RBB-A-01:
1. The optical system designed by senior optical engineers not only provides clear images but also can be used as a simple microscope. It features adjustable brightness, comfortable vision, and is not prone to causing fatigue even after long-term operation.
2. It is equipped with three testing methods: Brinell, Rockwell, and Vickers, and seven levels of test force, which can meet various hardness testing requirements.
3. The casting shell is formed in one piece, ensuring stable structure without deformation. It is coated with pure white automotive paint, which is of high grade and has strong scratch resistance. It remains as bright as new even after years of use.

RBB-A-02:
1. The 7-inch LCD touch screen can directly display hardness values, hardness conversions, testing methods, test force, brightness, holding time, measurement times, statistical data, and dwell time, making the testing process clear and intuitive.
2. The system comes with a built-in calibration function, allowing manual adjustment of input error calibration instruments.
3. When testing curved surfaces, it automatically corrects according to the standard curved surface radius.
4. The adjustable range of the optical system's brightness is 0-100.
5. It can store 100 sets of test data, allowing for viewing at any time, as well as deletion of current data or clearing all test data.
6. The test force unit can be manually selected and converted, with conversion units being: (kgf, N).
7. It is equipped with three testing methods: Brinell, Rockwell, and Vickers, and seven levels of test force, which can meet various hardness testing requirements.

Precautions:
1. Installation requirements: Place on a stable and level workbench, and ensure good grounding.
2. Check the instrument: Confirm that all components are normal and electrical components are firmly fixed.
3. Sample requirements: The sample surface should be flat and smooth, with sufficient thickness. For cylindrical samples, a "V" shaped sample stage should be used.
4. Select parameters during the testing process: Choose appropriate load, dwell time, and other parameters based on the hardness range of the material.
5. Install the indenter: Ensure good contact between the indenter and the sample, and apply moderate pressure. Operating norms: Handle with care, and avoid rotating relevant handwheels when applying or releasing the test force.
6. Maintenance and cleaning after use: Regularly clean dust, cover with a dust cover after use, and apply anti-rust oil to the hardness blocks and indenters after use.
7. Regular calibration: Use standard hardness blocks for calibration to ensure measurement accuracy.
8. Safety precautions: Wear protective gear during operation to prevent electric shock, burns, and other accidents.