Bresser National Geographic 9118100 Instrucciones De Uso página 9

The lower lens (objective) produces a magnified image of the prepared specimen placed on the stage (4).
The picture, which you can't see, is magnified once more by the second lens (eyepiece, 1), which you can
see as the 'microscope picture'.
2. Assembly and location
Before you start, choose an ideal location for using your microscope. It's important that you choose a
spot with enough light for normal observation. Furthermore, it is recommended that you place the micro-
scope on a stable surface, because a shaky surface will not lead to satisfactory results.
3. Normal observation
For normal observation, place the microscope in a bright location (near a window or desk lamp, for exam-
ple). Remove the microscope from the package and tilt the microscope arm (9) so that it's in a comfort-
able viewing position for you.
Turn the focus knob (2) to the upper stop, and set the objective turret (3) to the lowest magnification.
Now, take a look through the eyepiece and adjust the mirror (5) so that you see a uniform, bright circle of
light. Or, you can use the electronic light source (6). You'll find further tips about the light source in the
next section. Now, place a prepared slide (11) under the clips on the stage (4), directly under the objec-
tive. When you take a look through the eyepiece, you can see the magnified specimen. At this point, you
still might see a slightly fuzzy picture. Adjust the image sharpness by slowly turning the focus knob (2)
until the picture appears sharp and clear. You can now select a higher magnification by turning the objec-
tive turret and selecting a different objective.
When you do so, note that the sharpness of the picture must be adjusted again for the higher magnifica-
tion. Also, the higher the magnification, the more light you will need for good illumination of the picture.
TIP: Avoid positioning the mirror so that it is exposed to direct sunlight, since it can cause a glare, which
won't allow you to get a clear picture.
4. Observation (electronic light source)
To use the electronic light source (6), you need to install two 1.5-volt batteries in the base
of the microscope (7). Remove the rubber base (8) on the microscope with a screwdriver
and insert the batteries according to the displayed +/- information. Reattach the rubber
base to the microscope using the screwdriver.
You can turn on the light by rotating it in the direction of the stage (4). Take a look through the eyepiece
and adjust the light so that you get optimal picture brightness. Now you can observe in the same way as
described in the previous section.
The bulbs for the electronic light can be replaced. One replacement bulb (16) is included. When you use
another bulb, make sure to pay attention to the maximum wattage, which is displayed on the lamp body.
TIP: The higher the magnification you use, the more light is required for a good illumination of the picture.
Therefore, always start your experiments with a low magnification.
EN
9