Operation - Zuzi 146MET Manual Del Usuario

5. OPERATION

Operation with reflected light
6. Make sure the illumination type choosing switch (14) is at the reflected illumination
position. Adjust brightness with the corresponding knob (13).
7. Adjust light source as follows:

Put the specimen on the mechanical stage (6) and place the 10× objective into the
light path.

Slowly turn the coarse focusing adjustment knob (11) until a clear image of the
specimen is obtained.

Remove one of the eyepieces from the observing tube and by looking through the
empty tube adjust the lamp focusing knob (21) until a clear image of the filament is
obtained.

Then, adjust the lamp vertical and horizontal adjustment knobs (22 and 23) to make
the image of the filament appear in the center of the field of view.

If the illumination is not uniform when observing the specimen, adjust again the
lamp focusing knob (21) with a little adjustment.
8. Adjust the aperture and field diaphragms:

Aperture diaphragm (it is centred from factory, so there is no need to centre this
diaphragm by user): the magnitude of the incident light beam can be changed when
adjusting the aperture diaphragm to get the highest resolution with each objective.
Whenever changing the objective and in order to get the best resolution, take off the
eyepiece to observe the size of the aperture diaphragm in the eyepiece tube. Use the
aperture diaphragm adjusting rod (18) to adjust this diaphragm until it is a little
smaller than the aperture of the objective.
Note：Aperture diaphragm is not for adjusting brightness; brightness must be regulated by
using the brightness adjustment knob (13).
Versión / Version 1; Ene 2017
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