After the malfunction of the magnetic stirrer, it is necessary to maintain and repair it in a timely manner. Below are the website contents included in the maintenance of magnetic stirrers in daily use. The magnetic stirrer utilizes the repulsive property of magnetic materials, and continuously changes the polarity of the two ends of the base to drive the magnetic stirrer to rotate. The rotation of the magnetic stirrer drives the sample to rotate, resulting in uniform mixing of the sample!

1. Listen to the sound of the gearbox and motor to see if it is normal, and touch the driving temperature of various parts such as the gearbox, motor, machine base bearings, etc.: the general temperature is ≤ 40 ℃, and the high temperature is ≤ 60 ℃ (it is normal to stay on the back of the hand for more than 8 seconds)

2. Regularly check the gearbox for oil leakage, whether the shaft seal is intact, whether the oil pump is filled with oil, check the oil level and quality changes in the gearbox, whether there is a shortage of oil in the sealing oil box of the kettle machine, and if necessary, add or update the corresponding oil;

3. Check whether the safety valve (function: control pressure not to exceed the specified value), explosion-proof membrane, pressure gauge, thermometer and other safety devices are accurate, sensitive and easy to use. Check whether the safety valve and pressure gauge have been calibrated and sealed with lead (appearance: blue silver white), whether the red line of the pressure gauge is drawn correctly, and whether the explosion-proof membrane is leaking internally;

4. Regularly listen for any abnormal vibrations and sounds inside the magnetic stirrer;

5. Keep the mixing shaft clean and visible. For the shaft connected by the round nut, inspect whether the rotation direction of the mixing shaft is clockwise and strictly prohibit reverse rotation;

6. Regularly inspect the mixing, snake tube and other accessories inside the pot, tighten loose bolts, and replace relevant components if necessary;

7. Check if all inlet and outlet valves of the magnetic stirrer are intact and functional. If there are any problems, they must be dealt with promptly; Check for loose bolts on the flange and base of the stainless steel mixer, and ensure that the safety cover is intact and reliable;

8. Check whether the magnetic stirrer body has cracks, deformations, bulges, perforations, corrosion, leaks, etc., whether the insulation, paint, etc. are intact, and whether there is detachment or burning;

Ensure proper equipment hygiene and guarantee no oil stains. Magnetic stirrer is a laboratory instrument used for liquid mixing, mainly for stirring or simultaneously heating and stirring low viscosity liquids or solid-liquid mixtures. The basic principle is to use the principle of magnetic repulsion and attraction of magnetic fields, and use the magnetic field to push the magnetic stirrer placed in the container to rotate in a circular motion, thereby achieving the purpose of stirring the liquid. Combined with the heating temperature control system, the sample temperature can be heated and controlled according to specific experimental requirements to maintain the temperature conditions required for the experiment and ensure that the liquid mixture meets the experimental requirements.