BRESSER 9119501 National Geographic Mikroskop Microscope 40X-64X Instruction Manual
- June 6, 2024
- BRESSER
Table of Contents
NATIONAL
GEORAPHIC
MIKROSKOP
MICROSCOPE 40X-640X
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MANUAL DOWNLOAD:
Operating instructions
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 (power supply and/or 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.
- 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.
Parts overview
- Eyepiece
- Focus knob
- Objective turret
- Stage
- On/off switch ( illumination)
- Electronic light source
- Base with battery compartment
- Battery compartment
- Cover plates and adhesive labels
- Prepared slides and blank slides
- Specimen Vials
- Empty Vials
- Magnifying Glass
- Pipette
- Tweezers
- Aperture wheel
- Measuring cup
- Hatchery
- MicroCut
- Smartphone holder
- 2x AA Batteries
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
(10). The picture, which you can’t see, is magnified once more by the second
lens (eyepiece, 1), which you can see as the ‘micro- scope 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 (10) 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 focus 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 (16) below the microscope stage (4) will help
you in viewing very bright or clear-sighted preparations. Turn the wheel (16)
till the best contrast is achieved.
Observation (electronic light source)
For observation with the electronic light source (6) you need to insert 2 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
good illumination of the picture.
Therefore, always start your experiments with a low magnification.
5. Smartphone holder
Open the flexible holder and put your smartphone in it. Close the holder and make sure your phone is properly secured. The camera must be positioned exactly above the eyepiece. Open the locking clip on the back of the holder and fit the eyepiece exactly onto your smartphone camera. Now retighten the locking clip and attach the smartphone adaptor to the eyepiece of your microscope. Now start the camera app. If the image is not yet centered on your display, loosen the locking clip slightly and readjust. It may be necessary to use the zoom function to fill the image on the display. A slight shading at the edges is possible. Remove the smartphone from the holder after use!
WARNING:
Make sure that the smartphone can not slip out of the holder. Bresser GmbH
assumes no liability for any damages caused by a dropped smartphone.
Condition and prepare viewed objects
6.1.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 en route
(direct light principle).
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.
6.2. 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 extremely careful 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.
6.3. 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 (14).
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.
7. Experiments
Now that you’re familiar with your microscope’s functions and how to prepare
slides, you can complete the following experiments and observe the results
under your microscope.
7.1. How do You Raise Brine Shrimp?
Accessories (from your microscope set):
- Shrimp eggs
- Sea salt,
- Hatchery,
- Yeast.
The Life Cycle of Brine Shrimp
Brine shrimp, or “Artemia salina,” as they are called by scientists, have an
unusual and interesting life cycle. The eggs produced by the female are
hatched without ever being fertilized by a male shrimp. The shrimp that hatch
from these eggs are all females. In unusual circumstances, e.g. when the marsh
dries up, the male shrimp can hatch. These males fertilize the eggs of the
females and from this mating, special eggs come about. These eggs, so-called
“winter eggs,” have a thick shell, which protects them. The winter eggs are
very resistant and capable of survival if the marsh or lake dries out, killing
off the entire shrimp population. They can persist for 5-10 years in a “sleep”
status. The eggs hatch when the proper environmental conditions are
reproduced. These are the type of eggs you have in your microscope set. The
Incubation of the Brine Shrimp
In order to incubate the shrimp,
you first need to create a salt solution that corresponds to the living
conditions of the shrimp. For this, put a half-liter of rain or tap water in a
container. Let the water sit for approx. 30 hours. Since the water evaporates
over time, it is advisable to fill a second container with water and let it
sit for 36 hours. After the water has sat stagnant for this period of time,
add half of the included sea salt to the container and stir it until all of
the salt is dissolved. Now, put a few eggs in the container and cover it with
a dish. Place the
glass container in a bright location, but don’t put it in direct sunlight.
Since you have a hatchery, you cal also add the salt solution along with a few
eggs to each of the four compartments of the tank. The temperature should be
around 25º. At this temperature, the shrimps will hatch in about 2-3 days. If
the water in the glass evaporates, add some water from the second container.
The Brine Shrimp under the Microscope
The animal that hatches from the egg is known by the name “nauplius larva.”
