BRESSER 8851310 Junior Microscope Instruction Manual
- June 12, 2024
- BRESSER
Table of Contents
8851310 Junior Microscope
Instruction Manual
Mikroskop
Microscope
Art. No. 8851310
Operating Instructions
8851310 Junior Microscope
MANUAL DOWNLOAD:
www.bresser.de/P8851310
SERVICE AND WARRANTY:
www.bresser.de/warranty_terms
MICROSCOPE GUIDE:
www.bresser.de/guide
MICROSCOPE FAQ:
www.bresser.de/faq
EXPERIMENTS:
www.bresser.de/downloads
WARNINGS! Not suitable for children under three years. CHOKING HARZARD –
small parts. PUNCTURING HAZARD – functional sharp points! LACERATING HAZARD –
functional sharp edges! Keep instructions and packaging as they contain
important information. 
General Warnings
- Choking hazard — This product contains small parts that could be swallowed by children. This poses a choking hazard.
- Risk of electric shock — This device contains electronic components that operate via a power source (batteries). Only use the device as described in the manual, otherwise you run the risk of an electric shock.
- Risk of fire/explosion — Do not expose the device to high temperatures. Use only the recommended batteries. Do not short-circuit the device or batteries, or throw them into a fire. Excessive heat or improper handling could trigger a short-circuit, a fire or an explosion.
- Risk of chemical burn — Make sure you insert the batteries correctly. Empty or damaged batteries could cause burns if they come into contact with the skin. If necessary, wear adequate gloves for protection.
- Leaking battery acid can lead to chemical burns. Avoid contact of battery acid with skin, eyes and mucous membranes. In the event of contact, rinse the affected region immediately with a plenty of water and seek medical attention.
- Use only the recommended batteries. Always replace weak or empty batteries with a new, complete set of batteries at full capacity. Do not use batteries from different brands, types or with different capacities. Remove the batteries from the unit if it is not to be used for a long period of time, or if the batteries are empty!
- Never recharge normal, non-rechargeable batteries. This could lead to explosion during the charging process.
- Rechargeable batteries are only to be charged under adult supervision.
- Rechargeable batteries are to be removed from the toy before being charged
- The terminals must not be short-circuited.
- Do not disassemble the device. In the event of a defect, please contact your dealer. The dealer will contact the Service Centre and can send the device in to be repaired, if necessary.
- Tools with sharp edges are often used when working with this device. Because there is a risk of injury from such tools, store this device and all tools and accessories in a location that is out of the reach of children.
- Keep instructions and packaging as they contain important information.
Parts overview
1. Zoom Eyepiece
2. Focus knob
3. Objective turret
4. Stage
5. On/off switch ( illumination)
6. Electronic light source
7. Base with battery compartment
8. Battery compartment (3x AA)
9. Cover plates
10. Blank slides
11. Specimens:
a) Yeast| b) “Gum Media” Glue
c) Sea Salt
d) Brine Shrimp Eggs (Artemia)
e) Empty Bottle
12. Microscope instruments
13. Wheel with pinhole apertures / Filter wheel
14 Measuring cup
15. Magnifier box
16. MicroCut
17. Petri dish
18. Eyecup
---|---
What is a microscope?
A microscope contains two lens systems: the eyepiece and the objective.
We’re presenting these systems as one lens each so that the concept is easier
to understand. In reality, however, the eyepiece (1) and the objective in the
turret (3) are made up of multiple lenses.
The lower lens (objective) produces a magnified image of the prepared
specimen. 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’.
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 microscope on a stable surface, because a shaky surface will not lead to satisfactory results.
Normal observation
For normal observation, place the microscope in a bright location (near a
window or desk lamp, for example).
Turn the focus knob (2) to the upper stop, and set the objective turret (3)
to the lowest magnification.
Now, turn on the light using the switch on the microscope base. You’ll find
further tips about the light source in the next section. Now, place a prepared
slide under the clips on the stage (4), directly under the objective (1). 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 ocus knob (2). You can now select a higher
magnification by turning the objective turret and selecting a different
objective.
When you do 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. The wheel with
pinhole apertures (13) below the microscope stage (4) will help you in viewing
very bright or clear-sighted preparations. Turn the wheel (13) till the best
contrast is achieved.
