When we use the high and low temperature testing machine, sometimes we will encounter the temperature is not uniform, so what is the cause of this problem?

1, the structure of the structure of the equipment to a large extent affect the working middle temperature uniformity. Because the structure is difficult to be completely symmetrical, the uniform temperature from the face has an adverse effect. The door is in the front, the air conditioning room is at the back of the box, the upper supply air and the lower return air, and the forced convection. This kind of structure has good symmetry between left and right, and can easily achieve uniform temperature between left and right. 2, the sealing of the sealed box is not good, such as the door leakage, which affects the uniform temperature of the equipment studio. 3, the test volume is too large if the detection of temperature deviation requires that the test is placed in the work room, when the test volume is too large, or the way or location of the placement is inappropriate, the air convection is blocked, and it will also lead to a large temperature deviation. 4, the box wall heat conduction problem due to the heat conduction of the high and low temperature testing machine, and the heat loss of the high temperature box leakage or cold box leakage, in order to compensate for the heat loss, there will be a supply air temperature difference, the high temperature box supply air temperature is higher than the working temperature in the box, the low temperature box supply air temperature is lower than the working temperature in the box. Due to the inevitable supply air temperature difference, the temperature in the working room is not uniform.