levenhuk 77955 Discovery Micro Terra Microscope User Manual

: June 5, 2024
: levenhuk

Table of Contents

Levenhuk 77955 Discovery Micro Terra Microscope
OVERVIEW
Microscope parts
Using the microscope
Specifications
Care and maintenance
Battery safety instructions
Levenhuk Warranty
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Levenhuk 77955 Discovery Micro Terra Microscope

levenhuk-77955-Discovery-Micro-Terra-Microscope

OVERVIEW

levenhuk-77955-Discovery-Micro-Terra-Microscope-FIG-1

Eyepiece
Monocular head (eyepiece tube)
Revolving nosepiece with objectives
Focusing knob
Specimen holders
Stage
Diaphragm disk
Lower illumination
Lower illumination switch
Base

General use

The Discovery Micro microscope is safe for health, life and property of the consumer and the environment when properly used, and meets the requirements of international standards. The microscope is designed for observing transparent objects in the transmitted light using the bright field method. May be used by kids over 5 years old.

Caution! Children should use the microscope under an adult’s supervision only.

Microscope parts

Base. It supports the weight of the microscope and houses the illumination source, electronics and control mechanisms.
Eyepiece tube. Combines the eyepiece with the objectives system.
Eyepiece and objective. Consists of lenses that allow magnifying the image. The total magnification is calculated by multiplying the eyepiece magnification to the objective magnification.
Revolving nosepiece. This triple nosepiece with 3 pre-installed objectives allows you to change objectives smoothly and easily.
Stage. A sturdy and reliable stage with two specimen holders can be used to move your slides while observing them. The lower illumination light passes through the opening in the middle of the stage.
Diaphragm disk. Is located below the stage and has apertures of various diameters to adjust the passing light rays. Rotate the disk to select the desired aperture.
Focusing knob. A coarse focusing system allows moving the stage up and down adjusting the sharpness of the specimen image.
Lower illumination. LED illumination with adjustable brightness can be powered by 2 AA batteries. The lower illumination is used to observe transparent objects. Using a supplemental light source, such as a table lamp, directed at the specimen will enable you to observe less transparent objects.

Using the microscope

Getting started

Unpack the microscope and make sure all parts are available.
Move the stage to the lowermost position using the focusing knob.
Make sure the batteries are correctly installed in the battery compartment; insert new batteries if required.
Slowly adjust the illumination brightness, from dark to light.

Focusing

Place a specimen on the stage and fix it with the holders.
Select the 4x objective rotating the revolving nosepiece.
Move the specimen to place its thickest part exactly under the objective.
Rotate the focusing knob to slowly raise the stage until the objective is close to the specimen; keep checking the distance between the objective and the object to avoid their contact. Caution! The objective should not touch the specimen, otherwise the objective or/and the specimen might be damaged.
Look through the installed eyepiece and lower the stage slowly rotating the focusing knob until you see the specimen image.
Such adjustment protects the frontal lens from contacting the object when you use objectives of other magnifications; though, slight refocusing might be required.
If the image is too bright, rotate the diaphragm disk until the passing light ray is reduced to a comfortable brightness level. If the image is too dark, select a larger aperture to increase the light ray.

Selecting the objective
Start your observations with the lowest magnification objective and select a specimen segment for detailed research. Then move the specimen to center the selected segment in the field of view, to make sure it keeps centered when the objective is changed to a more powerful one. Once the segment is selected, you should center its image in the microscope’s field of view as precisely as possible. Otherwise, the desired segment might fail to center in the field of view of the higher power objective. Now you can switch to a more powerful objective by rotating the revolving nosepiece. Adjust the image focus if required.

Specifications

Type biological
Magnification, x 40–640
Head monocular, inclined 45°
Optics material optical plastic
Body material plastic
Eyepieces WF10x–WF16x
Revolving nosepiece 3 objectives
Objectives 4х, 10х, 40х
Stage, mm diameter 82, with specimen holders
Stage moving range, mm 0–15, vertical
Focusing coarse
Diaphragm disk +
Illumination lower LED illumination with adjustable brightness
Power source 2*АА batteries

The manufacturer reserves the right to make changes to the product range and specifications without prior notice. Note: Batteries might be pre-installed in the battery compartment by the manufacturer.

Care and maintenance

Never, under any circumstances, look directly at the Sun, another bright source of light or at a laser through this device, as this may cause PERMANENT RETINAL DAMAGE and may lead to BLINDNESS.
Take necessary precautions when using the device with children or others who have not read or who do not fully understand these instructions.
After unpacking your microscope and before using it for the first time check for integrity and durability of every component and connection.
Do not try to disassemble the device on your own for any reason. For repairs and cleaning of any kind, please contact your local specialized service center.
Protect the device from sudden impact and excessive mechanical force. Do not apply excessive pressure when adjusting focus. Do not overtighten the locking screws.
Do not touch the optical surfaces with your fingers. To clean the device exterior, use only special cleaning wipes and special optics cleaning tools from Levenhuk. Do not use any corrosive or acetone-based fluids to clean the optics.
Abrasive particles, such as sand, should not be wiped off lenses, but instead blown off or brushed away with a soft brush.
Do not use the device for lengthy periods of time, or leave it unattended in direct sunlight. Keep the device away from water and high humidity.
Be careful during your observations, always replace the dust cover after you are finished with observations to protect the device from dust and stains.
If you are not using your microscope for extended periods of time, store the objective lenses and eyepieces separately from the microscope.
Store the device in a dry, cool place away from hazardous acids and other chemicals, away from heaters, open fire and other sources of high temperatures.
When using the microscope, try not to use it near flammable materials or substances (benzene, paper, cardboard, plastic, etc.), as the base may heat up during use, and might become a fire hazard.
Always unplug the microscope from a power source before opening the base or changing the illumination lamp. Regardless of the lamp type (halogen or incandescent), give it some time to cool down before trying to change it, and always change it to a lamp of the same type.
Always use the power supply with the proper voltage, i.e. indicated in the specifications of your new microscope. Plugging the instrument into a different power outlet may damage the electric circuitry of the microscope, burn out the lamp, or even cause a short circuit.
Seek medical advice immediately if a small part or a battery is swallowed.

Battery safety instructions

Always purchase the correct size and grade of battery most suitable for the intended use.
Always replace the whole set of batteries at one time; take care not to mix old and new ones or batteries of different types.
Clean the battery contacts and also those of the device prior to battery installation.
Make sure the batteries are installed correctly with regard to polarity (+ and -).
Remove batteries from equipment that is not to be used for an extended period of time.
Remove used batteries promptly.
Never attempt to recharge primary batteries as this may cause leakage, fire, or explosion.
Never short-circuit batteries as this may lead to high temperatures, leakage, or explosion.
Never heat batteries in order to revive them.
Remember to switch off devices after use.
Keep batteries out of the reach of children, to avoid the risk of ingestion, suffocation, or poisoning.
Utilize used batteries as prescribed by your country’s laws.

Levenhuk Warranty

Levenhuk products, except for their accessories, carry a 2-year warranty against defects in materials and workmanship. All Levenhuk accessories are warranted to be free of defects in materials and workmanship for six months from the purchase date. The warranty entitles you to the free repair or replacement of the Levenhuk product in any country where a Levenhuk office is located if all the warranty conditions are met.
For further details please visit our website: www.levenhuk.com/warranty
If warranty problems arise, or if you need assistance in using your product, contact the local Levenhuk branch.