Zeiss Axioskop 2 plus Operating Manual page 125

Axioskop 2 plus
Axioskop 2 mot plus
Problem
Low resolving power and poor
image contrast.
Asymmetrically blurred images,
e.g. one side in focus, one side
not in focus.
B 40-075 e 10/03
CARE, MAINTENANCE, TROUBLESHOOTING AND SERVICE
Troubleshooting
Cause
Aperture diaphragm opening not
set correctly.
Condenser not focused correctly
and condenser lens 0.9 not
switched correctly.
Wrong cover slip thickness for
transmitted-light objectives with
cover slip thickness 0.17 mm.
Use of no or unspecified
immersion oil with immersion
objectives.
Air bubbles in the immersion oil.
Immersion oil at the front lens of a
dry objective.
Corr. ring is not set to the correct
cover slip thickness.
Dirt or dust on the optical surfaces
of objectives, eyepieces,
condensers or filters.
Condenser not set correctly.
Nosepiece not in click-stop
position.
Specimen is not clamped in
position on the mechanical stage.
Remedy
Set aperture diaphragm opening in
accordance with the 2/3 rule or
depending on the specimen
features, see p. 3-24 ff.
Focus condenser and switch
condenser lens 0.9 on or off
correctly, see p. 3-24 ff.
Use standardized cover slips with
thickness 0.17 mm.
Use immersion oil 518 N from Carl
Zeiss, see p. 4-8.
Apply new oil to remove the
bubbles.
Clean the front lens of the dry
objective, see p. 4-2.
Set the corr. ring to the correct
thickness, see p. 1-12.
Clean the appropriate optical
components, see p. 4-2.
Set condenser correctly,
see p. 3-24 ff.
Correctly click-stop nosepiece.
Correctly insert specimen in
specimen holder and clamp it.
Carl Zeiss
4-5