Bresser National Geographic 9619742 User manual

AFTER SALES SUPPORT
YEAR WARRANTY
3
MODEL: 9619742 PRODUCT CODE: 707758 11/2021
www.bresser.de
00800 6343 7000
GB
00800 6343 7000
IRE
Model Number: 9619742
Product Code: 707758
x2
INCLUDED
A
AA A
Operating instructions
ZOOM MICROSCOPE
40X-640X

2
40X - 640X Microscope Set
Contents:
• Microscope
• 10X-16X Wideeld Zoom Eyepiece
• 1 Prepared Slide
• 2 Blank Slide
• 8 Slide Plates
• 3 Specimen Vials
• Graduated Cylinder
• Pipette
• Tweezers
• Magnifying Glass
• Round Cutter
• Hatchery
• Smartphone Adaptor
WARNINGS!
Not suitable for children under three
years. Choking harzard - small parts.
RISK OF INJURY - functional sharp points
or sharp edges. Keep instructions and
packaging as they contain important
information.
Supervision by Adults
Read and follow the instructions,
safety rules and rst aid informa-
tion.
This Microscope set is intended
for children over the age of 6 years.
Children should only use this
device under adult supervision.
Never leave a child unsupervised
with this device.
Accessories in this experimental
kit may have sharp edges and tips.
Please store the device and all of
its accessories and aids out of the
reach of young children when not
being used due to a risk of INJURY.
This device contains electronic
components that are powered
by batteries. Never leave a child
unsupervised with this device.
Batteries should be kept out of
children’s reach. When inserting
batteries please ensure the polarity
is correct. Insert the batteries
according to the displayed +/-
information.
Fire/Danger of Explosion
Do not expose the device to high
temperatures. Use only battery
types recommended. Never mix
old and new batteries (replace all
batteries at the same time). Never
mix Alkaline, standard (Carbon
Zinc) or rechargable batteries.
Never short circuit the device
or batteries or throw into a re.
Exposure to high temperatures
or misuse of the device can lead
to short circuits, re or even
explosion. Leaking or damaged
batteries can cause injury if they
come into contact with the skin. If
you need to handle such batteries
please wear suitable safety gloves.
Chemicals
Any chemicals and liquids used in
preparing, using, or cleaning should
be kept out of reach of children. Do
not drink any chemicals. Hands
should be washed thoroughly
under running water after use.
In case of accidental contact
with the eyes or mouth rinse with
water. Seek medical treatment
for ailments arising from contact
with the chemical substances and
take the chemicals with you to the
doctor.
Risk of Material Damage
Never take the device apart.
Please consult our service center
and send the device in for repair if
needed. Do not subject the device to
temperatures exceeding 140˚F.
Tips on Cleaning
Remove batteries from device
before cleaning.
Microscope Care
Clean the exterior of device with a
dry cloth. Do not use cleaning uids
so as to avoid causing damage to
electronic components. Clean the
lens (objective and eyepiece) only
with a soft lint-free cloth (e.g.,
microber). Do not use excessive
pressure - this may scratch the
lens. Protect the device from dust
and moisture. Store the device in
its original packaging. Batteries
should be removed from the
device if not used for a long period
of time.
Disposal
Keep packaging materials (plastic
bags, rubber bands, etc.) away
from children. There is a risk of
SUFFOCATION.
Dispose of packaging materials
as legally required. Consult the
local authority on the matter if
necessary.
Warning- The lens contains lead that may be
harmful. Wash hands after touching.
