Performance and index requirements of high and low temperature and low pressure test chamber

March 05, 2021

The performance and index requirements of the high and low temperature and low pressure test chamber are as follows:
Temperature grade: high temperature 30 â„ƒ, 40 â„ƒ, 55 â„ƒ, 70 â„ƒ, 85 â„ƒ, 100 â„ƒ, 125 â„ƒ, 155 â„ƒ, 175 â„ƒ, low temperature 5 â„ƒ, -5 â„ƒ, -25 â„ƒ, -30 â„ƒ, -40 â„ƒ , -55 â„ƒ, -65 â„ƒ.
Temperature deviation: Â± â„ƒ during normal pressure temperature test; Â± 3 â„ƒ when temperature and low pressure comprehensive test is â‰¤100 â„ƒ, Â± 5 â„ƒ when> 100 â„ƒ ï½ž 200 â„ƒ
Temperature gradient: â‰¤2 â„ƒ
Temperature fluctuation: â‰¤1.0 â„ƒ
The difference between the temperature of the working chamber wall and the temperature of the working space: at high temperature level, it should not be higher than 3% of the temperature of the high and low temperature and low pressure test chamber; at low temperature level, it should not exceed 8% of the temperature of the test chamber.
Air pressure level: 84kPa, 79.5 kPa, 70 kPa, 61.5 kPa, 55 kPa, 40 kPa, 25 kPa, 15 kPa, 8 kPa, 4 kPa, 2 kPa, 1 kPa.
Air pressure deviation: Â± 2 kPa for 84kPa ï½ž 40 kPa; Â± 0.5 kPa for 25kPa ï½ž 40kPa; Â± 0.1kPa for â‰¤2kPa.
Rising and cooling rate: Calculated every 5 minutes, the average rate is not more than 1 â„ƒ / min; or specify the fastest rising and cooling time.
Pressure change rate: â‰¤10 â„ƒ kPa
Wind speed: â‰¤1m / s or adjustable.
Note: If the air pressure is lower than 10 kPa during the low temperature and low pressure test, or if the air pressure is lower than 4 kPa during the high temperature and low pressure test, the temperature deviation can be appropriately relaxed; the manufacturer shall specify the fastest heating time and Cooling time; the manufacturer shall specify the adjustable range of wind speed in the product technical document.

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