standard cover glass with thickness of 0 17mm The slide is upside down Adjust the slide The immersion oil has accumulated on the dry objective Clean th...

Страница 13: ...xed correctly Adjust it The movable specimen holder is not fixed properly Adjust it The image moves obviously when touching the stage The stage is fastened incorrectly Fasten the stage correctly The L...

Страница 14: ...rrying handle side is down Locate the 4 rubber feet on the underside of the microscope Remove the rubber feet exposing the 4 screws securing the bottom plate of the microscope Gently lay microscope on...

Страница 15: ...th all 4 screws removed carefully remove the bottom plate exposing the internal components of the microscope Locate the 2 screws securing the LED bulb in place Using a screw driver remove the 2 screws...

Страница 16: ...the LED bulb replaced position the bottom of the microscope plate back onto the microscope frame Using a screw driver secure the bottom plate with the 4 set screws Place the 4 rubber feet over the to...

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