With the help of a pipette, you can place a few of these larvae on a glass
slide and observe them. The larvae will move around in the saltwater by using
their hair-like appendages. Take a few larvae from the container each day and
observe them under the microscope. In case you’ve hatched the larvae in a
hatchery, simply take off the cover of the tank and place the tank on the
stage. Depending on the room temperature, the larvae will be mature in 6-10
weeks. Soon, you will have had raised a whole generation of brine shrimp,
which will constantly grow in numbers.
Feeding your Brine Shrimp
In order to keep the brine shrimp alive, they must be fed from time to time,
of course. This must be done carefully, since overfeeding can make the water
become foul and poison our shrimp population. The feeding is done with dry
yeast in powdered form. A little bit of this yeast every second day is enough.
If the water in the compartments of the hatchery or your container turns dark,
that is a sign that it is gone bad. Take the shrimp out of the water right
away and place them in a fresh salt solution.
Warning!
The shrimp eggs and the shrimp are not meant to be eaten!
7.2. Textile fibres
Objects and accessories:
1. Threads of different textiles: Cotton, linen, wool, silk, Celanese, nylon
and any others you can find.
2. Two needles:
Put each thread on a glass slide and fray each with the help of the two
needles. Put a drop of water over each thread with the pipette and cover each
with a cover glass. Adjust the microscope to low magnification. Cotton fibres
are of plant origin and look, under the microscope, like a flat, twisted band.
The fibres are thicker and rounder at the edges than in the centre. Cotton
fibres consist primarily of long, collapsed tubes. Linen fibres are also of
plant origin; they are round and run in straight lines. The fibres shine like
silk and exhibit numerous swellings along the shaft of the fibre. Silk is of
animal origin and consists of solid fibres of smaller diameter than the hollow
vegetable fibres. Each silk fibre is smooth and even and has the appearance of
a small glass rod. Wool fibres are also of animal origin; the surface consists
of overlapping scales, which appear broken and wavy. If possible, compare wool
fibres from different weaving mills, and note the differences in the
appearance of the fibres. Experts can determine the country of origin of wool
based on its appearance under a microscope. Celanese is artificially
manufactured by a long chemical process. All Celanese fibres show hard, dark
lines on a smooth, shining surface. The fibres crinkle in the same way after
drying. Observe the similarities and differences between the different fibres.
Notes on Cleaning
- Before cleaning the device, disconnect it from the power supply by removing the plug or 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 EU
declaration of conformity is available at the following internet address:
www.bresser.de/download/9119501/CE/9119501_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/9119501/UKCA/9119501_UKCA.pdf Bresser UK Ltd. • Suite
3G, Eden House, Enterprise Way, Edenbridge, Kent TN8 6Hf, Great Britain
Disposal
Dispose of the packaging materials properly, according to their types, such as
paper or cardboard. Contact your local waste disposal service or environmental
authority for information on the proper disposal.
Do not dispose of electronic devices in the household garbage! As per
Directive 2002/96/EC of the European Parliament on waste electrical and
electronic equipment and its adaptation into German law, used electronic
devices must be collected separately and recycled in an environmentally
friendly manner.
Empty, old batteries must be disposed of at battery collection points by the
consumer. You can find out more information about the disposal of devices or
batteries produced after 6 January 2006 from your local waste disposal service
or environmental authority.
In accordance with the regulations concerning batteries and rechargeable batteries, disposing of them in normal household waste is explicitly forbidden. Please make sure to dispose of your used batteries as required by law — at a local collection point or in the retail market. Disposal in domestic waste violates the Battery Directive.
Batteries that contain toxins are marked with a sign and a chemical symbol.
- battery contains cadmium
- battery contains mercury
- Cd¹ Hg² Pb³ battery contains lead
Warranty and Service
The regular guarantee period is 5 years and begins on the day of purchase. You
can consult the full guarantee terms and details of our
services at
www.bresser.de/warranty_terms.
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Bresser UK Ltd.
Suite 3G, Eden House
Enterprise Way, Edenbridge,
Kent TN8 6Hf, Great Britain
Manual_9119501_Mikroskop-40x-640x_de-en-fr-es_NGKIDS_v072021a Errors and
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