The test methods mentioned in the high and low temperature test chamber standards can be classified into three categories, surface thermometers, anemometers, thermometers, etc.
The thermometer is a temperature measurement system composed of platinum resistance, thermocouple or other similar temperature sensors and meeting the following requirements:
Sensor time constant: 20s ~ 40s;
Extended uncertainty of temperature measurement system (k = 2): not more than 0.4 ℃.
The anemometer is used to test the wind speed of the box. The standard wind speed of our high and low temperature test box should be 3.7m / S (the test box is driven by the motor to generate a wind circulation to form the principle of air supply. Hot air, cold air, mist, etc. are sent to all corners of the box to form a series of indicators such as uniformity, fluctuation, humidity deviation, etc., to ensure the accuracy of the test results. m / S.
Surface thermometer, also known as temperature sensor, transmits the temperature point detected in the box to the instrument, so that the operator can intuitively understand the deviation between the actual temperature value and the set value in the box, so as to monitor the box in real time. Temperature, it is a measurement system composed of platinum resistance or other similar sensors and meeting the following requirements: sensor time constant: 20s ~ 40s; extended uncertainty of temperature measurement system (k = 2): not more than 1.0 ℃.
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