Brief Instructions on Operation and Precautions of Metallographic Microscopes
① Connect the light source plug of the metallographic microscope to a low-voltage transformer (6V~8V), then switch on the power supply.
② Select the objective lens and eyepiece according to the required magnification, install them respectively on the objective turret and eyepiece tube. Rotate the objective turret to move the objective lens into the light path until you hear a click indicating it is in place.
③ Place the specimen on the stage and secure it with spring clips while observing from below.
④ Turn the coarse focusing knob to raise the tube first, so that the objective lens can get as close to the specimen surface as possible (without contact). Then turn the coarse knob in the opposite direction to slowly lower the tube for rough focusing. When the field of view brightens, switch to the fine focusing knob and adjust until the image is clear.
⑤ Appropriately adjust the aperture diaphragm and field diaphragm to obtain a high-quality image.
⑥ If using an oil immersion objective lens, place a drop of cedar oil on the front lens of the objective, or directly apply cedar oil onto the specimen. After use, immediately wipe the oil off with cotton dipped in xylene, then dry with lens tissue.
Precautions for Metallographic Microscope
① Operate carefully. Avoid rough or violent movements. Do not disassemble any microscope components without authorization.
② Do not touch the microscope lenses or specimen surface with bare hands. If dust falls on the lens, gently wipe it with lens brush or lens paper.
③ The microscope illumination bulb must be connected to a 6~8V transformer. Never plug it directly into a 220V power supply, or the bulb will burn out.
④ Rotate the coarse and fine adjustment knobs slowly. Stop operation and report immediately if you feel resistance. Do not force the knobs to avoid equipment damage.
