The centrifuge is one of the commonly used experimental equipment in the laboratory. The installation of the centrifuge plays a key role in the service life of the centrifuge. Today, Xiaobian gives you a summary of the installation precautions for the laboratory centrifuge.
1, correctly installed
(1) Power supply voltage: The voltage fluctuation should meet the national standard within 10%. Otherwise, some manufacturers' centrifuges cannot operate normally. If the voltage fluctuation is above this, it is recommended to use a voltage regulator to comply with this grid.
(2) The ground wire should be firmly: the wiring of the power supply of the room should meet the requirements. China's three-phase four-wire system. The three-phase is the three-phase in the industrial power. When the three-phase electricity is used, the neutral line is separated from the ground line. More importantly, whether it is three-phase industrial power or not, the general single-phase power is good, and the ground line should be reliable to avoid leakage. The ground wire cannot be connected to the hot air pipe or the water pipe.
(3) The ground should be flat and firm: for large centrifuges, the floor should be firm at the installation site to ensure the normal operation of the rotor of the centrifuge, and the ground should be flat and firm.
(4) Find a good level: find a small level with a correct level, open the lid of the centrifuge, find the level on the main shaft, and find the level by adjusting the screwing of the adjusting bolt next to the four casters, and pay attention to the fact that one of the feet cannot be lost.
2, load to find balance
In the design and manufacture of the centrifuge, the imbalance caused by the machining error of the rotor has been remedied by the dynamic balance test, but all centrifuges have the unloading amount of the sample.
In order to compete with other manufacturers in the index of the large unbalance limit of the centrifuge, the centrifuge manufacturer tries to give a larger value. At this larger value, the centrifuge can be operated, but the imbalance force generated at this time suddenly hits the bearing and the bracket at n times per minute, and the centrifuge is damaged. Therefore, users should try to find a good balance and centrifuge for those expensive centrifuges, which is good for the life of the centrifuge.
3. Clean up the water in the centrifugal chamber
When the centrifuge is running, it uses refrigeration. Because of the moisture of the air, it is frosted in the centrifugal chamber, and after the shutdown, it is frosted into water. Most foreign low-speed large-capacity centrifuges have no drainage holes, and the water in the centrifugal chamber is more and more accumulated. At this point, the user should remove the rotor and clean up the accumulated water. When reinstalling the rotor, be sure to install it to avoid accidents.
4, aluminum alloy can not be corroded
The centrifuge rotor is generally made of aluminum alloy. When it is corroded, the strength is reduced and it is easy to accident. The aluminum alloy is susceptible to liquid corrosion. After cleaning, it is blown dry with a hair dryer, or inverted for a period of time to confirm that it can be used. Some blood stations imported centrifuges, and there should be 6 plastic trays in 6 aluminum cups. The plastic tray should be placed in a blood bag to avoid direct placement in the aluminum cup. Pay attention to the test tube for cracks. If the test tube (especially the test tube used repeatedly) has cracks, it must not be used. Otherwise, the test tube rupture will cause the rotor to lose balance during the rotation, which may cause a vicious accident such as broken shaft.
5, broken shaft accident
The rotor is not placed well, or the sample imbalance is too large, and the centrifuge starts. Modern imported centrifuges have unbalanced protection, that is, when the unbalance amount exceeds a certain limit, the power should be automatically cut off to stop the centrifuge. However, under the above circumstances, it is already late, and a serious accident will occur. One of the malignant accidents is the broken shaft. Due to the sudden break of the shaft during high-speed rotation, the centrifugal rotor has no support, and the centrifugal machine is turned into a chaotic collision, which can make the centrifuge rotate the machine to a 270° angle. At this time, if there are staff or equipment next to it, it will cause casualties and damage to the equipment.
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