Safety and Usage Precautions for Desktop High-Speed, Large-Capacity Centrifuge Rotors:
1. Always adhere to the rotor's specified maximum operating speed. Exceeding this can lead to serious mechanical failure or safety hazards.
2. Do not run the centrifuge if the rotor is unbalanced. This can cause excessive vibration, damage the equipment, and even result in rotor failure.
3. Never operate the centrifuge at high speed without a rotor installed. This can damage the motor and other internal components.
4. Avoid touching the rotor while it is in operation. The high-speed rotation poses a risk of injury or damage to the rotor itself.
5. Handle the rotor with care during storage and use. Prevent bumps, scratches, and any physical damage that could compromise its structural integrity.
6. Regularly inspect the rotor for signs of wear, such as peeling, corrosion, deep scratches, deformation, or cracks. If any of these are found, stop using the rotor immediately and replace it if necessary.
7. When installing the rotor, clean both the rotor chamber center hole and the rotor itself with a soft, clean cloth. Apply a thin layer of lubricant before gently placing the rotor into the chamber. Secure it using the compression screw and force rod. Once properly seated, remove the force rod and do not leave it in place during operation.
8. For horizontal rotors with hoods, avoid applying heavy pressure on the hood. This can deform the damper and affect the balance of the rotor. Ensure proper alignment between the upper and lower hoods to maintain dynamic balance. Keep the inside of the hood free from foreign objects during operation.
9. When using an angle rotor, always ensure the rotor cover is tightly secured to prevent accidents.
10. To remove a horizontal rotor with a hood, first take off the upper hood, then carefully remove the centrifuge tubes. Loosen the compression screw using the force rod, and insert the T-shaped handle into the rotor’s center hole to lift it out. Only after loosening should you proceed to remove the rotor.
11. When removing an angle rotor, begin by unscrewing the rotor cover, then remove the centrifuge tube. Loosen the compression screw with the force rod, and use the T-shaped handle to lift the rotor out of the chamber.
12. Never pull the rotor forcefully when removing it. This can damage the rotor seat and affect future performance.
13. After completing the separation process, wipe the rotor and centrifuge tubes with a clean, soft cloth to remove any residual liquid. Dry them thoroughly before storing. Rotor and tubes not in use should be removed from the centrifuge chamber and stored in a clean, dry area. If the rotor is not used for an extended period, apply a thin layer of paraffin to protect it.
14. Pay attention to the sample volume in the centrifuge tubes and ensure the seals are tight. Regularly check the condition of the seal rings and replace them if they show signs of aging or damage. Leaks can occur due to overfilling, poor sealing, or damaged tubes. Always clean the rotor promptly after shutdown and apply a protective agent.
15. If the rotor has been exposed to corrosive solvents, clean it immediately after stopping the machine, dry it, and apply a protective coating.
16. When the average density of the sample exceeds 1.2 g/mL, reduce the rotor speed to ensure safe operation.
17. When using stainless steel centrifuge tubes, operate the rotor at a reduced speed to minimize stress on the rotor.
18. If the rotor has been inactive for three months or more, run it at low speed for 10 minutes before resuming full-speed operation. This helps maintain the rotor’s structural integrity and performance.
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The invention and use of stainless steel can be traced back to the First World War. At that time, the British guns on the battlefield were always transported back to the rear due to wear and tear. The military production department ordered Brearley to develop high-strength wear-resistant alloy steel, specializing in solving the wear problem of the gun chamber. Brearley and his assistants collected various types of steel and alloy steels produced at home and abroad, conducted performance experiments on various types of machinery, and then selected more suitable steels to make guns. One day, they experimented with an alloy steel containing a large amount of chromium. After the wear resistance test, they found that the alloy was not wear-resistant, indicating that it could not make guns. So they recorded the experimental results and threw it in the corner. . One day a few months later, an assistant rushed to Brearley with a piece of shiny steel and said, "Sir, this is the alloy steel sent by Mr. Mullah I found when I was cleaning the warehouse. You Do you want to experiment to see what special effect it has!" "Okay!" Brearley said happily, looking at the bright and dazzling steel.
The experimental results show that it is a stainless steel that is not afraid of acid, alkali and salt. This stainless steel was invented by Mullah in Germany in 1912. However, Mullah did not know what this stainless steel was used for.
Brierley thought to himself: "This kind of non-wear-resistant but corrosion-resistant steel can't be used to make guns. Can it be used to make tableware?" He went ahead and made a stainless steel fruit knife, fork, spoon, and fruit plate and folding knives.
The stainless steel invented by Brearley was patented in the United Kingdom in 1916 and began to be mass-produced. Since then, stainless steel accidentally discovered from garbage heaps has swept the world, and Henry Brearley is also known as the "father of stainless steel".
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