Troubleshooting - Optika Italy B-380 Serie Manual De Instrucciones

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 sharp.
• Contrast is poor
• Details are indistinct
• Image glares
One side of the image is unfocused
Conoscopic image cannot be seen
Total extinction cannot be obtained
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.
CAUSE
Power supply is unplugged.
Brightness is too low
Bertrand lens is in
You are in a position of extinction
Nosepiece is not correctly engaged.
Tint plate or Bertrand lens are in a in-
termediate position.
Dirt/dust on the eyepieces
Aperture iris diaphragm is stopped
down too far.
The condenser is not well centered or
it is in a wrong height
Nosepiece is in an incorrect position
Aperture iris diaphragm is too closed
or too open.
Dust or dirt on lenses (condenser,
objectives, eyepieces and slide)
For transmitted light observation, the
coverglass thickness must not exceed
0.17mm
Focus is not even
Nosepiece is in an incorrect position
Slide is mounted not in a flat position
(tilted)
Poor quality of the glass slide
Bertrand lens is not in the light path.
Analyzer is not in the light path
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.
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SOLUTION
Connect
Set brightness to a proper level
Remove Bertrand lens from light path
Disengage analyzer from the light path
Make sure that the nosepiece clicks
properly into place.
Move to a click stop
Clean the specimen
Clean the eyepieces
Open aperture iris diaphragm.
Set the condenser until a proper image
is achieved
Move the nosepiece to a click stop
Adjust aperture iris diaphragm.
Clean thoroughly.
Use a coverglass with thickness
0.17mm
Slide holder is not flat. Move the speci-
men to a flat position.
Move the nosepiece to a click stop
Place the specimen in a flat position on
the stage
Use a glass slide with higher quality
Insert the lens in the light path
Insert analyzer in the light path.
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
it helpful to look up and into distance
for a moment before looking back into
microscope.