The difference between accuracy and uniformity of constant temperature and humidity machines
2023-10-28 16:10:39
admin
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The difference between the accuracy and uniformity of constant temperature and humidity machines: Many users are unaware of the difference between the two. For example, the requirement is 20 degrees ± 2 degrees, and the humidity is ± 5% relative humidity. In fact, there is a significant difference between the two; In fact, the term precision is incorrect. Accuracy should refer to the display accuracy and control accuracy of the instrument. In general, the instrument display accuracy temperature is 0.1 ℃, humidity is 0.1% RH, control accuracy temperature is 0.3 ℃, and humidity is about 1% RH.
The correct expression for a constant temperature and humidity machine should be volatility, which refers to the difference between the actual measured value and the set value of the instrument. This can affect the sensitivity of the sensor, the accuracy of the control instrument, and the response speed of the executing components. The more obvious the value, the more stable the temperature and humidity at the same point. According to its own understanding, it is often referred to as' accuracy '. Uniformity refers to the difference from the average value of the entire control area. The higher the value, the worse the uniformity in space. The accuracy index of a constant temperature and humidity machine is easy to achieve, while the uniformity index is difficult to achieve. It not only has high requirements for instrument sensors, but also has high requirements for the air duct design and control system of the entire system. Generally speaking, positive or negative 2 degrees should refer to accuracy (volatility). If it is a laboratory with high precision requirements, then it is consistent and therefore needs to maintain clarity in communication.
