BRESSER 8851301 40X Junior Microscope Instruction Manual

: June 4, 2024
: BRESSER

Table of Contents

BRESSER 8851301 40X Junior Microscope
General Warnings
Parts overview
What is a microscope?
Normal observation
Observation (electronic light source)
Condition and prepare viewed objects
EC Declaration of Conformity
Disposal
Warranty & Service
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

BRESSER 8851301 40X Junior Microscope

BRESSER 8851301 40X Junior Microscope-pro

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 with battery acid on the skin, eyes, and mucous membranes. In the event of contact, rinse the affected region immediately with 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 an 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

BRESSER 8851301 40X Junior Microscope-1

Zoom Eyepiece
Focus knob
Objective turret
Stage
On/off switch (illumination)
Electronic light source
Base with battery compartment
Battery compartment (3x AA)
Wheel with pinhole apertures / Filter wheel

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 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 (9) below the microscope stage (4) will help you in viewing very bright or clear-sighted preparations. Turn the wheel (9) 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 experiments with a low magnification.

Condition and prepare viewed objects

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). Some small water organisms, plant parts and animal components are transparent by nature, but many others require pretreatment — that is, you need to make the thinnest possible slice of the object by hand cutting or using a microtome, and then examine this sample.

Experiments
Use the following web link to find interesting experiments you can try out.
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. This can be viewed at any time upon request.

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. The disposal of domestic waste violates the Battery Directive. Batteries that contain toxins are marked with a sign and a chemical symbol.

Warranty & Service

The regular guarantee period is 2 years and begins 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 guarantee terms as well as information on extending the guarantee period and details of our services at: www.bresser.de/warranty_terms

Bresser GmbH
Gutenbergstr. 2
DE-46414 Rhede
Germany
www.bresser-junior.de