Levenhuk D85L LCD and D95L LCD Digital Microscopes

Product Overview

The Levenhuk D85L LCD and D95L LCD digital microscopes are designed for observing transparent objects using transmitted light with a bright-field method. They are suitable for a wide range of applications including clinical tests, educational demonstrations, bacterioscopy, cytology, and scientific research in various fields.

These microscopes are safe for health, life, property, and the environment when used correctly and comply with international standards.

Diagrams

The following descriptions correspond to the diagrams illustrating the microscope models:

Figure 1a: Levenhuk D85L LCD

This diagram shows the Levenhuk D85L LCD digital microscope. It features an integrated LCD screen at the top, an eyepiece tube, a revolving nosepiece holding multiple objective lenses, a stage equipped with clips to secure specimens, coarse and fine focusing knobs, and a base that houses the illumination system.

Figure 1b: Levenhuk D95L LCD

This diagram illustrates the Levenhuk D95L LCD digital microscope, which is similar in design to the D85L LCD. It also includes an integrated LCD screen, an eyepiece tube, a revolving nosepiece with objective lenses, a specimen stage with clips, focusing knobs, and a base with an illumination system. Minor variations may exist in the stage or condenser components compared to the D85L model.

Safety Information

General Safety Precautions

• Never point the instrument directly at the sun, laser light, or any other bright light source, as this can cause permanent retinal damage or blindness.
• Exercise caution when children or individuals unfamiliar with the instructions are using the equipment.
• Inspect the microscope and all its components for proper connection and condition before first use.
• Do not attempt to disassemble the device yourself, even for cleaning the mirror. Contact a service center for all repairs and cleaning.
• Protect the instrument from falls and excessive mechanical force. Do not use excessive force when adjusting focus. Do not overtighten locking screws.
• Avoid touching optical surfaces with your fingers. Use only Levenhuk-approved cleaning cloths and tools for external surfaces. Do not use corrosive agents or acetone-based cleaners on the optical system.
• Abrasive particles, such as sand grains, should be blown off lens surfaces or removed with a soft brush.
• Do not expose the instrument to prolonged sunlight. Keep away from water and do not store in high humidity conditions.
• Use caution during observation. After use, place the dust cover on the microscope to protect it from dust and contaminants.
• If using the microscope for extended periods, store objective lenses, eyepieces, and the microscope separately.
• Store the instrument in a dry, cool place, away from dust, hazardous acids, other chemicals, heaters, open flames, and other high-temperature sources.
• Avoid using the microscope near flammable materials or substances (benzene, paper, cardboard, plastic, etc.), as the base may heat up during use, posing a fire risk.
• Always disconnect the microscope from the power source before opening the base or replacing the lamp. Allow the lamp to cool down before attempting replacement, regardless of its type (halogen or incandescent). Always replace lamps with the same type.
• Ensure the power supply matches the voltage specified in the technical data. Connecting to a power outlet with a different voltage may damage the instrument's electrical circuits, burn out the lamp, or cause a short circuit.
• If a small part or battery is ingested, seek immediate medical assistance.

Battery Safety Instructions

• Use batteries of the correct type and size.
• Replace all batteries simultaneously. Do not mix old and new batteries or batteries of different types.
• Clean battery contacts and device contacts before inserting batteries.
• Ensure batteries are inserted with the correct polarity (+ and −).
• Remove batteries if the equipment will not be used for an extended period.
• Remove depleted batteries immediately.
• Do not short-circuit batteries, as this can lead to high temperatures, leakage, or explosion.
• Do not attempt to reactivate batteries by heating them.
• Remember to turn off the device after use.
• Keep batteries out of reach of children to prevent ingestion, suffocation, or poisoning.

International Warranty

All Levenhuk telescopes, microscopes, binoculars, and other optical products (excluding accessories) come with a lifetime warranty against manufacturing or material defects. This lifetime warranty covers the product's service life on the market. All Levenhuk accessories have a two-year warranty from the date of purchase against manufacturing or material defects. Levenhuk will repair or replace products or parts found to be defective upon inspection. This warranty is conditional upon returning the product to Levenhuk along with a valid proof of purchase.

