General Information; Lcd Screen - Levenhuk D80L Guía De Usuario

Levenhuk D80L LCD, D90L LCD Digital Microscopes

General Information

Read the user manual carefully before you start working with a microscope. Levenhuk D80L LCD and D90L LCD biological
microscopes are safe for health, life and property of the consumer and the environment when properly used, and meets the
requirements of international standards. These microscopes are designed for observing transparent objects in the transmitted
light using the bright field method. The Levenhuk D80L LCD model is also suitable for conducting research in reflected light using
the bright field method.
They perform well in clinical research and tests; teaching demonstrations; bacterioscopy and cytology in medical and health
establishments, laboratories, universities; and may be used for scientific research in agriculture and microbiology.
Microscope assembly
• Unpack the microscope carefully and place it on a flat surface.
• Remove the plastic bags and dustproof cover of the eyepiece head.
• Install the LCD screen and tighten the locking screw.
• Inspect all the items included in the kit and define their purpose.
• D90L LCD: Connect the power cord to the microscope and plug it in.
• D80L LCD: Open the battery compartment, position the batteries according to the polarity marking on the battery
compartment, reinsert the battery compartment door and turn on the microscope. Connect the microscope to the mains
using the power adapter.
Use
Please refer to the fig. 1а (Levenhuk D80L LCD) and fig. 1b (Levenhuk D90L LCD).
• Turn on the power and the illumination will turn on. Set the brightness at approximately 70%. Place the specimen on the
stage. Make sure the clips hold the specimen firmly in place.
• D80L LCD: Adjust the height of the stage by rotating the locking screw.
• D90L LCD: Iris diaphragm should be adjusted in accordance with numerical aperture of a lens. The best practice is to
make the iris diaphragm slightly smaller than the aperture of the selected lens. Open or close the iris diaphragm using the
adjustment screws. If the adjustment screw is turned to the right, the iris diaphragm is fully open. Note: the diaphragm is
not intended for adjusting the brightness of the illumination. To adjust the brightness, use the brightness adjustment knob.
• D90L LCD: Slide the filter holder, place the filter in it and then return the holder to its initial position.
• D80L LCD: 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.
• To change the objective magnification, turn the revolving nosepiece until it clicks.
• Make sure that the lens does not touch the sample when adjusting the focus: rotate the coarse focus knob until the
specimen is about 3.175mm (1/8") away from the lens.
• Turn the fine focusing knob to make the image clear. The fine focusing mechanism allows you to focus on the observed
specimen while using high magnifications.
• D90L LCD: When you use an oil immersion objective, the space between the specimen and the lens should be filled with
immersion oil. Raise the condenser to the upper position and put a drop of oil on the lens and on the cover glass of the
specimen. Move the revolving nosepiece back and forth to get rid of air bubbles in the oil. Then, fix the objective lens in its
working position. Make sure that oil fills the entire space between the objective lens and the specimen. After use, wipe the
lens dry.
• To adjust the position of the mechanical scale (D90L LCD only), turn the coarse focusing knob in a clockwise direction if you
want to fix the position of the mechanical scale, or in a counterclockwise direction if you want to loosen it.
• D90L LCD: To place the specimen in the field of view, move the stage horizontally back and forth or left and right using the
stage moving knob.
• While looking at the monitor, use the focusing knobs to adjust the sharpness of the image.

LCD screen

Levenhuk D80L LCD and D90L LCD comes with an LCD screen (fig. 2). Connect the power cable to the power connector on the
LCD screen and connect it to the network. Insert the SD card (included) in the SD slot to view the image and save the resulting
photos and videos. Then, turn on the LCD screen with the power on/off button by pressing and holding it for 3 seconds.
Digital magnification
During observations, press the "UP" button to enlarge the image and the "DOWN" button to reduce the image.
Photo
Press the "Capture" button on the control panel to take a photo.
Video
1. Press the "Video" button to enter the video recording mode.
2. Press the "Capture" button to start recording a video.
3. Press the "Capture" button again to stop recording a video.
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