portable air purifier.Correct use and operation of constant temperature and humidity machines

　　1. Properly place the experimental sample. The position of the experimental sample should be at least 10 centimeters away from the packaging box wall. For multiple samples, they should be placed on the same plane as much as possible.

　　2. The sample should not block the air outlet and return air outlet, and a certain time interval should be reserved for temperature and humidity sensors. Ensure that the experimental temperature is correct. It can ensure the long-term normal operation of environmental experimental equipment and extend its service life.

　　When conducting environmental experiments, you must understand the skills and functions of the experiment, as well as the structure of the equipment, especially the operation and function of the controller. It is also necessary to carefully read the operation manual of the experimental equipment to avoid abnormal operation of the experimental equipment due to operational errors, which may damage the experimental samples and obtain incorrect experimental data.

　　It is necessary to choose experimental equipment reasonably. To ensure the normal operation of the experiment, a reasonable share should be maintained based on the available capacity of the experimental box. For the experiment of heating the sample, its volume should not exceed one tenth of the useful volume of the experimental chamber. For non heated test samples, their volume should not exceed one-fifth of the useful volume of the constant temperature and humidity machine.

　　5. For environmental experiments involving the required medium, it should be added correctly according to the experimental needs. For example, if there is a certain demand for water in a humid experimental chamber, the electrical resistivity should be reduced. There is a more economical and convenient purified water available in the market. Its resistivity is equivalent to the resistivity of distilled water.

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