Original source: Factors affecting the uniformity of large-scale constant temperature and humidity test chambers Edit: Lin frequency instrument
The large-scale constant temperature and humidity test chamber has the function of cooling and heating, and belongs to the high-end test instrument. When the test box is tested, if the temperature uniformity exceeds the allowable deviation range, the data obtained from the test will not be reliable. So what are the factors that affect the temperature uniformity of this test chamber? The following small series tells everyone:
First, because the inner wall structure of the large-scale constant temperature and humidity test chamber is different, the inner wall temperature can not be uniform, which affects the convection in the working chamber, resulting in deviation of temperature uniformity.
Second, there are six faces on the inner wall of the studio, and the heat transfer system is different. Some have threading holes and inspection holes. The local heat dissipation and heat transfer phenomenon are caused, resulting in uneven temperature of the test chamber.
Third, the sealing of the test box and the door is not good, for example, the gap of the sealing strip and the leakage of the door. It will affect the temperature uniformity in the working room.
4. If the sample volume is too large, or if the test sample is placed in the working chamber improperly, resulting in internal air convection being impeded, a large temperature uniformity deviation will also occur.
5. Placement of test samples in the working chamber of a large-scale constant temperature and humidity test chamber: If a test sample affecting heat convection is placed in the working chamber, it will inevitably affect a certain degree of temperature uniformity.
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