test project

 low air pressure test

       reference standard

       GBT 2423.26-2008， IEC 60068-2-41-1976

       capabilities

       0~100Kpa;400×400×400mm

The low air pressure test is a test in which the test sample is placed into a test chamber (chamber), and then the air pressure in the chamber (chamber) is reduced to the value specified in relevant standards and maintained for a specified duration. Its purpose is mainly to determine the adaptability of components, equipment or other products to low-pressure environments during storage, transportation and use.

1. equipment requirements

The air pressure test chamber (chamber) shall have enough space to accommodate the test samples, and be capable of air pressure and temperature control, reduce the air pressure to the target pressure value at a rate of no more than 15kPa/min, and maintain the air pressure for a predetermined time.

2. test method

Place the sample in an air pressure test chamber, reduce the air pressure to 65kPa(±5%) at a rate of no more than 15kPa/min, and continuously maintain the pressure for a predetermined time and temperature. After the specified time is reached, fill dry air that meets the temperature of the test chamber at a pressurization rate of no more than 15kPa/min until it returns to the original state. Inspect the damage to the packaging and contents according to relevant standards and analyze the test results.

3. test conditions

The test conditions mainly include the low air pressure value, the duration of the low air pressure test, the temperature in the test chamber and the number of packages to be tested repeatedly.

When air transport, if a pressurized cabin aircraft is used, or a non-pressurized cabin is used but the aircraft flying altitude does not exceed 3500m, the air pressure value can be 65kPa when conducting the low pressure test.

When the flying altitude of an aircraft in a non-pressurized cabin exceeds 3500m, the air pressure values and temperature parameters for the low-pressure test of the transport package can be selected according to the figure.

The duration of the test can be selected within 2, 4, 8, and 16 hours.