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How To Use Thermal Shock Test Chamber Correctly

Sep. 21, 2018

For the Three Zone Thermal Shock Test Chamber required to add the medium in the test, it should be added correctly according to the test requirements. For example, the water consumption of the damp heat test chamber is required. The water resistivity of the test chamber shall not be less than 500 ohms. The general tap water resistivity is 10-100 ohms. The distilled water resistivity is 100-10000 ohms. Deionized water. The resistivity is 10,000-100,000 ohms. Therefore, the damp heat test water should be distilled or deionized water, and it must be fresh. Because the water is in contact with air, it is easily contaminated by carbon dioxide and dust. The water has a variety of substances. Nature, after a long time, the resistivity will decrease. There is now a pure water on the market that is economical and convenient, and its electrical resistivity is equivalent to distilled water.

Use of a Two Zone Thermal Shock Test Chamber. Wet ball gauze (wet ball paper) in damp heat test chamber has certain requirements, not any gauze can be substituted, because the relative humidity reading is the difference between the temperature and humidity, which is strictly related to the atmospheric pressure and wind speed at that time. The wet bulb temperature indication is related to the amount of water inhaled by the gauze and the surface evaporation. These are directly related to the quality of the gauze, so the meteorological regulations stipulate that the wet ball gauze must be a special "wet ball gauze" woven into linen. Otherwise it is difficult to ensure the correctness of the wet bulb thermometer, that is, the correct humidity. In addition, the placement of the wet ball gauze is also clearly defined. The length of the gauze is 100mm, the sensor probe is tightly wound, the probe is 25-30mm away from the humidity cup, and the gauze is immersed in the cup to ensure the correctness of the device control and the correctness of the humidity.

Three Zone Thermal Shock Test Chamber