Definition of temperature
Temperature is a physical quantity that represents the degree of coldness or heat of an object, and at the microscopic level, it is the intensity of molecular thermal motion of the object.

Fahrenheit and Celsius are both units used to measure temperature. Many countries in the world, including China, use Celsius degrees, while the United States and some other English speakers use Fahrenheit degrees and use Celsius degrees less. The conversion formula is:
T（℉）= 1.8t（℃）+32

Definition of Humidity
A physical quantity that represents the degree of atmospheric dryness. The less water vapor there is in a certain volume of air at a certain temperature, the drier the air will be; The more moisture there is, the more humid the air becomes. The degree of dryness and wetness of the air is called humidity.
Absolute humidity: The mass of water vapor contained in a certain volume of air, typically measured in grams per cubic meter (g/m3);
Relative humidity: Relative humidity is the ratio between humidity and high humidity, and its value indicates how high the saturation of water vapor is. The humidity usually referred to (80% RH, humidity displayed on the thermometer, etc.) is relative humidity.

The main differences between temperature and humidity combined cycle and alternating humid heat and other humid heat tests are:
The temperature and humidity combination cycle test shows multiple temperature changes or respiratory effects within a given time;
A larger range of circulating temperatures;
A significant rate of temperature change;
Including multiple temperature changes below zero degrees.

What are the main applications of high or low temperature testing?
Mainly used to assess the adaptability of electricians and electronic products to storage and use under high or low temperature conditions.

What are the main applications of constant temperature and humidity testing?
Mainly used to assess the adaptability of electrical and electronic products, components, materials, etc. for use and storage under constant humid and hot conditions.

What are the main applications of alternating humidity and heat testing?
Mainly used to assess the adaptability of electrical and electronic products or materials to use and store under humid and hot conditions such as temperature cycling and condensation on product surfaces.

What are the main applications of temperature change testing?
a. The temperature change that specifies the conversion time is mainly used to determine the ability of components, equipment, and other products to withstand rapid changes in environmental temperature;
b. The temperature change that specifies the rate of temperature change is mainly used to determine the working ability of components, equipment, and other products under environmental temperature changes;
c. The dual tank method for temperature changes is mainly used to determine the ability of components, equipment, or other products to withstand rapid temperature changes. It is mainly suitable for glass metal seals and similar test samples.

What are the main testing conditions that need to be confirmed for high or low temperature testing?
Temperature, heating and cooling rate or time, testing time.

What are the main testing conditions that need to be confirmed for constant temperature and humidity testing?
Temperature, humidity, heating and cooling rate or time, testing time.

What are the main testing conditions that need to be confirmed for the temperature change test that specifies the conversion time?
Temperature (low temperature, high temperature), holding time, temperature change rate.

In general temperature and humidity related tests, besides the main testing parameters, what other factors need to be confirmed?
a. Functional testing before and after testing;
b. Whether power on operation and other intermediate tests are required during testing;
c. The placement or orientation of the sample during testing;
d. What is the heating power of the sample when it is powered on;
e. Sample dimensions and quality;
f. Is it necessary to take anti-static measures when in contact with the sample;
g. Other