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Microscopy
Semi Plan MEDIO Trinocular microscope
Ref :
571 228
ENGLISH
3 Use and adjustment
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When moving the microscope, pick it up only by the inclined arm of the
body and place your other hand under the base.
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Use the switch to turn the microscope on, turn the dimmer located on
the base to obtain the desired light intensity.
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Place the specimen on the stage.
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The 360 º rotatable head and the tube inclined at a 45 º angle are
ergonomically designed for prolonged use.
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The parafocal objectives make it easy to focus when changing the
magnification; the 40 x and 100 x (immersion) objectives are retractably
mounted to avoid damaging the specimen in case of accidental contact with
the specimen.
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The microscope is focused by vertically displacing the stage by a
knurled coarse adjustment knob for rapid movements and a coaxial
micrometric screw for fine adjustments.
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The height to which the stage can be raised can be limited by the
blocking lever located at the base of the coarse adjustment and on the left of
the body. In order to adjust this stop:
- switch to the 100 x objective, then slowly raise the stage while observing it
from the side until the plate almost touches (about 0.2 mm) the objective,
- lower the lever.
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Under the stage there is a light condenser that is adjustable by the
knurled knob on the left, as well as a diaphragm with an adjustable iris and a
filter holder for inserting filters (blue or green) to observe highly transparent
specimens.
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Adjust the illumination by finding the best position for the condenser,
then close the diaphragm to increase the contrast and the field depth. Do not
close the diaphragm too much, as doing so will change the resolution.
4 Maintenance
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Protection from dust: After use, place the cover over the apparatus. If
there are dust deposits on the lenses, blow them away with the help of a
syringe or dust remover (item no. 574 198) or use a martin hair brush; the
lenses are fragile and can be scratched by dust.
-
Fingerprints: Do not touch the lenses. If, however, they do have
fingerprints on them, remove the fingerprints with a soft cloth or lens paper
(item no. 803 092).
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Humidity: Humidity, especially in combination with temperature, is
particularly harmful to the assembled optics. It is a good idea to store the
microscopes in a dry place, and under especially exposed climate conditions,
the microscopes should be stored in their polystyrene boxes with a desiccation
bag.
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Disassembly: A microscope is a finely-tooled, precision instrument. If it
is necessary to take it apart (for maintenance), the instrument should be
returned to JEULIN or a qualified repair shop. The base plate that seals the
microscope may only be opened by an electrician because the body must
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