Manual Download
www.bresser.de/download/9619742

3
The Parts of Your Microscope:
1) Zoom eyepiece
2) Focus knob
3) Stage
4) Metal stage clips
5) Aperture wheel
6) 4X, 10X, 40X objectives
7) Objective turret
8) LED illumination
9) Base with battery compartment
10) ON/OFF switch
11) Microscope arm
Additional Contents:
12) 8 Blank Slides
13) 3 Prepared Slides
14) 8 Cover glasses and
8 adhesive labels
15) 3 Specimen Vials
16) 3 Empty Vials
17) Graduated Cylinder
18) Pipette
19) Tweezers
20) Magnifying Glass
21) Round Cutter (MicroCut)
22) Hatchery
23) Smartphone Adaptor
Congratulations! You’ve chosen one
of the highest quality microscopes
available for young explorers. Read
the following instructions carefully
to get the greatest benet from
your precision instrument. Then try
out the experiments to begin your
investigation of the fascinating
world around you.
How Do I Use My Microscope?
Before you use your microscope,
make sure that the table, desk or
whatever surface that you want
to place it on is stable, and is
not subject to vibration. If the
microscope does need to be
moved handle the microscope by
the arm and base while carefully
transferring it.
Install two “AA” batteries (included)
in the battery box, located in the
base of the microscope. Open
battery door using a Phillips
screwdriver and insert the batteries
according to the displayed +/-
information. Snap-close the battery
compartment door and tighten the
screw.
Once the microscope is in a
suitable location and batteries
installed, check the light source to
make sure that it illuminates. Use
a cleaning cloth (e.g., microber)
to gently wipe the lenses off. If
the stage is dirty with dust or
oil, carefully clean it off. Make
sure that the stage is raised and
lowered only by using the focus
adjustment knob.
How Do I Operate the LED
Illumination?
Locate the ON/OFF switch on
the base of the microscope. Flip
the switch to the on position and
the light will illuminate. This
microscope is equipped with
modern LED lighting (a light-
emitting diode) that illuminates
the specimen from below. The
aperture wheel is located in the
middle of the microscope stage.
They help you when you are
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4
40X - 640X Microscope Set
observing very bright or clear
specimens. Using these lters,
you can choose from various
brightness levels. This helps you
better recognize the components
of colorless or transparent objects
(e.g., grains of starch, protozoa).
How Do I Adjust My Microscope
Correctly?
Place in a suitable location as
described previously and sit in
a comfortable viewing position.
Each observation starts with the
lowest magnication. Adjust the
microscope stage so that the
stage is at the lowest position.
Then turn the objective turret
until it clicks into place at the
lowest magnication (objective
4X). Note: Before you change the
objective setting, always move the
microscope stage to its lowest
position. This way, you can avoid
causing any damage to the slide
or microscope. Make sure the
zoom eyepiece is also in the fully
lowered position.
Note: The highest magnication
is not always the best for every
specimen.
How do I observe the
specimen?
Sitting in your location with
adequate illumination chosen
from the aperture lter wheel,
the following basic rules are
to be observed: Start with a
simple observation at the lowest
magnication. This way, it is easier
to position the object in the middle
(centering) and make the image
sharp (focusing). The higher the
magnication, the more light you
will require for good image quality.
Quick Fact - The item you want
to observe with the microscope is
known as the object or specimen.
Now place the prepared slide
directly under the objective on the
microscope stage securing with the
stage clips. The object/specimen
should be located directly over
the illumination. At this point,
take a look through the eyepiece
and carefully turn the focus knob
until the image appears clear and
sharp. Now you can select a higher
magnication by slowly turning the
zoom eyepiece. When the zoom
lens is completely turned out, the
magnication is increased by 62%.
If you would like an even higher
level of magnication, turn the
objective turret to a higher setting
(10X or 40X). Please note: You
should return the zoom to lowest
power of magnication.
Note: You should always lower
the stage and return the zoom to
lowest power when rotating the
objective turret.
Each time the magnication
changes (eyepiece or objective
change), the image sharpness must
be readjusted with the focus knob.
When doing this, make sure to be
careful; if you move the microscope
stage too quickly, the objective and
the slide could come into contact
and cause damage to the slide or
the microscope.
