Knowledge of variable temperature rate of high and low temperature test chamber

There are two ways to mention the temperature change rate of the high and low temperature test chamber, one is the average temperature increase and decrease speed in the whole process, and the other is the linear temperature increase and decrease speed (actually the average speed every 5min). The average speed of the whole process refers to the ratio of the difference between the highest temperature and the lowest temperature to the time within the variable temperature range of the test box.

At present, the technical parameters of the temperature change rate provided by various foreign environmental test equipment manufacturers refer to the overall average rate. The linear temperature rise and fall speed refers to the rate of temperature change that can be guaranteed in any period of every 5 minutes. In fact, for the rapid temperature change high and low temperature test chamber, it is the most difficult and most critical period to ensure the linear temperature rise and fall speed. During the last 5 minutes of the temperature decrease period, the cooling rate that the test chamber can reach.

Therefore, the high and low temperature test chamber preferably has two parameters: the average temperature rise and fall speed and the linear temperature rise and fall speed (average speed every 5min). Generally speaking, the linear temperature rise and fall speed (average speed every 5min) is the average temperature rise and fall speed. 1/2.

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