BRESSER 9203820000000 Oxford 40x-2000x Microscope Instruction Manual
- June 5, 2024
- BRESSER
Table of Contents
BRESSER 9203820000000 Oxford 40x-2000x Microscope
OVERVIEW
GENERAL WARNINGS
- Choking hazard — This product contains small parts that could be swallowed by chil-dren. 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.
- 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 or with different capacities. Remove the batteries from the unit if it has not been used for a long time.
- Never recharge normal, non-rechargeable batteries. This could lead to explosion during the charging process.
- 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.
DISPOSAL
Dispose of the packaging materials properly, according to their type (paper,
cardboard, etc). 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 the Directive 2012/19/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 01.06.2006 from your local waste disposal service or
environmental authority. In accordance with the regulations concerning
batteries and rechargeable batteries, disposing of them in the normal
household waste is expli-citly forbidden. Please pay attention to dispose of
your used batteries as required by law – at a local collection point or in the
retail market (a disposal in domestic waste violates the Battery Directive).
Batteries that contain toxins are marked with a sign and a chemical symbol.
„Cd“ = cadmium, „Hg“ = mercury, „Pb“ = lead.
Here are the parts of your microscope
- 10x WF Eyepiece
- 25x WF Eyepiece
- 2x Barlow Lens
- Eyepiece supports
- Microscope Head with locking screw
- Objective Nosepiece
- Objective
- Clips
- Microscope Stage
- LED Illumination (transmitted light)
- Microscope Base
- Selection switch for Illumination
- Dimmer for Illumination
- Battery compartment
- Focus knob
- Colour Filter wheel
- LED Illumination (reflected light)
- Slides, Cover Slips and Prepared Specimens plastic box 19 Specimens:
- Yeast
- Sea Salt
- Shrimp Eggs
- Empty Bottle
- Specimen slicer 21 Hatchery
- Tweezers
- Dissecting needle 24 Dissecting knife 25 Pipette
- Container
- Smartphone holder
How do I use my microscope?
Before you assemble your microscope, make sure that the table, desk or
whatever surface that you want to place it on is stable, and does not wobble.
How do I operate the electric LED illumination?
On the base of the microscope there is a battery compartment (14). Loosen the screw on the battery compartment cover with a small Philips screwdriver and remove the cover. Place the batteries in the compartment so that the flat minus poles (-) press against the spring terminal and the plus poles (+) are touching the flat contact sheets. Close the battery compartment with the cover and turn the microscope around again. The first lamp shines onto the specimen from below and the second from above. (The thing that you want to observe with the microscope is called the object or specimen, by the way.) You can use each lamp on its own, by using the selection switch (12). For example:
- the light only comes from below (transmitted light).
- the light only comes from above (reflected light).
For transparent objects (transmitted-light objects), number I is best. In order to observe firm, non-transparent objects (direct-light objects), select number II. With the dimmer (13) you can adjust the brightness of the illumination
When do I use the color filters?
The colour filter wheel (16) is located below the microscope stage (9). They
help you when you are observing very bright or clear specimens. Here, you can
choose from various colours. This helps you better recognise the components of
colourless or transparent objects (e.g. grains of starch, protozoa).
How do I adjust my microscope correctly?
First, loosen the screw (5) and turn the microscope head into a comfortable
viewing position. Each observation starts with the lowest magnification.
Adjust the microscope stage (9) so that it goes all the way down to the lowest
position, using the focus knob (15). Then, turn the objective nosepiece (6)
until it clicks into place at the lowest magnification (objective 4x).
Note:
Before you change the objective setting, always move the microscope stage (9)
to its lowest position. This way, you can avoid causing any damage!
Now, insert the 10x eyepiece (1) into the Barlow lens (3). Make sure that the Barlow lens is placed all the way into the eyepiece supports (4) and is not pulled out.
How do I observe the specimen?
After you have assembled the microscope with the adequate illumination and
adjusted it correctly, the following basic rules are to be observed: Start
with a simple observation at the lowest magnification. This way, it is easier
to position the object in the middle (centering) and make the image sharp
(focusing). The higher the magnification, the more light you will require for
a good image quality. Now place the prepared specimen (18) directly under the
objective on the microscope stage. The object should be located directly over
the illumination (10).
