Before using the constant temperature and humidity chamber, we must first be familiar with the operation procedure of the test box, and the structure of the test box and the function of the controller should be understood. At the same time, it is necessary to familiarize with the sample performance, test conditions, test procedures and test techniques of the required test, and also carefully read the operation manual of the constant temperature and humidity chamber to avoid the abnormal operation of the test chamber caused by the operation error and cause the test sample. The damage is not correct for the test data.

Secondly, it is necessary to select the working chamber size of the constant temperature and humidity chamber according to the test sample. In order to ensure the accuracy of the test results, the appropriate constant temperature and humidity chamber should be selected according to the size of the test sample. The volume of the tested product should not exceed 20% of the effective working space of the test chamber according to the selection criteria of the environmental test chamber. It is recommended to use no more than 10% for products that generate heat during the test.

Third, place the test sample correctly. The position of the test sample should be more than 10cm away from the wall of the box, and multiple samples should be placed on the same plane as much as possible. The sample should be placed without blocking the air outlet and the return air outlet. The temperature and humidity sensor should also be set a certain distance to ensure the correctness of the test temperature.

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