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 extreme conditions of high and low temperatures combined with low atmospheric pressure. This equipment also supports a variety of electrical performance tests, ensuring that products can function effectively during storage and operation in different environments. When purchasing such a test chamber, it's essential to understand the key performance requirements and technical specifications that ensure accurate and reliable testing.
The main performance and technical indicators of 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 ranges are typically 5°C, -5°C, -25°C, -30°C, -40°C, -55°C, and -65°C.
- **Temperature Deviation:** At atmospheric pressure, the deviation should be ±2°C. For combined temperature and low-pressure testing below 100°C, it should be ±3°C, and above 100°C up to 200°C, ±5°C.
- **Temperature Gradient:** The internal temperature gradient should not exceed 2°C.
- **Temperature Fluctuation:** The fluctuation should remain 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 varies depending on the pressure level—±2 kPa for pressures between 84 kPa and 40 kPa, ±0.5 kPa for 25 kPa to 4 kPa, and ±0.1 kPa for ≤2 kPa.
- **Heating and Cooling Rate:** The average rate should not exceed 1°C/min over a 5-minute period, or the manufacturer may specify the fastest heating and cooling times.
- **Pressure Change Rate:** The air pressure change rate should be ≤10 kPa/min.
- **Airflow Speed:** The airflow speed should be ≤1 m/s, or adjustable as per requirement.
**Note:** In low-temperature and low-pressure tests, if the air pressure drops below 10 kPa, or in high-temperature and low-pressure tests where the pressure is below 4 kPa, the temperature deviation may be adjusted accordingly. The fastest heating and cooling times, as well as the adjustable range for wind speed, are defined by the manufacturer in the product’s technical documentation.
These specifications ensure that the test chamber provides accurate and repeatable environmental simulation, allowing manufacturers to assess product performance under real-world conditions. Whether you're conducting qualification testing, failure analysis, or reliability evaluation, choosing a test chamber that meets these standards is crucial for obtaining meaningful results.
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