Zuzi 146MET Manual Del Usuario página 20


Field diaphragm： it is used to reduce the reflected and stray light in the internal tube,
so as to enhance the image contrast. Firstly, adjust the center of field diaphragm into
the center of the eyepiece field by using the field diaphragm centering screw (30).
Then, to get the best contrast, use the field diaphragm adjusting rod (19) to make the
field diaphragm match the eyepiece field.
9. Focusing

When focusing, in order to prevent objective from touching the specimen, turn the
coarse focusing adjustment knob (11) to move the specimen away from the
objectives. Slowly turn the coarse focusing knob until a clear image is obtained, then
use the fine focusing adjustment knob (10) to enhance the observation of the
specimen to its clearest image. If magnification is increased, a little fine adjustment
will be necessary to obtain clear image under other higher magnification objective.

If moving mechanical stage is too hard or loose, turn the tension adjustment ring (12);
by turning it clockwise coarse focusing adjustment knob (11) will be tighten,
otherwise it will be loosen.

Turn the upper limit locking lever (25) after using the highest magnification objective.
This will avoid the mechanical stage (6) to rise above that position so as to prevent
the objective from touching the specimen and also allowing a quick and easy
focusing.
10. Filters：the microscope is provided with yellow, green and blue filters. Turn the filter dish
(31) to put into the light path the desired filter to obtain a required effect.
Operation with transmitted light
4. Make sure the illumination type choosing switch (14) is at the transmitted illumination
position. Adjust brightness with the corresponding knob (13).
5. Focusing：put the specimen in the center of the mechanical stage, and proceed as
previously described to focus the image.
6. Adjust the iris diaphragm (8):
Versión / Version 1; Ene 2017
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