Observation (electronic light source)
For observation with the electronic light source (6) you need to insert 3 AA
batteries 1.5 V, in the battery compartment (8) on the base of the microscope
(7). The battery compartment is opened using a Phillips screwdriver. Insert
the batteries with the correct polarity (+/- indication).
Put the battery cover first into the small opening so that the lid fits
perfectly. Now you can tighten the screw.
The lighting is switched on when you turn the switch on the microscope base.
Now you can observe in the same way as described in the previous section.
TIP: The higher the magnification you use the more light is required for a
good illumination of the picture. Therefore, always start your experi- ments
with a low magnification.
Condition and prepare viewed objects
5.1. Condition
This microscope features transmitted light, so that transparent specimens can
be examined.
If opaque specimens are being examined, the light from below goes through the
specimen, lens and eyepiece to the eye and is magnified enroute (direct light
principle).
Some small water organisms, plant parts and animal components are transparent
by nature, but many others require pretreatment — that is, you need to make a
thinnest possible slice of the object by hand cutting or using a microtome,
and then examine this sample.
5.2. Creation of thin preparation cuts
Specimens should be sliced as thin as possible. A little wax or paraffin is
needed to achieve the best results. Put the wax into a heat-safe bowl and heat
it over a flame until the wax is melted. You can use a candle flame to melt
the wax.
DANGER!
Be exremely carfeful when dealing with hot wax, as there is a danger of being
burned.
Then, dip the specimen several times in the liquid wax. Allow the wax that
encases the specimen to harden. Use a MicroCut or other small knife or scalpel
to make very thin slices of the object in its wax casing.
DANGER!
Be extremely careful when using the MicroCut, knife or scalpel. These
instruments are very sharp and pose a risk of injury.
Place the slices on a glass slide and cover them with another slide before
attempting to view them with the microscope.
5.3. Creation of your own preparation
Put the object to be observed on a glass slide and cover the object with a
drop of distilled water using the pipette (12).
Set a cover glass (available at a well-stocked hobby shop) perpendicular to
the edge of the water drop, so that the water runs along the edge of the cover
glass. Now lower now the cover glass slowly over the water drop.
Experiments
Use the following web link to find interesting experiments you can try out.
How do you hatch brine shrimp? How to make salt crystals and much more.
http://www.bresser.de/downloads
Microscope accessories can be found here:
http://www.bresser.de/P8859480
Notes on Cleaning
- Before cleaning the device, disconnect it from the power supply by removing the batteries.
- Only use a dry cloth to clean the exterior of the device. To avoid damaging the electronics, do not use any cleaning fluid.
- Protect the device from dust and moisture.
- The batteries should be removed from the unit if it has not been used for a long time.
EC Declaration of Conformity
** Bresser GmbH has issued a „Declaration of Conformity“ in accordance with
applicable guidelines and corresponding standards. The full text of the EC
declaration of conformity is available at the following internet address:
www.bresser.de/download/8851310/CE/8851310_CE.pdf
UKCA Declaration of Conformity
** Bresser GmbH has issued a „Declaration of Conformity“ in accordance with
applicable guidelines and corresponding standards. The full text of the UKCA
declaration of conformity is available at the following internet address:
www.bresser.de/download/8851310/UKCA/8851310_UKCA.pdf
Bresser UK Ltd.
Suite 3G, Eden House, Enterprise Way, Edenbridge, Kent TN8 6HF, Great Britain
Warranty
The regular warranty period is 2 years and begins on the day of purchase. To
benefit from an extended voluntary warranty period as stated on the gift box,
registration on our website is required.
You can consult the full warranty terms as well as information on extending
the warranty period and details of our services at
www.bresser.de/warranty_terms.
Contact
Bresser GmbH
Gutenbergstraße 2
46414 Rhede · Germany
www.bresser.de
@BresserEurope
Bresser UK Ltd.
Suite 3G, Eden House
Enterprise Way, Edenbridge,
Kent TN8 6HF, Great Britain
Errors and technical changes reserved.
Manual_8851310_Microscope
BRESSER-JR_v022023a
References
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