KERN OBE-1 User Instructions page 25

Problem
Blurred details
Bad image
Bad contrast
Vignetted field of view
Dirt or dust in the field of view
One side of the image is blurred
The image flickers
The coarse adjustment knob is difficult to
turn
The stage moves down on its own
The fine adjustment knob moves on its
own
When you move the table, the image
becomes blurred
OBE-1-BA-e-1611
Possible causes
The aperture diaphragm is not opened wide
enough
The condenser is too low
The objective does not belong to this
microscope
The front lens of the objective is dirty
An immersion object has been used without
immersion oil
The immersion oil contains air bubbles
The condenser is not correctly centred
The recommended immersion oil has not
been used
Dirt / dust on the objective
Dirt /dust on the front lens of the condenser
Dirt / dust on the eyepieces
Dirt / dust on the front lens of the condenser
Dirt / dust on the object
The stage was not correctly fitted
The objective is not positioned correctly on
the beam path
The nosepiece is not correctly fitted
The upper side of the object is facing down
The nosepiece is not correctly fitted
The objective is not positioned correctly on
the beam path
The condenser has not been correctly
centred
The rotational resistance brake is too
tight
The angle table is blocked by a
solid body
The rotational resistance brake is not tight
enough
The stage was not correctly fitted
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