Temperature fluctuation setting of high and low temperature cycle test chamber - Database & Sql Blog Articles

The temperature fluctuation degree of the high and low temperature cycle test chamber is set. The temperature and humidity test chamber of the high and low temperature cycle test chamber has two conditions: a constant test chamber and an alternating test chamber. Ordinary high and low temperature test chambers generally refer to constant high and low temperature test chambers, which are controlled by setting a target temperature and the ability of the test chamber to automatically constant temperature to the target temperature point. The control mode of the constant temperature and humidity test chamber is similar, setting a target temperature and humidity point, and the test box has the ability to automatically adjust the temperature to the target temperature and humidity point.
The high and low temperature alternating test chamber has the program of setting one or more high and low temperature changes and circulation. The test chamber has the ability to complete the test process according to the preset curve, and can accurately control within the range of maximum heating and cooling rate capability. The rate of temperature rise and temperature drop, that is, the temperature rise and temperature drop rate can be controlled according to the slope of the set curve. Similarly, the high and low temperature alternating heat and humidity test chamber also has a preset temperature and humidity curve, and the ability to control according to presets.

Temperature fluctuation is a relatively easy to implement parameter, and the actual temperature fluctuations of most test chambers of all environmental test equipment manufacturers can be controlled within ±0.3 °C.

Temperature uniformity, in order to more accurately simulate the actual environmental conditions suffered by the product in nature, it is necessary to ensure that the tested product is at the same temperature and ambient conditions in the environmental test. For this reason, the temperature gradient in the test chamber must be Temperature fluctuations are limited. In the general rule of the national military standard GJB150.1-86 military equipment environmental test method, it is clearly stated that "the temperature of the measuring system near the test sample should be within ±2 °C of the test temperature, and the temperature does not exceed 1 °C/m or the total maximum value is 2.2 ° C".