There are two ways to mention the temperature change rate of the rapid temperature change 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 and the time within the variable temperature range of the test box. The technical parameters of the temperature change rate provided by the foreign environmental testing equipment manufacturers all refer to the average rate of the whole process.
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, the most difficult and most critical period to ensure the linear temperature rise and fall speed is that the vortex flowmeter can reach the test chamber within the last 5 minutes of the temperature drop period. Cooling rate. Therefore, the test equipment preferably has two parameters: the average temperature rising and falling speed and the linear temperature rising and falling speed (average speed every 5min). 2.
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