People's mastery of science and technology is also expanding over time, research and development of a use of magnetic power to start the transportation, that is, the magnetic levitation car, this car to a certain extent can be more rapid travel, of course, in other aspects of the study of magnetism, for example, to say that today's magnetic stirrer, which is made by the Shanghai Eagle Dee Instrument Co. Problems when the magnetic stirrer does not turn, what is the cause of it?
What is a magnetic stirrer?
A magnetic stirrer is used for heating or heating and stirring at the same time, for liquids or solid-liquid mixtures that are not very viscous. The principle of magnetic field and vortex is utilized after putting the liquid into the container? Put the stirrer into the liquid at the same time when the base generates a magnetic field. Drive the stirrer into a circular movement to achieve the purpose of stirring the liquid. With the temperature control device, you can control and maintain the sample temperature according to the specific experimental requirements, to help the experimenter set the experimental conditions, which greatly improves the possibility of experimental repeatability. Widely used in large and medium-sized colleges and universities, environmental protection, scientific research, health, epidemic prevention, petroleum, metallurgy, chemical industry, medical and other units, this instrument has good performance, no noise, no vibration, stirring effect is remarkable, is the laboratory laboratory laboratory personnel ideal tool.
What causes the magnetic stirrer not to turn?
One, when the magnetic stirrer turns and does not turn, it may be that the contact of the transformer for speed regulation is not very good.
Two, the vacuum degree is not stable, may be the whole vacuum system has a leakage point.
Three, the power supply is not necessarily electric.
Four, the fuse on the unit may have blown.
Fifth, look to see if it can be heated, if it can be heated but not stirred, it means there is a problem with the motor.
Principle and function of the magnetic stirrer:
Utilizing the characteristics of the magnetic material of homogeneous repulsion , by constantly changing the polarity of the ends of the base to promote the magnetic stirrer to rotate, through the magnetic stirrer rotating
The sample is heated by the temperature control board at the bottom, and the sample is heated uniformly by the rotation of the magnetic stirrer to reach the specified temperature;
The heating power is adjusted to make the heating speed controllable, which is applicable to a wider range of sample treatment processes.
The general magnetic stirrer has both stirring and heating functions.
Specifically:
The first role, so that the reactants are mixed evenly, so that the temperature is uniform;
The second role, to speed up the reaction speed, or evaporation speed, shorten the time.
In the use of magnetic stirrer, first of all, check the equipment is not complete, after checking the middle of the beaker, and then add the liquid; the instrument's power supply is plugged in, turn on the switch, adjust the speed, can not be adjusted to high-grade at once, or it is very easy to break the machine, according to the needs of their own manual adjustment of whether to heat, as well as the temperature of the heating. In the use of magnetic stirrer, the machine working time can not be very long, otherwise it will reduce the life of the machine, in the electricity must be grounded to avoid danger.