For transparent objects (e.g.,
protozoa), the light shines from
below, through the opening in
the microscope stage and then
through the object. The light travels
further through the objective
and eyepiece, where it is also
magnied, and nally goes into
the eye. This is transmitted light
microscopy. Many microorganisms
in water, many plant components
and the smallest animal parts
are already transparent in nature.
Opaque specimens, on the other
hand, will need to be prepared for
viewing. Opaque specimens can
be made transparent by a process
of treatment and penetration with
the correct materials (media),
or by slicing. You can read more
about creating specimens in the
following sections.
No recognizable image
No Image
No Light
Turn on light
Readjust focus
Start with the lowest power
objective (4X) & lowest power
eyepiece (10X)
Center object on slide
Start with the lowest power
objective (4X) & lowest power
eyepiece (10X)
Replace batteries
Check ON/OFF position
Troubleshooting Table
Problem Solution
Cleaning Tips
To ensure your microscope has
a long service life, clean the lens
(objective and eyepiece) only with
soft lint free cloth (e.g., microber).
Do not press hard as this might
scratch the lens. Ask your parents
to help if your microscope is really
dirty. The cleaning cloth should be
moistened with cleaning uid and
the lens wiped clean using very
little pressure. Make sure your
microscope is always protected
against dust and dirt. After use,
leave it in a warm room to dry off.
This microscope can be the
gateway to a fun, creative, learning
process and will open the door
to advanced knowledge of the
world around you. It allows you
to explore the various elds of
science from biology to botany
to chemistry and beyond, so have
fun exploring the exciting world of
science.

5
40X - 640X Microscope Set
How do I use the Smartphone
adaptor?
Open the exible 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
t 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 ll 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
UK Ltd. assumes no liability for
any damages caused by a dropped
smartphone.
Experiment Instructions
WARNING
• Keep chemicals and corrosive
liquids out of the reach of
children.
• Do not ingest any chemicals.
• Wash your hands thoroughly
with soap under running water
after use.
Introduction
Here are a few tips about how to take
a better look at the wonderful world
of microorganisms and crystals.
For example, you will learn how to
prepare your object, so that you can
look at it with the microscope. The
numerous experiments described
should make you curious and want to
use your microscope more.
What Kind of Objects?
With a magnifying glass, you can
look at non-transparent (i.e, opaque)
objects—for example, small animals,
parts of plants, tissues, etc. Here,
the light falls onto the object
and is reected back through the
magnifying lens and into your eye.
With your microscope, however, you
can observe transparent objects, in
which the light from the lamp goes
through the opening on the stage
and your prepared specimen. Then
it passes through the objective, the
body of the microscope and the
eyepiece into your eye. In this way,
the microscope is only meant for
observing transparent objects. Many
aquatic microorganisms, plant parts,
and small animal parts are naturally
transparent. Other things can be
made transparent. Transparency can
be achieved through a treatment
or penetration with the appropriate
materials (media), or by taking the
thinnest slices from them (using a
hand or specimen slicer), and then
examine them. You’ll now nd out
how this is done.
How to Produce Thin Specimen
Slices
WARNING
Only do this with an adult’s
supervision. Ask your parents to
help you. As already mentioned,
you need to get the thinnest slices
possible from an object so that they
are transparent and can be looked at
under the microscope. First, you’ll
need a simple candle. Place the
wax from the candle in an old pot
and heat it on the stovetop until it
becomes liquid. Now, use tweezers
to dip the object in the liquid wax a
few times. The wax is very hot. Be
careful. After each dip, allow the wax
to harden and then dip the object into
the wax again. When the wax around
the object has hardened completely,
you can use the specimen slicer to
cut thin slices from it. These slices
are to be laid on a slide and covered
with a cover slip.
The Production of Specimens
There are two basic types of speci-
mens: Permanent specimens and
short-term specimens.
