What affects the uniformity of the high and low temperature test chamber

Is there a big difference in temperature at various points in the high and low temperature test chamber? What affects the uniformity of the high and low temperature test chamber? This problem sometimes occurs when people use the test box. How to understand and solve these problems? The following Goldman Sachs test equipment summarizes many years of maintenance experience and lists them for you:

One: The test sample is too large. If the volume of the test sample is too large, it will affect the air circulation in the the high and low temperature test chamber, resulting in excessive temperature uniformity deviation. According to the standard, the test sample volume cannot exceed 1/3 of the laboratory space.

Second: The test sample is loaded. If the test sample is loaded, please explain the load condition to the manufacturer in advance. Otherwise, it will have a great impact on subsequent tests.

Third: the placement of test samples. If the test sample is placed incorrectly and the air convection is blocked, it will also cause a larger temperature deviation. Must not be placed at the air outlet.

Fourth: The tightness of the high and low temperature test chamber is not good. For example, the door leaks, which is also one of the important factors affecting the uniform temperature of the test chamber.

Fifth: cabinet structure. Due to the unreasonable design of the high and low temperature box structure by the manufacturer, it affects the uniformity of the working temperature to a large extent. The best structure should be easy to reach the left and right temperature uniformity: heating and cooling should be at the back of the box, with the upper air supply and the lower return air, forced convection.