User Guide

19
120
Series
T
roubleshooting
Common Issues
Symptom Cause Remedy
OPTICAL ISSUES
One side of the field
of view is darker
The nosepiece if misaligned Turn the nosepiece until it clicks into place
Stains or dust has accumulated on the condenser,
objective, eyepieces, or base lens
Clean all lenses with lens cleaner or a lint free non-
abrasive cloth
Obstructions are
observed in the field
of view
Stains, dust, or dirt has accumulated on the speci-
men
Clean the slide or use a new specimen if sample is
destroyed
Stains, dust, or dirt have accumulated on the lens Clean the lens
Unclear Image
There is no cover slip on the slide Add a cover slip. The objectives are designed for use
with a 0.17mm cover slip, so it is a requirement to
use one for proper images.
The cover slip is not standard sized Replace the cover slip with the appropriate 0.17mm
thickness slip
The immersion oil has accumulated on the dry
objective
Thoroughly clean the objective lens with lens clean-
er or a lint free nonabrasive cloth
No immersion oil is used with the 100x objective Use immersion oil for better clarity and resolution
Air bubble in the immersion oil Pop the air bubble
Used wrong oil Use standard cedarwood oil
The aperture is no open to an appropriate diam-
eter
Adjust the aperture to have the light just larger than
the size of the condenser
Stain or dust has accumulated on the lens in the
inlet of the head
Clean the lens with lens cleaner or a nonabrasive
lint free cloth, as well as spray with compressed air
The condenser is not in the right position Adjust condenser height to the top of the travel
range, then adjust down to focus image
One side of the field
of view is dark or the
image moves while
focusing
The specimen slide is not fixed Secure the slide to the stage with clips
The nosepiece is not in the right position Turn the nosepiece until it clicks into place
The field of view is not
bright enough
The iris diaphragm is not big enough Adjust the iris diaphragm to allow the light to be
just larger than the condenser
The condenser is not in the right position Adjust condenser height to the top of the travel
range, then adjust down to focus image
Stains, dust, or dirt has accumulated on the con-
denser, objective, eyepieces, or base lens
Thoroughly clean tall lenses with lens cleaner or a
lint free nonabrasive cloth