Bresser NATIONAL GEOGRAPHIC 9039100 Instrucciones De Uso página 9

J LED lighting (transmitted light)
1) Electricity supply
1! Microscope base
1@ Main plug
1# 5 slides, 10 covering glasses and 5 preparations in a plastic box
1$ Colour filter disc
1% LED lighting (reflected light)
1^ Direct light/transmitted light switch
1& Microscope tools: a) pipette; b) tweezers
1* Hatchery
1( MicroCut
2) Specimens: a) yeast; b) gum media (specimen inclusion medium); c) sea salt; d)
brine shrimp eggs
2! Locking screw
1� General/Location
Make sure you position your microscope on a stable, solid surface. An electricity sup-
ply is required for observation with the electric illuminator.
Position your device so that it can be disconnected from the power supply at any time. The
wall you use socket should be located near the device and easily accessible, since the plug
on the power cord serves as a disconnecting device for the power supply. Always pull on
the plug to separate the device from the power supply. Never pull on the cord.
2� Electric LED lighting
Before use, make sure the light switch (16) is set to 'off'.
The microscope has two light sources. Lighting can be of three types. Set the switch
(16) to 'II' to light the specimen from above (reflected light) or 'I' to light it from below
(transmitted light). Use setting 'III' to light the specimen simultaneously by transmitted
and reflected light. The transmitted light unit (9) is used for transparent specimens
(those on glass slides). To view solid, non-transparent specimens, use the reflected
light unit (15). Use of both forms of lighting simultaneously is only recommended for
semitransparent specimens. This operating mode is not recommended for transmitted
light specimens on slides as it may cause reflection on the slide.
3. Colour filter disc
The colour filter (14) under the microscope table (7) aids in viewing very bright and
transparent objects. Just select the right colour for the specimen in question. The
components of colourless or transparent objects (e.g. starch particles, single-cell
specimens) can thus be better recognised.
4� Microscope setup
The microscope head (5) will now be prepared for your first observation. First, loosen
the screw (21) and rotate the head into a convenient position. Begin every observation
with the lowest magnification. Place the microscope's table (7) with the focus knob (8)
into the lowest position and rotate the objective revolver (6) until it locks on the lowest
magnification (4X).
NOTE:
Make sure to place the microscope's table (7) in its lowest
position before changing the objective in order to prevent
damage to the microscope.
Insert the 10X eyepiece (No. 1, 1) in the Barlow lens (No. 1, 3).
Take care that the Barlow lens is inserted completely into the monocular head (No. 1, 4).
5� Observation
After you have set up the microscope with the proper illumination, the following prin-
ciples are important:
Begin each observation at the lowest magnification, so that the centre and position
of the object to be viewed is in focus. The higher the magnification, the more light is
required for good picture quality.
EN
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