levenhuk ST Series Stereo Microscopes User Manual

: July 30, 2024
: levenhuk

Table of Contents

levenhuk ST Series Stereo Microscopes
Product Usage Instructions
Overview
General Information
Stage inset glass
Preparations
Changing objective lenses
Specifications
Care and maintenance
Battery safety instructions
Levenhuk International Lifetime Warranty
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

levenhuk ST Series Stereo Microscopes

levenhuk-ST-Series-Stereo-Microscopes-PRODUCT

Specifications

Levenhuk 1ST
- Head: binocular, vertical
- Optics material: optical glass
- Magnification: 20x
- Eyepiece tube diameter: 23.2mm
- Eyepieces: WF10x (2pcs)
- Objectives: 2x
- Working distance: 65mm
- Inter pupillary distance: 55-75mm
- Glass stage inset: 50mm, with stage clips, white stage plate
- Eyepiece diopter adjustment: N/A
- Focus: coarse, 35mm
- Power supply: 2pcs AA batteries (not included in the kit)
- Illumination: upper and lower halogen, 10W
- Operating temperature range: N/A
- Additional accessories: dust cover
Levenhuk 2ST

Product Usage Instructions

Assembly and Setup

Place the microscope on a stable, flat surface.
Insert the required batteries or connect to a power source as per the model specifications.
Adjust the interpupillary distance and eyepiece diopter if necessary.
Secure the specimen on the stage using the stage clips

FAQ:
Q: Can I use the microscope without batteries?
A: Depending on the model, some microscopes can be powered b connecting to an external power source instead of using batteries.

Overview

Pole
Locking knob
Focus knob
Eyepieces
Diopter adjustment ring
Binocular head
Objective(s)
Stage clips
Stage
Upper illumination (reflected light)
Battery compartment
Illumination switch
Glass stage inset
Lower illumination (transmitted light, in the base)
Brightness adjustment wheel
Power connector
Power switch

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Levenhuk ST Series Stereo Microscopes
Please read this manual carefully before using your microscope for the first time.

General Information

Levenhuk 1ST, Levenhuk 2ST, Levenhuk 3ST and Levenhuk 4ST microscopes were designed to be used during assembly of intricate equipment, including electronics; for school experiments and scientific research. All models may be found in schools and research institutes, at home and in manufacturing plants.

Using the microscope
Illumination (Levenhuk 1ST, Levenhuk 3ST, Levenhuk 4ST)
Plug your microscope into a power source or insert batteries, turn it on and choose the required illumination source. If your microscope is fitted with brightness control, you can also choose the brightness level of illumination.

Stage inset glass

Frosted glass stage inset may be used for observations of transparent specimens or thin slices of objects. Place it on the stage and secure it in place with the locking screw. Lower illumination source should be used during observations with this glass stage inset.
The kit of your new microscope may also include a black and white glass stage inset. Normally, you would want to use the white side; however, if a specimen is very bright, or colored white, you should use the black side for additional contrast. Upper illumination source should be used during observations with this glass stage inset. Before installing the black and white glass make sure to remove the frosted glass from the stage.

Preparations

Place a specimen in the center of a blank slide, put the slide on the stage and lock it in place with stage clips.

Eyecups
For additional comfort during observations you can use rubber eyecups on both eyepieces.

Focusing, diopter adjustment, interpupillary distance
Place a slide on the stage and lock it in place with stage clips. Loosen the locking knob on the microscope pole and slide the head up or down into a desired position and retighten the locking knob. Look through the right eyepiece and turn the objective lens handle until you see the specimen in your field of view. Afterwards, turn the focus knob until the image is sharp and clear. Look through the left eyepiece and rotate the diopter adjustment ring until the image is sharp and clear. Do not adjust focus during diopter adjustment! Upon completing this process, look through both eyepieces, hold them with your hands and bring them closer or move them apart until a double image turns into a single image.

