Calibration and Operation of Stereomicroscopes
Focusing: Place the workbench into the installation hole on the base. When observing transparent specimens, use a frosted glass table; When observing opaque specimens, use a black and white tabletop. Then loosen the fastening screws on the focusing slide and adjust the height of the mirror body to achieve a working distance that is roughly consistent with the magnification of the selected objective lens. After adjustment, the fastening screws must be tightened. When focusing, it is recommended to use flat objects such as flat paper with characters printed on it, rulers, triangles, etc.
Visual adjustment: First, adjust the visual circles on the left and right eyepiece tubes to the 0 mark position. Usually, observe from the right eye tube first. Turn the zoom handwheel to the low magnification position, rotate the focusing handwheel and the visual acuity adjustment ring to adjust the specimen until the image of the specimen is clear. Then turn the zoom handwheel to the high magnification position to continue adjusting until the image of the specimen is clear. At this point, observe with the left eyepiece tube. If it is not clear, adjust the visual acuity ring on the left eyepiece tube along the axis until the image of the specimen is clear.
Pupil distance adjustment: By pulling the binocular tube, the exit pupil distance of the binocular tube can be changed. When the user observes two circular fields of view completely overlapping, it indicates that the pupillary distance has been adjusted. It should be noted that due to individual differences in vision and eye adjustment, different users or even the same user using the same microscope at different times should make separate focus adjustments to achieve the best observation results.
Light bulb replacement: Whether replacing the upper or lower light bulb, be sure to turn off the power switch and unplug the power cord plug from the power outlet before replacement. When replacing the upper light source bulb, first unscrew the rolling screw of the upper light source lightbox, remove the lightbox, then remove the faulty bulb from the lamp holder, replace it with a good bulb, and then install the lightbox and rolling screw. When replacing the light source bulb, it is necessary to remove the frosted glass plate or black and white plate from the base, then remove the broken bulb from the lamp holder and replace it with a good bulb; Simply install the frosted glass or black and white tabletop. When replacing the light bulb, please wipe the bulb glass with a clean soft cloth or cotton yarn to ensure the lighting effect.
