Troubleshooting - Optika Italy B-383 Serie Bedienungsanleitung

15. 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 good;
• Contrast is poor;
• Details are indistinct;
• Image glares
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.
CAUSE
Power supply is unplugged.
Brightness is too low
Color filter or oblique illumination slider
are in a wrong position
Revolving nosepiece is not correctly
engaged.
Oblique illumination slider is in a wrong
position
Dirt/dust on the eyepieces
Aperture iris diaphragm is stopped
down too far.
The field diaphragm (both for reflected
light and transmitted light) is not well
centered.
Revolving nosepiece is in an incorrect
position
Aperture iris diaphragm is too closed
or too open.
Dust or dirt on lenses (condenser, ob-
jectives, eyepieces and slide)
For reflected light observation, the
specimen must not have any cover-
glass
Focus is not even
Revolving nosepiece is in an incorrect
position
Slide is mounted not in a flat position
(tilted)
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
Move to a click stop
Make sure that the revolving nose-
piece clicks properly into place.
Move the slider to a fully open position
Clean the specimen
Clean the eyepieces
Open aperture iris diaphragm.
Set the diaphragm according to Koe-
hler settings.
Move the nosepiece to a click stop
Adjust aperture iris diaphragm.
Clean thoroughly.
Use specimens without coverglass
Slide holder is not flat. Move the spec-
imen 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
it helpful to look up and into distance
for a moment before looking back into
microscope.