Bresser Junior Biotar Instrucciones De Uso página 11

Now, place a prepared slide (e.g. 11) under
the clips on the stage (4), directly under the
objective. When you take a look through the
eyepiece, you can see the magnified specimen.
At this point, it might still be a slightly fuzzy
picture. The sharpness is adjusted by slowly
turning the focus knob (2). You can now select
a higher magnification by turning the objective
turret and selecting a different objective.
In doing so, note that the sharpness of
the picture must be adjusted again for the
higher magnification. 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.
Electric Illumination
To use the electric light source (6), you need
two 1.5 V batteries, which are installed in
the base of the microscope (7). Remove the
rubber base (8) on the microscope and insert
the batteries according to the displayed +/- in-
formation. Reattach the rubber base to the mi-
croscope.
You can turn on the light by rotating it in the di-
rection of the stage (4). Take a look through the
eyepiece and adjust the light so that you get op-
timal picture brightness. Now you can observe
in the same way as described in point 1.3.
The bulbs for the electric light can be
replaced. One replacement bulb (14) 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 used,
the more light is required for a good
illumination of the picture. Therefore, always
start your experiments with one of the lower
magnifications.
Experiments
Use the following web link to find interesting
experiments you can try out.
http://www.bresser.de/downloads
Microscope accessories can be found here:
http://www.bresser.de/P8859480
Warranty & Service
The regular guarantee period is 5 years and be-
gins on the day of purchase. You can consult
the full guarantee terms and details of our ser-
vices at www.bresser.de/warranty_terms.
EN
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