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SE300 Series

Common Issues (Optical)

Symptom

Obstructions are

Stains, dust, or dirt has accumulated on the speci-

men

observed in the field

of view

Stains, dust, or dirt have accumulated on the

lenses

Stain or dust has accumulated on the lens in the

Unclear Image

inlet of the head

The microscope head is not in the right position

to be focused

One side of the field

The specimen is not fixed

of view is dark or the

image moves while

focusing

The light source is not present

The field of view is not

bright enough

The light source is too dim

Stains, dust, or dirt has accumulated on the con-

denser, objective, eyepieces, or base lens

Cause

OPTICAL ISSUES

Troubleshooting

Solution

Clean the slide or use a new specimen if sample is

destroyed

Clean the objective and eyepiece lenses

Clean the lens with lens cleaner or a nonabrasive

lint free cloth, as well as spray with compressed air

Adjust the height of the microscope with the focus-

ing knob on the focusing rack until image appears

in focus. Note: Higher magnification will require

the head to move closer, while lower will require

more distance between the sample and the lens.

Secure the slide to the stage with clips or another

manner so that the sample does not move

A light source must be used with this model micro-

scope to view a sample (ring light, built in illumina-

tor, or gooseneck illuminator)

The light source used is not bright enough, or is set

to too low of an intensity setting. Adjust setting to a

higher or change light sources

Thoroughly clean tall lenses with lens cleaner or

a lint free nonabrasive cloth