16
150 Series
Troubleshooting
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 objective,
eyepieces, or base lens
Clean all lenses with lens cleaner or a lint free non-
abraisive 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 aperture is not 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 nonabraisive
lint free cloth, as well as spray with compressed air
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 disc diaphragm is not big enough
Rotate the iris disc diaphragm to allow more light
to travel
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 nonabraisive cloth
