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How to use the centrifuge safely 1.
Installation (1) Power supply voltage: The voltage fluctuation must meet the standard within + 10%, otherwise the centrifuges of some manufacturers cannot operate normally
.
If the voltage fluctuates above this, a voltage stabilizer is recommended for compliance with this grid
.
(2) The ground wire should be firm: the wiring of the power supply in the room should meet the requirements
.
China is a three-phase four-wire system
.
Three-phase is the three-phase in industrial power.
When using three-phase power, the neutral wire is separated from the ground wire.
The important thing is that whether it is three-phase industrial power or ordinary single-phase power, the ground wire should be reliable to avoid leakage.
The ground wire cannot be connected to the heating pipe or the water pipe
.
(3) The ground should be flat and firm: For large centrifuges, the floor should be firmly moved at the installation site to ensure that the rotor of the centrifuge works normally and does not sink in.
The ground at the installation and fixing place should be flat and firm
.
(4) Find the level: Find a small spirit level that is more accurate, open the centrifuge cover, find the level on the main shaft, and find the level by adjusting the screwing of the adjusting bolts next to the four casters, and pay attention that one foot cannot be missed
.
2.
Loading samples and finding balance During the design and manufacture of the centrifuge, the unbalance caused by the machining error of the rotor has been remedied by the dynamic balance test, but all centrifuges have their allowable sample loading unbalance
.
In order to compete with other manufacturers in the index of the maximum unbalance limit allowed by the centrifuge, the centrifuge manufacturer tries to give a larger value
.
At this larger value, the centrifuge can run, but the unbalanced force generated at this time suddenly impacts the bearing and the bracket at a frequency of n times per minute, and the centrifuge is damaged
.
Therefore, for those expensive centrifuges, users should try to find the balance after centrifugation, which is good for the life of the centrifuge
.
3.
Clean up the accumulated water in the centrifugal chamber.
When some centrifuges with refrigeration function are running, due to the moisture in the air, frost will form in the centrifugal chamber, and the frost will turn into water after shutdown
.
Most low-speed large-capacity centrifuges do not have drain holes, and the water in the centrifuge chamber accumulates more and more
.
At this time, the user should remove the rotor by himself and clean up the accumulated water
.
When reinstalling the rotor, be sure to install it well to avoid accidents
.
4.
Aluminum alloys cannot be corroded Centrifuge rotors are generally made of aluminum alloys.
When corroded, the strength is reduced and accidents are prone to occur
.
Aluminum alloy is easily corroded by liquid.
After cleaning, it should be dried with a hair dryer, or inverted for a period of time, and it can be used after confirming that it is dry
.
Some blood banks import centrifuges, but there are no 6 plastic trays that should be in 6 aluminum cups
.
Bloodletting bags should be placed in plastic trays, and avoid placing them directly in aluminum cups
.
Note that the test tube has no cracks
.
If the test tube (especially the test tube used repeatedly) has cracks, it must not be used.
Otherwise, the rupture of the test tube during use will cause the rotor to lose its balance during rotation, which may lead to vicious accidents such as broken shafts
.
5.
The rotor is not placed properly in the event of broken shaft, or the unbalanced amount of the loaded sample is too large, and the centrifuge starts
.
Although modern imported centrifuges have unbalance protection, that is, when the unbalance amount exceeds a certain limit, the power should be automatically cut off to stop the centrifuge
.
But in the above case, it is too late and a vicious accident will occur
.
One of the vicious accidents is the broken shaft.
Due to the sudden shaft breakage during high-speed rotation, the centrifugal rotor has no support and turns around in the centrifugal chamber.
At this time, if there are people or equipment nearby, it will cause casualties and damage to the equipment.
.
Installation (1) Power supply voltage: The voltage fluctuation must meet the standard within + 10%, otherwise the centrifuges of some manufacturers cannot operate normally
.
If the voltage fluctuates above this, a voltage stabilizer is recommended for compliance with this grid
.
(2) The ground wire should be firm: the wiring of the power supply in the room should meet the requirements
.
China is a three-phase four-wire system
.
Three-phase is the three-phase in industrial power.
When using three-phase power, the neutral wire is separated from the ground wire.
The important thing is that whether it is three-phase industrial power or ordinary single-phase power, the ground wire should be reliable to avoid leakage.
The ground wire cannot be connected to the heating pipe or the water pipe
.
(3) The ground should be flat and firm: For large centrifuges, the floor should be firmly moved at the installation site to ensure that the rotor of the centrifuge works normally and does not sink in.
The ground at the installation and fixing place should be flat and firm
.
(4) Find the level: Find a small spirit level that is more accurate, open the centrifuge cover, find the level on the main shaft, and find the level by adjusting the screwing of the adjusting bolts next to the four casters, and pay attention that one foot cannot be missed
.
2.
Loading samples and finding balance During the design and manufacture of the centrifuge, the unbalance caused by the machining error of the rotor has been remedied by the dynamic balance test, but all centrifuges have their allowable sample loading unbalance
.
In order to compete with other manufacturers in the index of the maximum unbalance limit allowed by the centrifuge, the centrifuge manufacturer tries to give a larger value
.
At this larger value, the centrifuge can run, but the unbalanced force generated at this time suddenly impacts the bearing and the bracket at a frequency of n times per minute, and the centrifuge is damaged
.
Therefore, for those expensive centrifuges, users should try to find the balance after centrifugation, which is good for the life of the centrifuge
.
3.
Clean up the accumulated water in the centrifugal chamber.
When some centrifuges with refrigeration function are running, due to the moisture in the air, frost will form in the centrifugal chamber, and the frost will turn into water after shutdown
.
Most low-speed large-capacity centrifuges do not have drain holes, and the water in the centrifuge chamber accumulates more and more
.
At this time, the user should remove the rotor by himself and clean up the accumulated water
.
When reinstalling the rotor, be sure to install it well to avoid accidents
.
4.
Aluminum alloys cannot be corroded Centrifuge rotors are generally made of aluminum alloys.
When corroded, the strength is reduced and accidents are prone to occur
.
Aluminum alloy is easily corroded by liquid.
After cleaning, it should be dried with a hair dryer, or inverted for a period of time, and it can be used after confirming that it is dry
.
Some blood banks import centrifuges, but there are no 6 plastic trays that should be in 6 aluminum cups
.
Bloodletting bags should be placed in plastic trays, and avoid placing them directly in aluminum cups
.
Note that the test tube has no cracks
.
If the test tube (especially the test tube used repeatedly) has cracks, it must not be used.
Otherwise, the rupture of the test tube during use will cause the rotor to lose its balance during rotation, which may lead to vicious accidents such as broken shafts
.
5.
The rotor is not placed properly in the event of broken shaft, or the unbalanced amount of the loaded sample is too large, and the centrifuge starts
.
Although modern imported centrifuges have unbalance protection, that is, when the unbalance amount exceeds a certain limit, the power should be automatically cut off to stop the centrifuge
.
But in the above case, it is too late and a vicious accident will occur
.
One of the vicious accidents is the broken shaft.
Due to the sudden shaft breakage during high-speed rotation, the centrifugal rotor has no support and turns around in the centrifugal chamber.
At this time, if there are people or equipment nearby, it will cause casualties and damage to the equipment.
.
