44
IX81
Problem
Cause
Remedy
Page
Magnification selector knob is in an in-
termediate position.
c) Field of view is obscured or not
evenly illuminated.
Turn the knob as far as it will go or
engage it at the click stop according
to the observation method.
14
Revolving nosepiece or magnification
selector knob is in an intermediate posi-
tion.
Fully engage the revolving nosepiece
or knob at a click stop.
14
Condenser turret is set in an intermedi-
ate position.
Engage the condenser turret at a click
stop.
–
A filter is stopped in an intermediate po-
sition.
Set the filter at the appropriate posi-
tion.
21
d) Dirt or dust is visible in the field of
view.
The frost filter is not engaged.
Engage the frost filter.
21
Dirt/dust on the specimen.
Clean thoroughly.
5
Dirt/dust on the eyepieces.
Dirt/dust on a mirror unit.
Dirt/dust on the optical element.
Condenser is not correctly positioned
and the frosted filter or filter is focused.
Adjust the condenser height until the
field iris diaphragm image is formed
in the specimen plane.
23
e) Image glares.
Condenser is raised too high.
Lower to the proper position.
23
Aperture iris diaphragm is stopped down
too far.
Open the aperture iris diaphragm.
25
f ) Visibility of observed image is poor.
· Image is not sharp.
· Contrast is poor.
· Details are poorly visible.
Objective in use is not designed for UIS2/
UIS series.
Replace with an objective designed
for UIS2/UIS optics.
47/48
Correction collar on the objective
equipped with correction collar is not
adjusted.
While focusing, rotate the correction
collar to find the best position.
27
Front lens of the objective is dirty.
Clean the objective.
5
Immersion oil is not being used with an
oil immersion objective.
Use immersion oil.
27
Immersion oil contains bubbles.
Remove bubbles.
27
Inappropriate slide or cover glass thick-
ness.
Replace with glass of appropriate
thickness.
–
Dirt/dust on glass components (con-
denser, objective, eyepieces, culture ves-
sels, etc.)
Clean thoroughly.
5
Ring slit and phase plate are not centered.
Center them correctly.
31
Poor contrast during DIC observation.
Replace the plastic culture vessel with
a glass vessel.
32/33
