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6.0 Working with the stereo microscope
• Place an object onto the object plate and adjust the height of the holder randomly with the
screw (P) at the backside of the stand.
• Adjust the interpupillary distance by moving both prism housings (M) towards each other
until one round image is seen with both eyes.
• Focus the specimen by means of the focusing knobs (K) on both sides of the holder.
• For normal observation both tubes should have the same length, but to adjust any
difference between the two eyes, proceed as follows: focus sharply on a flat specimen, only
using the right eye, looking through the right eyepiece. Now look through the left eyepiece,
only with the left eye and focus the specimen with the diopter adjustment ring on the left
tube.
7.0 Maintenance and cleaning
Always place the dustcover over the microscope after use. Keep the eyepieces always mounted in
the tubes to avoid dust entering the instrument.
7.1 Cleaning the optics
When the eyepiece lens is dirty it can be cleaned by wiping a piece of lens paper over the surface
(circular movements). When this does not help put a drop of xylol or alcohol on the lens paper.
Never put xylol or alcohol directly on the lens!
When dirt is clearly visible in the field of view it resides on the lowest lens of the eyepiece. By
using the Allen-key the eyepiece can be removed from the tube. Clean the outside of the lens.
In case there is still dust visible please check if the dust is in the eyepiece by turning it. If this is the
case remove the lowest lens carefully from the eyepiece and clean it.
Caution
• Cleaning cloths containing plastic fibres can damage the coating of the lenses!
7.2 Maintenance of the stand
Dust can be removed with a brush. In case the stand or stage plate is really dirty the surface can
be cleaned with a non-aggressive cleaning product.
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