This warranty does not cover consumable parts such as bulbs (electric, LED, halogen, energy-saving, etc.), batteries (rechargeable and non-rechargeable), or other consumable electrical parts.

For more details, visit: www.levenhuk.eu/warranty

For warranty issues or assistance with product use, contact your local Levenhuk branch.

Microscope Assembly

1. Carefully remove the microscope from the packaging and place it on a flat surface.
2. Remove plastic bags and the dust cover from the eyepiece head.
3. Install the LCD screen head and tighten the locking screw.
4. Inspect all items included in the kit and identify their purpose.
5. D95L LCD: Connect the power cable to the microscope and plug it into the outlet.
6. D85L LCD: Open the battery compartment, insert batteries according to the polarity markings, close the compartment, and turn on the microscope. Before initial use, charge the batteries: insert batteries into the compartment (observing polarity) and connect the microscope to the mains using the power adapter.

Operation

Refer to Figure 1a (Levenhuk D85L LCD) and Figure 1b (Levenhuk D95L LCD).

1. Turn on the power; the illumination will activate. Set the brightness to approximately 70%. Place the specimen on the stage and ensure it is securely held by the clips.
2. D85L LCD: Adjust the stage height by rotating the locking screw.
3. D95L LCD: The iris diaphragm should be adjusted according to the numerical aperture of the lens. It is best practice to set the iris diaphragm slightly smaller than the aperture of the selected lens. Open or close the iris diaphragm using the adjustment screws. Turning the adjustment screw clockwise fully opens the iris diaphragm. Note: The diaphragm is not used to adjust illumination brightness; use the brightness adjustment knob for that.
4. D95L LCD: Slide out the filter holder, insert a filter, and then return the holder to its original position.
5. D85L LCD: Rotate the diaphragm to reduce the light beam to a comfortable brightness level. If the image is too dark, select a larger aperture to increase the amount of light.
6. To change the objective magnification, rotate the revolving nosepiece until it clicks into place.
7. Ensure the lens does not touch the specimen when adjusting focus: rotate the coarse focus knob until the specimen is approximately 3.175 mm (1/8") from the lens.
8. Rotate the fine focus knob to achieve a sharp image. The fine focus mechanism allows for precise focusing on the observed specimen at high magnifications.
9. D95L LCD (Oil Immersion): When using an oil immersion objective, the space between the specimen and the lens must be filled with immersion oil. Raise the condenser to its top position and place a drop of oil on the lens and the specimen's coverslip. Move the revolving nosepiece back and forth to remove air bubbles from the oil. Then, secure the objective lens in the working position. Ensure the oil covers the entire space between the objective lens and the specimen. After use, wipe the lens dry.
10. D95L LCD (Mechanical Stage Scale): The position of the mechanical scale can be adjusted using the coarse focus knob. Rotate it clockwise to lock the selected position or counter-clockwise to unlock it.
11. D95L LCD (Stage Movement): To position the specimen in the field of view, move the stage horizontally forward and backward, or left and right, using the stage control knobs.
12. While viewing the monitor, use the focus knob to adjust the image focus.

LCD Display Operation

First Steps

• Connect the power cable to the LCD display's power socket and then to the mains. The LED indicator will light up red. Turn on the LCD display using the power button. The LED indicator will turn green.
• Insert an SD card (included) into the SD card slot to display images and save captured photos and videos.

Menu and Functions

• Camera functions and parameters can be controlled using the buttons on the back of the LCD display. After changing parameters, close the interface to save the data.
• Press the Menu button to access the menu. Select functions using the ↑↓ buttons. Open submenus with the → button. Press the Menu button again to save changed parameters and exit the interface.

Photos/Video

• Photos: Press the quick photo button on the LCD panel to take a photo. The photo will be saved to the SD card.
• Video: Before recording video, ensure the SD card is formatted with the FAT32 file system and has sufficient space. Photos cannot be taken while recording video. Open the menu and select "Record Video" to start recording.

Basic Settings

• White Balance: This parameter allows you to set the color temperature. The default option is "Auto White Balance".
• Exposure: The "Auto Exposure" option allows you to set the exposure value. The "Manual Exposure" option allows you to set the time parameter.
• Color Adjustment: This parameter allows you to adjust saturation, hue, brightness, and contrast.
• Monochrome: When this parameter is selected, the image will be displayed in various shades of a single color (e.g., grayscale).
• Flip: This function allows you to rotate the image horizontally or vertically.