Short-term Specimens
Short-term specimens are produced
from objects that you want to look at,
but don’t want to keep in your speci-
men collection. These specimens
are only meant to be observed for
a short period of time, after which
they are disposed of. For short-term
specimens, place the object on the
slide and place a cover slip on top of
it. After looking at the object, clean
the slide and cover slip. One of the
secrets of successful observation
with microscope is the use of clean
slides and cover slips. Spots or
stains would only distract you when
looking at an object.

6
40X - 640X Microscope Set
Permanent Prepared Specimens
Permanent prepared specimens are
produced from objects you will likely
want to look at again and again. The
preparation of dry objects (pollen, the
wings of a y, etc.) can only be done
with a special glue. This glue is called
„gum media“ and can be purchased at a
local hobby store or online. Objects that
contain liquid must rst have the liquid
taken out of them.
How to Prepare a Dry Object
First, place the object in the middle of
a clean slide and cover it with a drop of
glue (gum media). Then place a cover
slip on the object that is covered in the
chemical. Lightly press the cover slip so
that the glue spreads to the edges. Now
you have to let the specimen harden
for 2-3 days. Only then is the specimen
rmly glued so you will be able to use it.
How to Prepare a Smear
Specimen
For a smear specimen, a drop of
the liquid to be observed (e.g.,
water from a puddle in the forest) is
placed on the end of the slide using
a pipette. Then you can smear the
liquid across the slide with the help
of a second slide. Before observing,
let the substance dry together for a
few minutes.
Experiments
Experiment No. 1:
Black and White Print
Objects:
• Small piece of paper from a
newspaper with a black and white
picture and some text
• Similar piece of paper from a magazine
with color pictures and text
In order to observe the letters and
the pictures, produce a short-term
slide from each object. Now, set
your microscope to the lowest
magnication and use the specimen
from the newspaper. The letters
on the newspaper look frayed and
broken, since they are printed on
raw, low-quality paper. The letters
on the magazine look smoother and
more complete. The pictures in the
newspaper are made up of many tiny
dots, which appear slightly smudgy.
The halftone dots of the magazine
picture are clearly dened.
Experiment No. 2:
Color Print
Objects:
• Small piece of color-printed
newspaper.
• Similar piece of paper from a
magazine.
Make short-term specimens from the
objects and observe them with the
lowest magnication. The colored
halftone dots of the newspaper often
overlap. Sometimes, you‘ll even
notice two colors in one dot. In the
magazine, the dots appear clear and
rich in contrast. Look at the different
sizes of the dots.
Experiment No. 3:
Textile Fibers
Objects and Accessories:
• Threads from various fabrics (e.g., cotton,
linen, wool, silk, rayon, nylon, etc.).
• 2 needles.
Each thread is placed on a slide
and frayed with the help of the two
needles. Next, wet the threads and
cover them with a cover slip. Set
the microscope to one of the lower
magnications. Cotton bers come
from a plant, and look like a at,
twisted ribbon under the microscope.
The bers are thicker and rounder at
the edges than in the middle. Cotton
bers are basically long, collapsed
tubes.
Linen bers also come from a plant,
and they are round and run in one
direction. The bers shine like silk
and exhibit countless bulges on the
thread.
Silk comes from an animal and is
made up of solid bers that are
small in diameter, in contrast to the
hollow plant-based bers. Each ber
is smooth and even and looks like a
tiny glass tube.
The bers of the wool also come
from an animal. The surface is
made of overlapping sleeves that
look broken and wavy. If possible,
compare wool from different weaving
mills. In doing so, take a look at the
different appearance of the bers.
Experts can determine which country
the wool came from by doing this.
Rayon is a synthetic material that is
produced by a long chemical process.
All the bers have solid, dark lines
on the smooth, shiny surface. After
drying, the bers curl into the same
position. Observe the differences and
the similarities.
Experiment No. 4:
Table Salt
Object:
• Common table salt
First, place a few grains of salt on a
slide and observe the salt crystals
with the lowest setting of your
microscope. The crystals are tiny
cubes and are all the same shape.
