Bresser NATIONAL GEOGRAPHIC 9619742 User manual

1
40X-640X
ZOOM MICROSCOPE
AFTER SALES SUPPORT
YEAR WARRANTY
3
MODEL: 9619742 PRODUCT CODE: 79915 11/2018
www.bresser.de
00800 6343 7000
GB
00800 6343 7000
IRE
SMARTPHONE
ADAPTOR INCLUDED
phone not included
x2
INCLUDED
Model Number: 9619742
Product Code: 79915
Operating instructions
A
AA A
This product contains functional sharp
edges and points. Not suitable for children
under eight years. Adult supervision required.
WARNING:

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
WARNING!
This product contains functional sharp
edges and points. Choking hazard - small
parts. Not suitable for children under
eight years. Adult supervision required.
Supervision by Adults
Read and follow the instructions,
safety rules and rst aid information.
This Microscope set is intended
for children over the age of
8 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/9619740

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) 1 Prepared Slide
13) 2 Blank Slides
14) 8 Slide Covers
15) 3 Specimen Vials
16) Graduated Cylinder
17) Pipette
18) Tweezers
19) Magnifying Glass
20) Round Cutter
21) Hatchery
22) 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 and insert
the batteries according to the
displayed +/- information. Snap-
close the battery compartment
door.
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 (Fig. 5) is located in
the middle of the microscope stage
(Fig. 3). They help you when you
are 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 (Fig. 3) so that
the stage is at the lowest position.
Then turn the objective turret (Fig.
7) until it clicks into place at the
lowest magnication (objective
4X). Note: Before you change the
objective setting, always move the
microscope stage (Fig. 3) to its
lowest position. This way, you can
avoid causing any damage to the
slide or microscope. Make sure
the zoom eyepiece (Fig. 1) is also
in the fully lowered position.
Note: The highest magnication
is not always the best for every
specimen.
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40X - 640X Microscope Set
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 (Fig. 3) securing
with the stage clips (Fig 4). The
object/specimen should be located
directly over the illumination
(Fig. 8). At this point, take a look
through the eyepiece and carefully
turn the focus knob (Fig. 2) until
the image appears clear and
sharp. Now you can select a higher
magnication by slowly turning the
zoom eyepiece (Fig. 1). 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 (Fig. 7) 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 (Fig. 2). 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
How do I use the Smartphone
adaptor?
Attach the smartphone adaptor to
the eyepiece.
The suction cups must be clean
and free from dust and dirt. A slight
moistening is helpful. Now press
your smartphone on the retaining
plate and make sure that it is
properly secured. As a backup, you
should secure it with the enclosed
rubber strap. Smartphones with a
rough surface will not hold as good
as smartphones with a smooth
surface.
Now start the Camera app.
The camera needs to rest just
above the eyepiece. Center the
smartphone exactly over the
eyepiece, so the image can be seen
precisely centered on your screen.
In some cases you need to adjust
with the zoom function to display
the image fullscreen. A light
shading at the edges is possible.
Take the smartphone carefully off
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.

5
40X - 640X Microscope Set
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.
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
specimens: 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 specimen 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.
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.

6
40X - 640X Microscope Set
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.
EC Declaration of Conformity
Bresser GmbH has issued a
Declaration of Conformity‘ in
accordance with applicable
guidelines and corresponding standards.
This can be viewed any time upon request.
Disposal
Dispose of the packaging materials
properly, according to their type,
such as paper or cardboard. Con-
tact your local waste-disposal service or
environmental authority for information on
the proper disposal.
Do not dispose of electronic devic-
es 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 elec-
tronic 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 pro-
duced after 6 January 2006 from your local
waste-disposal service or environmental
authority.
In accordance with the regulations
concerning batteries and recharge-
able batteries, disposing 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 local collection point or in the retail mar-
ket. 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_NATGEO_v062018a
© 2018 National Geographic Partners LLC.
All rights reserved. NATIONAL GEOGRAPHIC and
Yellow Border Design are trademarks of the
National Geographic Society, used under license.
Visit our website: www.nationalgeographic.com
Errors and technical changes reserved.
40X-640X
ZOOM MICROSCOPE
Bresser UK Ltd.
Unit 1 Starborough Farm
Starborough Road
Marsh Green
Edenbridge, Kent TN8 5RB
United Kingdom
AFTER SALES SUPPORT
YEAR WARRANTY
3
MODEL: 9619742 PRODUCT CODE: 79915 11/2018
www.bresser.de
00800 6343 7000
GB
00800 6343 7000
IRE