Changing objective lenses

Levenhuk 3ST and Levenhuk 4ST has a revolving nosepiece with two objective lenses. To switch between them, you have to rotate the nosepiece.

Changing lamps
CAUTION! Before changing a lamp or a fuse make sure the microscope is unplugged from a power source. Also, wait until the lamp cools down.

Changing the upper illumination lamp
Loosen the locking screw on the upper illumination housing and remove the light socket from within. Replace the old lamp with a new one and put the light socket back. Retighten the locking screw.

Changing the lower illumination lamp
Loosen the locking screw on the stage and remove the glass. Remove the old lamp from the light socket and replace it with a new one. Put the glass back in its place and retighten the locking screw.

Changing the fuse replacement
The fuse box is located on the bottom of the microscope base. Remove the cover and replace the old fuse with a new fuse.

Specifications

| Levenhuk 1ST| Levenhuk 2ST| Levenhuk 3ST| Levenhuk 4ST
---|---|---|---|---
Head| binocular, vertical| binocular, inclined at 45°
Optics material| optical glass
Magnification| 20х| 40х| 20—40х
Eyepiece tube diameter| 23.2mm| 30.5mm| 30mm
Eyepieces| WF10x (2pcs)
Objectives| 2x| 4x| 2x, 4x
Working distance| 65mm| 60mm| 57mm| 130mm
Interpupillary distance| 55—75mm| 60mm| 60mm| 55—75mm
Glass stage inset| 50mm, with stage clips, white stage plate| 50mm, with stage clips, double-sided (black and white, plastic) stage plate| 90mm, matte glass stage with stage clips, additional double- sided (black and white, plastic) stage plate| 95mm, matte glass stage with stage clips, additional double- sided (black and white, plastic) stage plate
Eyepiece diopter adjustment| —| ±5 D
Focus| coarse, 35mm| coarse, 40mm| coarse, 35mm
Power supply| 2pcs AA batteries (not included in the kit)| —| 220V/50Hz or 110V/60Hz (optional)
Illumination| upper (0.06W LED)| natural illumination| upper and lower halogen, 10W| upper (1W LED) lower (2W LED)
Operating temperature range| —5…40 °C (23…104 °F)| 5…35 °C (41…95 °F)
Additional accessories| dust cover| **** rubber eyecups (2pcs)| rubber eyecups (2pcs), backup halogen lamp 12V/10W| rubber eyecups (2pcs), dust cover

The manufacturer reserves the right to make changes to the product range and specifications without prior notice.
Caution: Please refer to the specifications table for the correct mains voltage and never attempt to plug a 110V device into 220V outlet and vice versa without using a converter. Remember that mains voltage in the U.S. and Canada is 110V and 220—240V in most European countries.

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; taking 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 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 risk of ingestion, suffocation, or poisoning.
Do not disassemble batteries.
Utilize used batteries as prescribed by your country laws.

Levenhuk International Lifetime Warranty

All Levenhuk telescopes, microscopes, binoculars and other optical products, except for accessories, carry a lifetime warranty against defects in materials and workmanship. Lifetime warranty is a guarantee on the lifetime of the product on the market. All Levenhuk accessories are warranted to be free of defects in materials and workmanship for six months from date of retail purchase. The warranty entitles you to free repair or replacement of the Levenhuk product in any country where a Levenhuk office is located if all warranty conditions are met.
For further details please visit our web site: www.levenhuk.com/warranty
If warranty problems arise, or if you need assistance in using your product, contact the local Levenhuk branch.

Levenhuk prepared slides sets
The Levenhuk slides sets include thoroughly prepared specimens of various biomaterials as well as blank slides and cover glasses for you to make your own specimens. Prepared slides, blank slides and cover slips can be used with any microscope model.

Levenhuk, Inc. 924-D East 124th Ave. Tampa, FL 33612 USA Levenhuk® is a registered trademark of Levenhuk, Inc.
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