The high and low temperature low pressure test chamber is specifically designed for the electronics industry, defense, aerospace, and scientific research institutions to evaluate the quality and reliability of electronic products—including components, materials, equipment, and complete systems—under the influence of extreme temperatures and low atmospheric pressure. It also supports various tests related to electrical performance parameters and adaptability during storage and operation. When purchasing a high and low temperature low pressure test chamber, it's essential to understand the key performance requirements and technical specifications that ensure accurate and reliable testing.
The performance and technical indicators required for a high and low temperature low pressure test chamber include:
- **Temperature Range**: High temperature options include 30°C, 40°C, 55°C, 70°C, 85°C, 100°C, 125°C, 155°C, and 175°C. Low temperature options range from 5°C down to -65°C.
- **Temperature Deviation**: At atmospheric pressure, the deviation should be ±2°C. For combined temperature and low-pressure testing at ≤100°C, it should be ±3°C, and for temperatures above 100°C up to 200°C, it can be ±5°C.
- **Temperature Gradient**: The temperature difference within the working chamber should not exceed 2°C.
- **Temperature Fluctuation**: The fluctuation should be kept within 1.0°C.
- **Wall Temperature Difference**: The difference between the inner wall temperature and the working space temperature should not exceed 3% at high temperatures and 8% at low temperatures.
- **Air Pressure Levels**: Common pressure levels include 84 kPa, 79.5 kPa, 70 kPa, 61.5 kPa, 55 kPa, 40 kPa, 25 kPa, 15 kPa, 8 kPa, 4 kPa, 2 kPa, and 1 kPa.
- **Air Pressure Deviation**: The deviation is ±2 kPa for pressures between 84 kPa and 40 kPa, ±0.5 kPa for pressures between 25 kPa and 4 kPa, and ±0.1 kPa for pressures below 2 kPa.
- **Heating and Cooling Rate**: The average rate should not exceed 1°C/min over 5 minutes, or the fastest heating/cooling time as specified by the manufacturer.
- **Pressure Change Rate**: Should not exceed 10 kPa/min.
- **Airflow Speed**: Typically ≤1 m/s, or adjustable depending on the model.
**Note**: In low-temperature and low-pressure testing, if the air pressure drops below 10 kPa, or in high-temperature and low-pressure testing when the pressure is below 4 kPa, the temperature deviation may be relaxed slightly. The fastest heating and cooling times are defined by the manufacturer in the product’s technical documentation. Similarly, the adjustable range for airflow speed is also specified by the manufacturer.
These specifications ensure that the test chamber meets the necessary standards for accurate environmental simulation and product evaluation.
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