Standard Operating Procedures for the Use, Maintenance, and Cleaning of Experimental Centrifuges
objective
Establish a standard operating procedure for the use, maintenance, and cleaning of centrifuges, to standardize the operating process.
responsibility
The quality department QC is responsible for drafting this document, and the quality department and QC inspection personnel are responsible for the implementation of this standard.
Scope of Application: This standard is applicable to the use, maintenance, and cleaning of centrifuges.
content
4.1 The first step in using the centrifuge is to understand its working principle and the equipment required for the experiment.
4.1.1 Place the centrifuge tube containing materials inside the metal sleeve of the centrifuge. If necessary, place a layer of cotton on the bottom of the tube and weigh it on a balance. Adjust the amount of material inside the tube to make the weight of the two tubes and their sleeves equal. If there is only one tube of material, it can be balanced by holding clean water in one tube.
4.1.2 Place the centrifuge tube and its sleeve in a symmetrical position into the centrifuge moving plate and cover it properly.
4.1.3 Turn on the power, slowly move the pointer of the speed regulator to the required speed scale, and maintain it for a certain time (about 5 minutes)
After reaching a certain time, slowly turn the pointer of the speed regulator to zero. Then turn off the switch.
4.1.5 After the moving disc automatically stops rotating, the centrifuge cover can be opened and the centrifuge tube can be taken out. When taking out the centrifuge tube, care should be taken to prevent the precipitated substance from shaking and rising, resulting in turbidity.
4.1.6 When using a centrifuge, if vibration and noise are found, the internal weight imbalance will be displayed. If metal noise is found, it often indicates that the internal test tube is broken, and it should be immediately stopped and inspected.
After 4.1.7, conduct all inspections and cut off the power supply
4.2 Maintenance and upkeep
4.2.1 The centrifuge should be placed on a stable table to prevent slipping or vibration in the event of accidents.
4.2.2 When starting the centrifuge, it should be gradually accelerated. When abnormal sound is found, it should be stopped for inspection, and faults (such as asymmetry, unequal quality, uneven position of the centrifuge, or loose nuts) should be eliminated before starting work.
4.2.3 Centrifuge tubes should be placed symmetrically. If the tubes are singular and asymmetric, an additional empty tube should be added to place water of the same mass, and the mass should be adjusted to be symmetrical.
4.2.4 The centrifuge casing shall be kept clean, and the bottom of the casing shall be padded with foam plastic and other soft materials to prevent the centrifuge tube from breaking.
4.3 Cleaning
4.3.1 After each use, clean and hang signs immediately, and fill in the instrument usage record.
4.3.2 Use a soft cloth to wipe the surface of the box with stains and dirt. Visually, there is no residue of cleaning agent, and use a cleaning cloth to wipe it dry.
4.3.3 Effect evaluation: The internal and external surfaces of the equipment should be bright and tidy, without stains.
