The circuit board constant temperature and humidity test room is a common instrument used to detect product quality in daily life. The equipment has a very important parameter during the test-relative humidity.
The so-called relative humidity is the ratio of the partial pressure of water vapor in the air and the partial pressure of saturated water vapor at the same temperature u = e / es * 100%. The water vapor partial pressure is obtained by measuring the dry bulb temperature and converting it to obtain e = etw-AP (t-tw). The basis for measuring the relative humidity using the dry and wet bulb method is the air condition. Measuring relative humidity is inaccurate and can only be used as a reference. In the case of stable air conditions, relative humidity is only affected by the value of A. A = 0.0001 (65 + 6.75 / V) Formula depends on the size of A Due to the flow velocity of the air flowing through the wet bulb, the flow velocity of the air flowing through the wet bulb is an important factor affecting the relative humidity measurement.
According to the experimental test results of the constant temperature and humidity test room of the circuit board, the appropriate relative humidity under various conditions is:
1. 40% -60% storage of candy and snacks;
2. Human activities 45% -65%;
3. The most favorable disease prevention and treatment environment 40% -55%;
4. Libraries, art galleries, museums 40% -60%;
5. Computer room, communication room 45% -60%;
6. 40% -60% storage of clothing and cotton wool textiles;
7. Milk product storage 50% -60%;
Measuring the relative humidity of the constant temperature and humidity test room of the circuit board reasonably and accurately is of great significance for ensuring the environmental conditions.
Aisi specializes in the production of circuit board constant temperature and humidity test chamber ceiling led constant temperature and humidity test chamber standard type constant temperature and humidity test chamber and other test equipment, has many years of production experience. Professional production environment testing equipment.
For more environmental testing equipment, please visit Aisili (China) Instrument Co., Ltd. Aisili looks forward to win-win cooperation with new and old customers around the world!
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