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2. The temperature range of high and low temperature test chambers of various specifications and speeds are generally the same, ie, -60 to +130 °C, but the range of temperature variation for assessing the cooling rate is not the same. According to different test requirements of the test, rapid temperature The temperature range of the change test chamber is -55 to +80 °C, and some are -40 to +80 ° C.
3. There are two ways to describe the temperature change rate of high and low temperature test chambers . One is the average temperature rise and fall speed in the whole course, and the other is the linear temperature rise and fall speed ( actually, the average speed every 5 minutes). The overall average speed refers to the ratio of the difference between the maximum temperature and the minimum temperature to the time within the variable temperature range of the test box.
How to set the high and low temperature test chamber
How to set the high and low temperature chamber
1. There is no indicator of the cooling rate in the high and low temperature test chambers. The time from the ambient temperature drop to the nominal minimum temperature is generally 90 to 120 minutes . The high and low temperature alternating test chambers and the high and low temperature alternating humidity and humidity test chambers all have the requirement of variable temperature speed. The temperature change rate is generally required to be 1 °C /min , and the speed can be adjusted within the range of this speed. The temperature change rate of the rapid temperature change test chamber is faster, and the temperature increase and decrease rate can reach 3 °C /min ~ 15 °C /min . The temperature rise and temperature decrease rate can reach 30 °C /min or more in some temperature zones .