The Nikon MA200 inverted metallographic microscope is a microscope suitable for fields such as metals, materials, and electronics, providing high-precision image observation. The following is the basic operating procedure for using Nikon MA200 inverted metallographic microscope:
1. Preparation work
Inspect the microscope: Ensure that all components of the microscope, such as the objective lens, lens, light source, etc., are intact and undamaged. Check if the microscope platform is clean and ensure that there are no foreign objects on the sample stage.
Connect power supply: Ensure that the microscope power supply is connected properly and the device is turned off to prevent accidental operation.
Clean the lens and objective lens: Use professional microscope lens paper or cloth to clean the objective lens and avoid stains that may affect the observation effect.
2. Install samples
Prepare the sample: Prepare the metallographic sample to be observed, ensuring that the sample has been cut, polished, corroded, and other steps completed.
Place the sample: Place the sample on the sample stage of the microscope. If using a slide, it is necessary to ensure that the sample is firmly placed in the center of the slide.
Adjust the sample stage: Use the adjustment knob of the microscope to position the sample stage appropriately, ensuring that the sample can approach the objective lens.
3. Adjust the light source
Open the microscope: Press the power button on the microscope to turn it on.
Adjust light source intensity: Adjust the brightness of the light source as needed. Usually, a transmissive light source (reflective light source is suitable for reflective microscopes) is used to illuminate the sample. You can increase or decrease the intensity of the light source by rotating the brightness adjustment knob.
Adjust aperture: Adjust the aperture size as needed to control the brightness and uniformity of the incident light.
4. Coarse and fine tuning focus
Coarse focusing: Use the coarse focusing knob (usually a larger knob) to gradually lower the objective lens until the surface of the sample is observed.
Fine tuning focus: When the sample is close to clarity, use the fine tuning focus knob (smaller knob) to further precisely adjust the focal length until the surface of the sample is clear and visible.
5. Choose the appropriate objective lens
Objective lens selection: Choose the appropriate magnification for observation. The Nikon MA200 inverted metallographic microscope is generally equipped with multiple objectives (such as 4x, 10x, 40x, 100x oil mirrors, etc.). Usually, observe from a low magnification objective (such as 4x or 10x) and gradually switch to a higher magnification objective.
Adjust magnification: Rotate the objective lens dial to select the desired magnification. Ensure that the objective lens rotates smoothly and does not collide with the sample.
6. Observe the sample
Observation image: Observe the sample through a microscope eyepiece. Adjust the pupil distance of the eyepiece as needed to make the image clearer.
Use a digital camera (if necessary): If equipped with a digital camera, images or videos can be captured through a digital imaging device connected to a microscope for further analysis.
7. Adjust contrast and clarity
Adjust contrast: Use aperture adjustment or contrast adjuster to change the contrast of the sample and obtain clear images.
Check the status of the sample: If necessary, adjust the tilt of the sample stage to view the sample structure in different directions.
8. Shooting and Recording
Capture images: If photography or video recording is required, use the digital imaging system of a microscope to capture images. Choose the appropriate resolution and image format.
Record observation results: Relevant software or manual recording of observed metallographic features such as grains, interfaces, phase precipitation, etc. can be used.
9. Turn off the microscope
Turn off the light source: Lower or turn off the light source to avoid prolonged use.
Clean the sample table: Remove the sample and clean the sample table.
Turn off the microscope: Press the power button to turn off the microscope. Clean the lens and other contact parts.
10. Maintenance and upkeep
Regular cleaning: Regularly clean the objective lens, eyepiece, and optical system of the microscope using specialized cleaning tools.
Avoid collision: Avoid collision between the objective lens and the sample stage to prevent damage to the microscope components.
Storage: After use, cover with a dust cover and store the microscope in a dry and suitable temperature environment, avoiding prolonged direct sunlight.
Notes:
The matching between the brightness of the light source and the objective lens: High magnification objectives (such as 100 x oil lenses) require higher light intensity, so it is important to ensure that the light source is bright enough during use.
Oil Mirror Usage: When using a 100x oil mirror, it is necessary to drip an appropriate amount of oil (such as mineral oil or specialized immersion oil) between the objective lens and the sample to improve imaging clarity. Clean the oil mirror promptly after use.
By following the above steps, the Nikon MA200 inverted metallographic microscope can be operated smoothly for sample observation.