Measurements

1. Cross Line: You can select a cross line in four colors, enable or disable its display, and adjust the position of the cross line's center point.
2. Calibration: The camera is calibrated by default, but recalibration may be necessary.
   • Place the calibration slide on the stage, aligning the scale horizontally on the screen. Achieve the sharpest possible focus.
   • Navigate to the Calibration menu. Drag a segment of the calibration line so that its ends align with the marks on the physical scale of the calibration slide. For increased accuracy, try to capture as many scale divisions as possible.
   • Example: The image above shows a 0.01 mm (10 µm) scale line with a 10x lens. The camera settings are: "magnification 10x", "units µm", "length 40".
   • Each objective lens should be calibrated to perform measurements at different magnifications.
   • After setting the parameters, close the calibration menu to complete the procedure.
3. Recalibration: The calibration process should be repeated if the magnification or focus has been changed during observation. Open the Measurements menu, select the magnification, set the start and end points, and the measured value will be displayed.

Technical Specifications

Fuse Replacement (Levenhuk D95L LCD)

Disconnect the microscope from the power source. Use a flat-head screwdriver to open the fuse socket on the rear of the microscope body. Remove the old fuse and install a new one. Only use fuses of the correct type. Close the fuse socket.

Technical Data

LCD Screen Technical Data

Other Specifications

Voltage Information

Please check the technical data table for the correct mains voltage value. Do not connect devices requiring 220V to a 110V outlet, or vice versa, without a converter. Note that mains voltage in most European countries is 220-240V, while in the USA and Canada it is 110V.

Maintenance and Care

Follow these guidelines to maintain your microscope:

• Never point the instrument directly at the sun, laser light, or any other bright light source, as this can cause permanent retinal damage or blindness.
• Exercise caution when children or individuals unfamiliar with the instructions are using the equipment.
• Inspect the microscope and all its components for proper connection and condition before first use.
• Do not attempt to disassemble the device yourself, even for cleaning the mirror. Contact a service center for all repairs and cleaning.
• Protect the instrument from falls and excessive mechanical force. Do not use excessive force when adjusting focus. Do not overtighten locking screws.
• Avoid touching optical surfaces with your fingers. Use only Levenhuk-approved cleaning cloths and tools for external surfaces. Do not use corrosive agents or acetone-based cleaners on the optical system.
• Abrasive particles, such as sand grains, should be blown off lens surfaces or removed with a soft brush.
• Do not expose the instrument to prolonged sunlight. Keep away from water and do not store in high humidity conditions.
• Use caution during observation. After use, place the dust cover on the microscope to protect it from dust and contaminants.
• If using the microscope for extended periods, store objective lenses, eyepieces, and the microscope separately.
• Store the instrument in a dry, cool place, away from dust, hazardous acids, other chemicals, heaters, open flames, and other high-temperature sources.
• Avoid using the microscope near flammable materials or substances (benzene, paper, cardboard, plastic, etc.), as the base may heat up during use, posing a fire risk.
• Always disconnect the microscope from the power source before opening the base or replacing the lamp. Allow the lamp to cool down before attempting replacement, regardless of its type (halogen or incandescent). Always replace lamps with the same type.
• Ensure the power supply matches the voltage specified in the technical data. Connecting to a power outlet with a different voltage may damage the instrument's electrical circuits, burn out the lamp, or cause a short circuit.
• If a small part or battery is ingested, seek immediate medical assistance.

Battery Safety Instructions

• Use batteries of the correct type and size.
• Replace all batteries simultaneously. Do not mix old and new batteries or batteries of different types.
• Clean battery contacts and device contacts before inserting batteries.
• Ensure batteries are inserted with the correct polarity (+ and −).
• Remove batteries if the equipment will not be used for an extended period.
• Remove depleted batteries immediately.
• Do not short-circuit batteries, as this can lead to high temperatures, leakage, or explosion.
• Do not attempt to reactivate batteries by heating them.
• Remember to turn off the device after use.
• Keep batteries out of reach of children to prevent ingestion, suffocation, or poisoning.