Optika Italy IM Serie Manual De Instrucciones página 19

13. Troubleshooting
Review the information in the table below to troubleshoot operating problems.
PROBLEM
I. Optical Section:
LED operates, but field of view remains
dark
Field of view is obscured or not evenly
illuminated
Dirt or dust is visible in the field of view Dirt/dust on the specimen
Image looks double
Visibility is poor
• Image is not poor
• Contrast is poor
• Details are indistinct
One side of the image is unfocused
II. Mechanical Section:
Coarse focus knob is hard to turn
Focus is unstable
III. Electrical Section:
LED doesn't turn on
Brightness is not enough
Light blinks
IV. Observation tube:
Field of view of one eye does not match
that of the other
V. Microphotography:
Image edge is unfocused
Bright spots appear on the image
CAUSE
Power supply is unplugged
Brightness is too low
Revolving nosepiece is not correctly
engaged
Filter holder, polarizer or analyzer are
partially inserted
Dirt/dust on the eyepieces
Aperture diaphragm is stopped down
too far
The field diaphragm is not well cen-
tered
Revolving nosepiece is in an incorrect
position
Aperture diaphragm is too closed or
too open.
Dust or dirt on lenses (objectives, eye-
pieces)
Focus is not even
Revolving nosepiece is in an incorrect
position
Specimen is not in a flat position
Tension adjustment ring is too tight
Tension adjustment ring is too loose
Power supply not connected
Brightness setting is too low
Power supply not well connected
Interpupillary distance is incorrect
Incorrect diopter adjustment
Your view is not accustomed to micro-
scope observation
To a certain extent it is due to achro-
matic objectives features
Stray light entering in the microscope
through eyepieces or camera viewfind-
er
Page 19
SOLUTION
Connect
Set brightness to a proper level
Make sure that the revolving nose-
piece clicks properly into place
Insert or remove the filter slider
Clean the specimen
Clean the eyepieces
Open aperture diaphragm
Set the diaphragm according to Koe-
hler settings
Move the nosepiece to a click stop
Adjust aperture diaphragm
Clean thoroughly
Specimen holder is not flat. Move the
specimen to a flat position
Move the nosepiece to a click stop
Place the specimen in a flat position
on the stage
Loosen tension adjustment ring
Tighten tension adjustment ring
Check for proper connection
Adjust brightness
Check for proper connection
Adjust interpupillary distance
Adjust diopter
Upon looking into eyepieces, try look-
ing at overall field before concentrating
on specimen range. You may also find
helpful to look up and into distance for
a moment before looking back into mi-
croscope
To minimize the problem, set the aper-
ture diaphragm in a proper position
Cover eyepieces and viewfinder with a
dark cloth