Zeiss Axio Examiner, Operating Manual, Page: 84 / 96

CARE, MAINTENANCE, TROUBLESHOOTING AND SERVICE
Carl Zeiss Trouble shooting Axio Examiner
84 M60-2-0003 e 05/2012
5.3 Trouble shooting
Problem Cause Correction
Shading or irregular image
brightness in the microscopic
visual field;
visual field not visible completely.
The vis/fot push rod at the phototube
is not switched on in the correct
functional position (intermediate
position).
Switch the vis/fot push rod at the
phototube to the correct functional
position (final position), see page 69.
Objective not lowered to the working
position at the objective mount or
objective nosepiece.
Lower the objective to the working
position at the objective mount or
objective nosepiece.
Condenser not set correctly. Set the condenser correctly
(adjustment, centering),
see page 58 and the following.
Aperture stop not set correctly. Set the aperture stop correctly
(centering, opening),
see page 58 and the following.
Luminous-field diaphragm not set
correctly. Set the luminous-field diaphragm
correctly (centering, opening),
see page 58 and the following.
Filter not placed correctly into the
filter holder. Place filter correctly into the filter
holder.
Low resolution and bad image
contrast.
Aperture stop opening not set
correctly.
Adjust the aperture stop opening
according to the 2/3 rule or as per
specimen condition,
see page 58 and the following.
Condenser not focused correctly. Focus the condenser,
see page 58 and the following.
Wrong cover slip thickness used for
transmitted light objectives with a
cover slip thickness of 0.17 mm.
Use standardized cover slips with a
thickness of 0.17 mm.
Use of no or of unspecified immersion
oil with immersion objectives.
Use Immersol 518 N
®
or 518 F
®
from Carl Zeiss.
Air bubbles in the immersion oil. Remove the air bubbles by applying
new oil.
Immersion oil at the front lens of a dry
objective.
Clean the front lens of the dry
objective, see page 82.
Correction setting ring not set to the
right cover slip thickness. Adjust the correction setting ring to
the correct cover slip thickness.
Dirt or dust on the optical surfaces of
objectives, eyepieces, condensers or
filters. Clean the corresponding optical
components, see page. 82.