Low-speed refrigerated centrifuge use and precautions
Centrifuges are often used in physical and chemical experiments. In order to ensure smooth and safe operation of the experiment and extend the life of the equipment, the experimenter must follow the following operational procedures.
(1) Inspection of the equipment before the start of the experiment, including checking whether the bolt is loose, whether the drum is firmly connected to the main shaft, whether the brake device is complete and effective, and checking whether the power supply is reliable or not.
(2) Take two centrifuge tubes, weigh them on the balance, and adjust the amount of material in the tubes so that the weights of the two tubes together with their sleeves are equal. If there is only one material, the water can be balanced in the opposite one. Place the centrifuge tube containing the material in the metal sleeve of the centrifuge, and if necessary, pad a layer of cotton on the bottom of the tube.
(3) Place the centrifuge tube and its casing into the centrifuge moving plate in a symmetrical position, and cover the cover.
(4) Turn on the power and slowly rise to the set speed for a certain period of time.
(5) After the end of the centrifugation, the speed slowly drops to reach the speed zero. At this time, the cover can be opened by pressing the stop button.
(6) After the mobile disk automatically stops rotating, the centrifuge cover can be removed and the centrifuge tube removed. When taking out the centrifuge tube, care should be taken not to cause the precipitated material to rise due to vibration and turbidity.
(7) When using a centrifuge, if the centrifuge vibration is developed and there is noise, the internal weight is unbalanced. If a metal tone is found, it often indicates that the internal test tube is broken, and should be stopped immediately for inspection.
(8) Final inspection, cut off the power supply.