Airborne equipment pressure test

The purpose of the pressure test of aircraft airborne equipment is to determine the adaptability of airborne equipment to the pressure environment and its changing process. Zhongke Testing Reliability Experiment Center has the environmental testing capabilities for various aircraft airborne equipment, and provides professional environmental testing services such as pressure testing, sand and dust testing, mold testing, and salt spray testing for aircraft airborne equipment.

Altitude pressure tests are divided into three categories, namely low pressure test, decompression test and overpressure test.
The decompression test is mainly suitable for: equipment installed in the pressurized area of the aircraft that is required to work during and after emergency pressure reduction (such as communications, flight instrument systems and flight control equipment), equipment installed with high-voltage electrical/electronic circuits (such as displays), and equipment installed in part of the pressurized area;
The overpressure test is mainly applicable to equipment installed in the pressurized area to determine whether the equipment can withstand the cabin overpressure caused by routine aircraft pressurization system tests.

Low pressure test: The test pressures of various types of equipment are different.
Decompression test: Starting pressure: 75.26 kPa (corresponding altitude is 2400 m); final pressure: equivalent pressure at the maximum flight altitude of the aircraft.
Overpressure test: Overpressure pressure: 170kPa (equivalent height is -4752 m).

HB 6167.2-2014 Environmental conditions and test methods for airborne equipment of civil aircraft Part 2: Temperature and altitude test
HB 6167.1-2014 Environmental conditions and test methods for airborne equipment of civil aircraft Part 1: General provisions
GB/T 4937.2-2018 Semiconductor devices - Mechanical and climatic test methods Part 2: Low pressure
GB/T 4857.13-2005 Packaging Basic tests for transport packages Part 13: Low pressure test method
DZ 0039.10-1992 Basic environmental test conditions and methods for geological instrument products Low pressure test
GB/T 2424.15-2008 Environmental testing of electrical and electronic products Temperature/low pressure comprehensive test guidelines
GB/T 2423.21-2008 Environmental test procedures for electrical and electronic products Part 2: Test methods Test M: Low pressure