Common Malfunctions of Stereomicroscopes and Their Troubleshooting Methods
Stereoscopic microscopes have a wide range of applications in various sectors of industry, agriculture, and scientific research due to their numerous advantages. If there are any problems during use, they can be resolved according to the actual situation. According to actual usage, common faults include blurred field of view or dirt, which may be caused by dirt on the specimen, eyepiece surface, objective lens surface, and working plate surface.
Clean the surface of the specimen, eyepiece, objective lens, and work plate according to the actual situation to solve the problem of dirt. The possible reasons for the non coincidence of the two images are incorrect adjustment of the pupillary distance, which can be corrected by adjusting the pupillary distance. The non coincidence of the two images may also be due to incorrect adjustment of the visual acuity, which can be adjusted again. It is also possible that the magnification of the left and right eyepieces is different. Check the eyepieces and reinstall them with the same magnification. If the image is not clear, it may be due to dirt on the surface of the objective lens. Please clean the objective lens. If the image is not clear during zooming, it may be due to incorrect visual acuity adjustment and focusing. You can perform visual acuity adjustment and focusing again. If the light bulb frequently burns out and the light flashes unpredictably, it may be because the local line voltage is too high, and the light bulb is about to burn out and connected to the wire. Please carefully check whether the voltage and the wire connection of the microscope are firm. If not, it may be that the light bulb is about to burn out and can be replaced with a new one to solve the problem. The calibration of a stereo microscope before use mainly includes several steps: focusing, visual acuity adjustment, pupillary distance adjustment, and bulb replacement. Below are separate explanations.
1. 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.
