According to the different experimental methods, the high and low temperature impact test box can be divided into two box type and three box type. As the name implies, two boxes have two laboratories, and three boxes have three laboratories. The two-box type is divided into a high greenhouse and a low-temperature greenhouse. The motor drives the basket movement to achieve high and low temperature switching. The product is placed in the basket and moves with the basket; the three-box type is divided into a cold storage room, a heat storage room and a test In the laboratory, the product is placed in the laboratory during testing.
Impact temperature refers to the maximum temperature range that the test zone can actually run to; the test load directly affects how many test items can be placed. Generally speaking, the greater the weight, the better; it refers to the time it takes for the test product to switch from one temperature point to another. Our common specification convention is ≤5min. The smaller the time, the better; the longer the defrost interval, the better. Now some manufacturers are able to do defrosting once per 1000 cycles, which is very ideal. The shorter the defrost interval, the worse the airtightness of the device; the sensor must be placed inside the test area. Some manufacturers place the sensor inside the air duct, although it is only 10cm away from the test area, but this energy difference is quite large. And can not truly reflect the temperature change of the surface of the test article.
The high and low temperature impact test chamber is the most difficult among all environmental test equipment, and the price is also the highest. Therefore, you should fully understand before purchasing this equipment, and consult the manufacturer. Do n’t rush or over-consider the price to bury hidden dangers for future trials.
Some technical parameters that need to be paid attention to when choosing high and low temperature impact test chamber
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