Common faults and troubleshooting methods of stereomicroscope
1. Focusing: Place the workbench into the mounting hole on the base. When observing transparent specimens, use a ground glass table; When observing opaque specimens, use a black and white table. Then loosen the fastening screws on the focusing slide and adjust the height of the mirror body to a working distance that is roughly the same as the magnification of the selected objective lens. After adjustment, the fastening screws must be locked tightly. When focusing, it is recommended to choose a flat object, such as a flat paper with characters printed on it, a ruler, a triangle, etc. Visual adjustment: First, adjust the visual circles on both the left and right eyepieces 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 visibility adjustment circle to adjust the specimen until the image of the specimen is clear. Then, turn the zoom handwheel to the highest magnification position to continue adjusting until the image of the specimen is clear. At this point, observe with a left eye lens tube, and if not clear, adjust the visibility circle on the left eye lens tube axially until the image of the specimen is clear.
Stereoscopic microscopes are widely used in various departments of industry, agriculture, and scientific research due to their numerous advantages. If there are some 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. Possible causes include dirt on the specimen, dirt on the surface of the eyepiece, dirt on the surface of the objective, and dirt on the surface of the workboard.
According to the actual situation, clean the dirt on the surface of the specimen, eyepiece, objective lens, and workboard to solve the problem. The possible reason for non coincidence of the two images is that the adjustment of the pupil distance is incorrect, and corrective measures can be taken to correct the pupil distance. The non coincidence of the two images may also be due to incorrect adjustment of the visual acuity, and it may be due to different magnification of the left and right eyepieces. The eyepieces can be checked and reinstalled with the same magnification. If the image is unclear, it may be due to dirt on the surface of the objective lens. Please clean the objective lens. If the image is not clear when zooming, it may be due to incorrect visual adjustment and focusing. You can adjust the visual angle and focus again. If the light bulb frequently burns out and the light flickers erratically, it may be due to the local line voltage being too high, the light bulb is about to burn out, and the wire connection is poor. Please carefully check the voltage and microscope wire connection for firmness. If not, it may be because the light bulb is about to burn out and can be replaced to solve the problem. The calibration of a stereoscopic microscope before use mainly includes several steps: focusing, diopter adjustment, pupil distance adjustment, and bulb replacement. Below are explanations for each.
2. Pupil distance adjustment: By flipping the binocular lenses, the distance between the exit pupils of the binocular lenses can be changed.
When the user observes that the two circular fields of view completely coincide, it indicates that the pupil distance has been adjusted. It should be noted that due to individual differences in visual acuity and eye adjustment, different users or even the same user should adjust their focus separately when using the same stereoscopic microscope at different times in order to achieve better observation results. Whether replacing the upper light bulb or the lower light bulb, be sure to turn off the power switch and unplug the power cord plug from the power socket before replacing.
When replacing the upper light source bulb, first unscrew the knurled screw of the upper light source light box, remove the light box, and then remove the bad bulb from the lamp holder. Replace the good bulb, and then install the light box and knurled screw. When replacing the light source bulb, it is necessary to remove the ground glass or black and white table from the base, and then remove the faulty bulb from the lamp holder and replace it with a good one; Then install the ground glass or black and white tabletop. When replacing a light bulb, please wipe the bulb glass shell clean with a clean soft cloth or cotton yarn to ensure the lighting effect.
