How to use Low and High Temperature Test Chamber for High Low Temperature Testing

High Low Temperature Testing Test Chamber  Intermittent Wet and Hot Test Box is a special sealed test box. The correct use of the device can not only provide accurate data for testing personnel, but also enable the High and Low Temperature Intermittent Wet and Hot Test Box to run normally for a long time and extend its service life. Therefore, it is very important to use High and Low Temperature Intermittent Wet and Hot Test Box properly.

LISUN Temperature Humidity Chamber | Thermal Chamber | Climate Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2), IEC60068-2-78, IEC60598-1, GB/T2423.17, GB/T5170.2, GB/T5170.5. The climate chamber is used to test the CFL/LED which meets IES LM-80-08, electricity products, automative cars, home appications and mobiles.

When purchasing Low and High Temperature Test Chamber and Wet and Hot Test Box for the first time, some users are not familiar with how to use it correctly due to lack of experience. Next, let’s briefly introduce it.
1. Before use: turn on the power supply and water tank to supply clean water source in advance.
1) Turn on the power supply of the Low and High Temperature Test Chamber and Wet and Hot Test Box power distribution cabinet
2) Turn on the power supply of the cooling tower of the High and Low Temperature Wet and Hot Test Box and the water supply switch
3) Turn on the “Total Power” switch of the High and Low Temperature Wet and Hot Test Box
4) Check if there is water in the water tank of the High and Low Temperature Intermittent Wet and Hot Test Box. If there is no water, add water into it.

2. During use: special attention is paid to safety issues to avoid scalding by high temperature and frostbite by low temperature.
1) When the equipment is operating high low temperature test chamber, the temperature in the test box will be very high. When opening the test box door during the test process or after the test is finished, be extra careful not to scald yourself.
2) When the test box is doing low temperature test, the temperature in the test box will be very low. Therefore, when opening the test box door during the test process or after the test is finished, be extra careful not to get frostbite.
3) Prohibit directly connecting the power supply to the equipment power supply when testing low-power products to avoid increasing the load of the power supply, and prohibit testing flammable, explosive and corrosive items.
4) Prohibit moving and repairing the equipment when powered on or running.
5) Do not touch the electrical parts while the equipment is running.

After using the Low and High Temperature Test Chamber Alternating Wet and Hot Test Box, in order to facilitate heat dissipation, it is necessary to regularly clean the condenser of the cooling machine and check the wiring terminal of the electrical control part to prevent loosening and cause a fire.

Here are some tips on how to correctly use the High and Low Temperature Alternating Wet and Hot Test Box:
1. When simulating the high low temperature test chamber, the performance of the sample and test conditions should be considered. For the test procedure and test technology, a high level of familiarity with the technical performance of the test equipment used should be obtained, and the structure of the equipment should be understood, especially the operation and performance of the control problem. Carefully read the operation manual of the test equipment to prevent the test equipment from abnormal operation due to incorrect operation and damage the test data of the test sample.

2. Select the test equipment reasonably. In order to ensure the normal progress of the test, the appropriate test equipment should be selected according to the different conditions of the test sample. There should also be a reasonable ratio between the effective volume of the test sample and the high low temperature test chamber. For test samples with heat test, its volume should not exceed one tenth of the effective volume of the test chamber. For non-thermal test samples, its volume should not exceed one fifth of the effective volume of the test chamber. For example, a 21-inch color TV can select a cubic volume test chamber to meet the requirements for temperature signal test, but it cannot meet the requirements for power-on. A larger high temperature oven should be replaced because the TV will dissipate heat when it works.

3. Place low and high temperature test sample correctly. The placement of the test sample should be 10 cm or more away from the low temperature alternating wet and hot test box wall, and multiple samples should be placed on the same plane as much as possible. The samples should not be placed near the outcoming air port and the return air port, and the temperature and humidity sensor should be correctly inclined.

4. According to low and high temperature test requirements, the correct addition of media in the environment test should be added. If a certain requirement is made for the use of water, the water resistance of the test box should not be less than 5000m. Generally, the water resistance of tap water is 10-1000m, the water resistance of distilled water is 100-100,000m, and the water resistance of deionized water is exactly 10,000-10,000m. Therefore, tap water or deionized water should be used for the warm test, and fresh water must be used. Since the water is easily contaminated by carbon dioxide and dust after contact with gas, the water has the properties of dissolving a variety of substances. Over time, the resistivity should be lowered. There is currently a kind of pure water on the market, which is equivalent to distilled water and is convenient for its resistivity.

5. There are also certain requirements for the use of wet ball gauze (wet ball paper) in the low and high temperature alternating wet and hot test box, and not any gauze can be used instead. Because the reading of the relative temperature is the strontium and temperature difference, strictly speaking, it is also the atmospheric pressure at the time and place. Wind speed is related to the temperature value of the wet ball and the water absorbed by the fried cloth and the surface feeling, which is directly related to the quality of the gauze. Therefore, the climate regulation of the temperature ball gauze must be the special “temperature ball gauze” of linen, otherwise, it is difficult to ensure the accuracy of the wet ball thermometer, that is, the accuracy of the temperature. In addition, there is also a clear stipulation for the placement of temperature ball gauze. Gauze length: 100mm, tight spiral sensor probe high temperature cup 25-30mm, in order to ensure the correctness of the equipment control and the accuracy of the temperature, the gauze should enter the cup.

All in all, safety is ensured when people receive protection from harm in the process of production and life, so strict operation methods should be followed when using the high low temperature test chamber. After understanding the operation, operators will master the operation method of the High and Low Temperature Alternating Wet and Hot Test Box, which can protect the equipment and prolong its service life.LISUN has developed High and Low Temperature Alternating Wet and Hot Test Equipment according to user needs. This equipment is used to test the adaptability of products under different environmental test conditions such as high temperature and low humidity, low temperature and high humidity.

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