I. Main Parameters： 
The high and low temperature alternating test chamber, also known as the constant temperature and humidity test chamber, can accurately simulate complex natural conditions such as low temperature, high temperature, high temperature and high humidity, low temperature and low humidity. It is suitable for quality control testing in industries such as electronics, electrical appliances, batteries, plastics, food, paper products, vehicles, metals, chemicals, building materials, research institutes, inspection and quarantine bureaus, universities, etc. It complies with the following test standards: GB/2423.1; GB/2423.2; GB/2423.3; GB/2423.4.
II. Scope: 
1.Temperature: Room temperature -40 to +1500 degrees Celsius
2. Relative humidity: 20% - 98%
3. Power: Approximately 3.5KW
4. Inner box dimensions: 500*400*500 mm
5. Outer box dimensions: approximately 1000 * 870 * 1700 mm
6. Power Supply: 40A / 220V
7. Heating and cooling rate: Approximately 10°C to 30°C per minute. Cooling rate: Approximately 0.80°C to 10°C per minute.
Machine accuracy: 1. Resolution accuracy: a. Temperature: 0.010°C  b. Humidity: 0.1%RH
8. Control Accuracy: a. Temperature: ±0.30°C  b. Humidity: ±1.5%RH
9. Temperature and Humidity Uniformity: a. Temperature uniformity ±10°C  b. Relative humidity uniformity: ±2%RH
10. Temperature fluctuation: ±0.5°C