The temperature and humidity test chambers of the high and low temperature test chambers can be divided into: constant test chambers and alternating test chambers.
The high and low temperature test chamber generally refers to the constant high and low temperature test chamber, and its control method is: setting a target temperature, and the test chamber has the ability to automatically thermostat to the target temperature point. The control and control method of the constant temperature and humidity test box is also similar. Set a target temperature and humidity point. The test box has the ability to automatically thermostat to the target temperature and humidity point.
The high and low temperature alternating test chamber has one or more high and low temperature change and cycle programs. The test chamber has the ability to complete the test process according to the preset curve, and can be accurately controlled within the range of the maximum heating and cooling rate capability The heating and cooling 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 preset temperature and humidity curves, and the ability to control according to presets. Of course, the alternating test chamber has the function of a constant test chamber, but the manufacturing cost of the alternating test chamber is higher, because the alternating test chamber needs to be equipped with an automatic curve recording device, a program control instrument, and the test chamber must also be solved in the working room. The problem of turning on the refrigerator when the temperature is high, therefore, the price of the alternating test chamber is generally more than 20% higher than the price of the constant test chamber.
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