Experiment No. 5:
Production of Salt Crystals
Objects and Accessories:
• Table salt
• A graduated cylinder lled halfway
with warm water to dissolve the salt
• Cotton thread
• Paper clips
• A matchstick or pencil
Add salt to the water until it no longer
dissolves. You now have a saturated
salt solution. Wait until the water
has cooled. Fix a paper clip to the
end of the cotton thread. The paper
clip serves as a weight. Tie the other
end of the cotton thread into a knot
around the match, and dip the end
with the paper clip in the salt solution.
Place the match horizontally on top
of the test tube. It prevents the cotton
thread from slipping all the way down
into the test tube. Now, place the tube
in a warm place for 3-4 days. If you
take a look at the glass after a few
days under the microscope, you can
see that a little colony of salt crystals
has formed on the cotton thread.
Experiment No. 6:
How do you raise Brine Shrimp?
Accessories (from your microscope
set):
• Shrimp eggs (not included)
• Sea salt
• Hatchery
• Yeast

7
40X - 640X Microscope Set
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
are produced. These eggs, called
“winter eggs,” have a thick shell,
which protects them. The winter
eggs are very resistant and capable
of survival, even if the marsh or lake
dries out, killing off the entire shrimp
population. The winter eggs can exist
for 5-10 years in a “sleep” status
and will only hatch when the proper
environmental conditions occur.
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
rst 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 ll 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 can also add the salt
solution along with a few eggs to
each of the four compartments of
the tank. The temperature should be
around 25ºF. 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 salt water
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
the shrimp population in the habitat.
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.
UKCA Declaration of Conformity
Bresser GmbH has issued
a „Declaration of Conform-
ity“ in accordance with ap-
plicable guidelines and corresponding
standards. The full text of the UKCA
declaration of conformity is available at
the following internet address:
www.bresser.de/download/9619742/
UKCA/9619742_UKCA.pdf
Bresser UK Ltd. • Suite 3G, Eden House,
Enterprise Way, Edenbridge, Kent TN8
6Hf, Great Britain
EC Declaration of Conformity
Bresser GmbH has issued a
“Declaration of Conformity”
in accordance with applica-
ble guidelines and corre-
sponding standards. The full text of the
EU declaration of conformity is availa-
ble at the following internet address:
www.bresser.de/download/9619742/
CE/9619742_CE.pdf
Disposal
Dispose of the packaging materi-
als properly, according to their
type, such as paper or cardboard.
Contact your local waste-disposal ser-
vice or environmental authority for infor-
mation on the proper disposal.
Do not dispose of electronic
devices in the household gar-
bage!
As per Directive 2002/96/EC of the
European Parliament on waste elec-
trical and electronic equipment and
its adaptation into German law, used
electronic devices must be collected
separately and recycled in an envi-
ronmentally friendly manner. Empty,
old batteries must be disposed of at
battery collection points by the con-
sumer. You can find out more infor-
mation 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 regula-
tions concerning batteries and
rechargeable batteries, dispos-
ing of them in the normal household
waste is explicitly forbidden. Please
make sure to dispose of your used
batteries as required by law — at a lo-
cal 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.
Cd¹ Hg² Pb³
1 battery contains cadmium
2 battery contains mercury
3 battery contains lead

Contents and colors may vary.
Do not mix old and new batteries. Do not mix alkaline,
standard (carbon-zinc), or rechargeable batteries.
Warning- The lens contains lead that may be harmful.
Wash hands after touching.
Manual_9619742_Microscope-40x-640x_en_NGKIDS_v042021a Errors and technical changes reserved.
AFTER SALES SUPPORT
YEAR WARRANTY
3
MODEL: 9619742 PRODUCT CODE: 707758 11/2021
www.bresser.de
00800 6343 7000
GB
00800 6343 7000
IRE
© National Geographic Partners LLC. All rights reserved.
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