Troubleshooting common problems of biological microscope
1. Shade positioning failure: this may be too loose shade fixing screws, positioning marbles escape from the positioning hole caused. As long as the marbles back to the positioning hole, tighten the fixing screws on the line. If tightened, the visor rotation difficulties, the need to add a washer between the visor and the carrier platform. The thickness of the washer to tighten the screw, the visor rotation is easy, the positioning of the marbles do not escape, the visor positioning is correct for the best.
2, the objective lens converter rotation difficulties or positioning failure: converter rotation difficulties may be fixed screws are too tight. Make turning difficult, and will damage the parts. Too loose, the bearing inside the marbles will be out of orbit, crowded together, the same rotation difficulties; in addition, the marbles are likely to run to the outside, the diameter of the marbles is only one millimetre, it is easy to lose. Fixed screws to the degree of tightness in the converter in the rotation of the ease of vertical direction, there is no loose gap shall prevail. After adjusting the fixing screws, the locking screws should be tightened immediately. Otherwise, after the converter is rotated, the problem will occur again.
Converter positioning failure may sometimes be positioning ** broken or elastic deformation caused. Generally just replace the ** on the line.
3. eyepieces, objective lenses are contaminated or mould: most microscopes after a period of time will produce the outside of the lens is stained or mould. Especially the high-magnification objective lens 40X, in doing the 'observation of plant cell wall separation and recovery' experiment, very easy to be contaminated by sugar. If the lens is contaminated and not cleaned in time, mould will occur. The way to deal with the first clean and soft silk cloth dipped in warm water to clean off the sugar and other pollutants, and then dry silk cloth, and then use long-fibre cotton wool dipped in some of the lens cleaning solution cleaning, * and then blow dry with a blowing ball. It should be noted that the cleaning solution must not penetrate into the internal objective lens. In order to achieve the required magnification, the lenses of the high-magnification objective lens need to be tightly glued together. The glue is transparent and very violent. Once the glue is dissolved by alcohol, ether and other solvents, the light path will change when the light passes through the two lenses. The observation effect will be greatly affected. So do not let alcohol, ether and other solvents penetrate into the interior of the objective lens when cleaning.
4. Mirror frame, mirror hip tilt fixed: this is the mirror frame and the base of the connecting screws due to loosening. Available special double-ended plate hand or with a pointed pliers stuck in the two eyelets of the double-eyed nut can be tightened. If the problem is not solved after tightening, it is necessary to add appropriate gaskets in the nut to solve the problem.
If the eyepiece, objective lens lens inside the lens is contaminated or mould, it must be disassembled to clean. Eyepiece can be directly unscrewed and removed for cleaning. But the structure of the objective lens is more complex, the stacking of lenses, the distance between the lenses have very strict requirements, the precision is also very high. Manufacturers in the assembly is after ** calibration and positioning. Therefore, after disassembling and cleaning, it must be assembled strictly as it is.
