Unitron Versamet 4, Руководство пользователя, Страница: 20 / 22

VERSAMET 4 INVERTED METALLURGICAL MICROSCOPE
UNITRON
73 Mall Drive, Commack, NY 11725 • 631-543-2000 • www.unitronusa.com
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TROUBLESHOOTING
Under certain conditions, performance of this unit may be adversely affected by factors other than defects. If a
problem occurs, please review the following list and take remedial action as needed. If you cannot solve the
problem after checking the entire list, please contact your local dealer for assistance.
OPTICAL
PROBLEM CAUSE SOLUTION
The illumination is on, but the
field of view is dark.
The bulb is burnt out. Replace it with a new one
The brightness is set too low Set it to the appropriate position
The field diaphragm is not open enough or
closed
Open the field diaphragm
Too many filters are in the optical path
Reduce them to the minimum required
number
The edge of the field of view is
obscured or not evenly
illuminated.
The nosepiece is not in the located position
Turn the nosepiece into the position where
you can hear it engaged
Dirt or dust has accumulated on the lens
(objective or eyepieces)
Clean the lens
Light path selection slider is not in the right
position
Pull it into the right position
The color filter, polarizer or analyzer is not
inserted fully
Push it in all the way
Dirt or dust is visible in the field
of view
Dirt/dust on the specimen Replace with a clean specimen
Dirt/dust on the eyepiece Clean the eyepieces
The image is not clear
Cover glass on the specimen slide Clean the specimen
The specimen is not vertical to the objective Adjust it
The nosepiece is not in the correct position Turn the nosepiece into the correct position
The aperture diaphragm is not open correctly Adjust it
The light path selection slider is not in the
correct position
Push it into the correct position
Visibility is poor

Image is not sharp

Contrast is poor

Details are indistinct
The objective is not correctly engaged in the
light path
Turn the nosepiece into the engaged position
the aperture diaphragm is opened or stopped
down too far in brightfield observation
adjust the aperture diaphragm properly
The lens (condenser, objective, eyepieces)
are dirty
Clean it thoroughly
One side of the image is dark,
blurred or it moves while
focusing
The objective is not in the center of the light
path
Insure the nosepiece is in the “clicked”
position
The specimen is not correctly positioned on
the stage
Reposition the specimen on the stage
The eyes tire easily; the right
field of view doesn’t
superimpose with the left
Interpupillary distance is incorrect Adjust the interpupillary distance
Diopter adjustment is incorrect Adjust the diopter
The eyepiece for the right eye is different from
the left one
Use the same eyepieces