DO-160 Temperature Tests (Section 4, 5) Devices

DO-160 Temperature Tests (Section 4, 5) Devices
What are DO-160 Temperature Tests?

The DO-160 standard includes environmental test procedures for aerospace electronics. Temperature tests are used to assess the durability of devices under different operating and storage temperatures.

Which Sections of DO-160 Cover Temperature Tests?

Temperature tests in the DO-160 standard are covered in the following two main sections:

• Section 4: Low Pressure (High Altitude) and Temperature Tests
• Section 5: Temperature and Thermal Shock Tests

These tests are applied to determine whether aerospace equipment can withstand typical operating conditions ranging from -55°C to +85°C.

How are DO-160 Temperature Tests Conducted?

These tests are performed in three main categories: operating temperature, storage temperature, and thermal shock.

1. Low Temperature Test
   Purpose: To test the device’s ability to operate in extremely cold environments.
   The device is left at the specified low temperature (usually -55°C) for a set duration.
   Afterward, the operating conditions are monitored, and functionality is checked.
2. High Temperature Test
   Purpose: To determine the device’s durability in extremely hot environments.
   The device is exposed to high-temperature conditions (e.g., +85°C).
   At the end of the set duration, the device’s functionality is tested.
3. Storage Temperature Test
   Purpose: To test the device’s resistance to long-term storage conditions.
   The device is left at the extreme temperatures specified in the standard for an extended period (usually 72 hours or more).
   After the storage period, the device is retested.
4. Thermal Shock Test
   Purpose: To test the device’s resistance to rapid temperature changes.
   The device is exposed to sudden temperature changes (such as transitioning from -55°C to +85°C within a few minutes).
   The test result evaluates whether there is any structural damage to the device.

The Importance of DO-160 Temperature Tests in Aviation

Electronic equipment used in aircraft can be exposed to extreme cold and hot conditions at high altitudes. Therefore, the devices are tested to see if they can withstand these conditions.
Thermal shock tests are especially critical for equipment near aircraft engines or exposed to outdoor conditions.

Which Standards are DO-160 Temperature Tests Compatible With?

• MIL-STD-810G (Method 501.5 & 502.5): Similar temperature tests are found in U.S. military standards.
• IEC 60068-2-1 & 2-2: International temperature tests for electronic devices.
• EUROCAE ED-14: A standard adopted by the European aerospace industry.

Conclusion

Temperature tests under the DO-160 standard are a crucial component for aerospace electronics. These tests ensure that devices can safely operate in both extremely cold and hot environments. Without proper testing, hardware failures and operational risks in aircraft systems may occur.

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