In the next step, take a look through the eye-piece (1) and carefully turn the focus knob (15) until the image appears clear and sharp. Now you can select a higher magnification by slowly removing the Barlow lens (3) from the eyepiece support (4). When the Barlow lens is almost completely pulled out, the magnification can be increased to almost double. If you would like an even higher level of mag-nification, insert the 25x eyepiece (2) and turn the objective nosepiece (6) to a higher setting (10x or 40x).
Important tip:
The highest magnification is not always the best for every specimen!
Note:
Each time the magnification changes (eyepiece or objective change, pulling out
the Barlow lens), the image sharpness must be readjust-ed with the focus knob
(15). When doing this, make sure to be careful. If you move the mi-croscope
stage too quickly, the objective and the slide could come into contact and
become damaged!
Which light for which specimen?
With this unit, a reflected light and transmitted light microscope, you can
observe transparent, semi-transparent as well as non-transparent objects. The
image of the given object of observation is “transported” through the light.
As a result, only the correct light will allow you to see some-thing! If you
are observing non-transparent (opaque) objects (e.g. small animals, plant
components, stones, coins, etc.) with this microscope, the light falls on the
object that is being observed. From there, the light is reflected back and
pass-es through the objective and eyepiece (where it gets magnified) into the
eye. This is reflected light microscopy. For transparent objections (e.g.
protozoa), on the other hand, 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 magnified, and fi-nally
goes into the eye. This is transmitted-light microscopy. Many microorganisms
in water, many plan components and the smallest animal parts are already
transparent in nature. Others have to be prepared. We may make them transpar-
ent through a treatment or penetration with the right materials (media), or by
taking the thin-nest slices from them (by hand or a specimen slicer), and then
examine them. You can read more about this in the following sections.
How do I make thin specimen slices?
Only do this with the supervision of your par-ents or another adult.
In order to get the best results, you will need some wax or paraffin. It is
best if you use a can-dle. Place the wax in a pot and heat it carefully over a
low heat. Now, dip the object in the liquid wax a few times. Then, let the wax
get hard. Us-ing the Specimen slicer (20) or a knife/scalpel, cut the smallest
slices from the object that is covered with wax. These slices are to be laid
on a slide and covered with a cover slip.
How do I make my own specimens?
Take the object that you want to observe and place it on a glass slide (18).
Then, add a few drops of distilled water on the object using a pipette. Now,
place a cover slip vertically at the edge of the drop of water, so that the
water runs along the edge of the cover slip. Then, slowly lower the cover slip
over the water drops.
Experiments
Use the following web link to find interesting experiments you can try out.
http://www.bresser.de/downloads
Troubleshooting
| Error | Solution |
|---|---|
| No recognisable image | • Turn on light |
• Readjust focus
Make sure your microscope has a long service life.
Clean the lens (objective and eyepiece) only with the cloth supplied or some
other soft lint-free cloth (e.g.microfibre). Do not press hard as this might
scratch the lens. Ask your parents to help if your microscope is really very
dirty. The cleaning cloth should be moistened with cleaning fluid and the lens
wi-ped clean using little pressure. Make sure your microscope is always
protec-ted against dust and dirt. After use leave it in a warm room to dry
off. Then install the dust caps and keep it in the case provided.
Smartphone holder
Open the flexible holder and put your smart-phone in it. Close the cradle and
make sure your phone is properly seated. The camera must be positioned exactly
above the eyepiece. Open the locking clip on the back of the holder and fit
the eyepiece view exactly onto your smart-phone camera. Now retighten the
locking clip and attach the smartphone holder to the eye-piece of your
microscope. Now start the cam-era 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. Re-move the smartphone from the cradle after
use!
NOTE:
Make sure that the smartphone cannot slip off the cradle. Bresser GmbH accepts
no liability for damage caused by a dropped smartphone!
Warranty
The regular warranty period is 2 years and be-gins on the day of purchase. To
benefit from an extended voluntary guarantee 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 war-ranty period and details of our services at
www.bresser.de/warranty_terms.
References
- art.no
- Bresser | Downloads | Expand Your Horizon
- Bresser | FAQ | Expand Your Horizon
- Bresser | Ratgeber | Expand Your Horizon
- Bresser | UNIVERSITY OF OXFORD Mikroskop 40x-2.000x | Expand Your Horizon