What is RTCA DO-160 Temperature Testing?
RTCA DO-160, Environmental Conditions and Test Procedures for Airborne Equipment, provides environmental qualification procedures for airborne electronic equipment.
Temperature-related testing helps determine whether avionics and associated equipment can maintain the required performance when exposed to specified thermal conditions.
Typical test articles include:
• Flight control computers
• Navigation and communication equipment
• Aircraft displays and cockpit electronics
• Electronic control units
• Aircraft sensors and monitoring systems
• Power distribution and conversion equipment
• Radar and airborne communication modules
• UAV electronics and flight instrumentation
The objective is not simply to expose a product to high and low temperatures. Engineers must verify the required functional behavior under the specified conditions and document the results against the applicable qualification plan.
Which RTCA DO-160 Sections Cover Temperature Testing?
Section 4 — Temperature and Altitude
Section 4 addresses temperature and altitude conditions relevant to airborne equipment.
Depending on the applicable category and qualification requirements, the test setup may need to reproduce specified temperature and pressure conditions while the equipment is operating or in another defined state.
Important engineering considerations include:
• Required temperature conditions
• Pressure-altitude requirements
• Equipment operating state
• Environmental stabilization
• Pressure and temperature monitoring
• Functional performance during exposure
• Test duration and acceptance criteria
When both temperature and pressure must be controlled, an integrated temperature-altitude chamber may be required.
For detailed pressure and altitude considerations, see the RTCA DO-160 Altitude Testing Guide.
Section 5 — Temperature Variation
Section 5 addresses temperature variation for airborne equipment.
The applicable test profile determines the temperature conditions, transition requirements, exposure periods, and equipment monitoring needed during qualification.
Engineers should evaluate:
• Temperature transition requirements
• Specified exposure and stabilization periods
• Functional operation during applicable test stages
• Thermal response of the test article
• Recovery and post-test inspection
• Required test data and acceptance criteria
Temperature variation testing should not automatically be equated with thermal shock testing. The required transition profile and test procedure must come from the applicable DO-160 requirements and qualification plan.
Section 6 — Humidity
Section 6 addresses humidity-related environmental conditions.
When humidity testing is required, the chamber must provide the environmental controls and monitoring necessary for the specified test profile. Humidity capability should not be assumed to be part of every temperature test configuration.
For a combined temperature and humidity requirement, engineers should confirm the applicable test conditions, chamber operating envelope, specimen heat load, and monitoring requirements before specifying the equipment.
Why RTCA DO-160 Temperature Testing Matters
Aircraft components experience continuous environmental stress throughout their service life.
Without proper qualification testing, manufacturers may encounter:
Electronic component failure
PCB solder fatigue
Connector deformation
Display malfunction
Plastic housing cracking
Seal leakage
Material aging
Reduced operational reliability
RTCA DO-160 temperature testing helps engineers validate long-term durability while reducing maintenance costs and improving flight safety.
RTCA DO-160 Temperature Test Requirements
There is no single temperature range, ramp rate, or test duration that applies universally to all DO-160 qualification programs. The applicable conditions depend on the relevant section, category, equipment installation environment, and test plan.
Before configuring the chamber, establish the following parameters.
1. Temperature limits
Define the required minimum and maximum temperatures for the applicable test.
2. Temperature variation profile
Specify the required temperature transitions, stabilization periods, and exposure sequence.
3. Equipment operating condition
Determine whether the equipment must operate continuously, operate during selected stages, or remain unpowered during particular exposures.
4. Pressure-altitude conditions
For Section 4 testing, identify the applicable pressure-altitude requirements and determine whether pressure and temperature must be controlled simultaneously.
5. Test article dimensions and heat load
Record the dimensions, mass, power dissipation, mounting arrangement, and thermal characteristics of the equipment under test (EUT).
6. Instrumentation and data recording
Define the required chamber sensors, EUT temperature measurements, functional monitoring, sampling intervals, and reporting format.
7. Acceptance criteria
Establish the required functional performance, permissible deviations, failure criteria, and post-test inspection requirements before testing begins.
These parameters form the basis of the test specification and the environmental chamber request for quotation (RFQ).
How Is RTCA DO-160 Temperature Testing Performed?
The exact sequence must follow the applicable DO-160 section and approved qualification plan. A typical engineering workflow includes the following stages.
Step 1: Review the Qualification Requirements
Identify the applicable DO-160 revision, section, category, equipment installation conditions, and customer or certification requirements.
Confirm which environmental tests apply to the equipment rather than assuming every section is required.
Step 2: Prepare the Test Article
Document the EUT configuration, electrical connections, mounting fixtures, operating modes, and monitoring interfaces.
The test configuration should represent the condition required by the qualification plan.
Step 3: Configure the Environmental Chamber
Program the required temperature profile and, when applicable, pressure-altitude or humidity conditions.
Confirm that the chamber can accommodate the test article and fixtures while maintaining the required environmental conditions under the intended load.
Step 4: Stabilize and Execute the Test
Apply the specified environmental profile and monitor the chamber and EUT throughout the required test stages.
Record relevant environmental measurements, equipment status, functional observations, alarms, and deviations.
Step 5: Verify Functional Performance
Evaluate the EUT against the predefined acceptance criteria during the applicable test stages and after exposure.
The assessment may include electrical performance, system operation, sensor outputs, communication functions, display behavior, or other product-specific parameters.
Step 6: Document the Results
Compile the environmental profile, calibration information, recorded measurements, equipment configuration, deviations, functional results, and final assessment.
The report should provide sufficient evidence to demonstrate whether the specified test conditions were achieved and whether the EUT met the applicable acceptance criteria.
RTCA DO-160 vs MIL-STD-810 vs IEC 60068 Temperature Testing Comparison
Different industries use different environmental testing standards depending on application requirements. Understanding the differences helps engineers select the correct qualification method and environmental test equipment.
| Comparison | RTCA DO-160 Temperature Testing | MIL-STD-810 Temperature Testing | IEC 60068 Temperature Testing |
|---|---|---|---|
| Main Application | Aircraft and avionics equipment qualification | Military and defense equipment environmental testing | Electronic components and industrial products testing |
| Primary Industry | Aerospace, aviation, avionics, UAV | Military, defense, aerospace, rugged electronics | Electronics, automotive, semiconductor, industrial equipment |
| Standard Organization | RTCA (Radio Technical Commission for Aeronautics) | U.S. Department of Defense | International Electrotechnical Commission |
| Main Purpose | Verify airborne equipment reliability under aircraft environments | Verify equipment durability under military operating conditions | Evaluate product resistance to environmental stress |
| Typical Products | Flight computers, navigation systems, cockpit electronics, aircraft sensors | Military communication systems, vehicles, weapons electronics, field equipment | PCB, semiconductor devices, automotive electronics, consumer electronics |
| Temperature Testing Focus | Aircraft operating temperature, ground survival, altitude-related thermal conditions | Extreme temperature exposure, operational and storage durability | High/low temperature, temperature cycling, thermal shock |
| Temperature Cycling | Included for aircraft environmental qualification | Included with mission profile simulation | Widely used for electronic reliability testing |
| Temperature Range | Depends on aircraft equipment category and installation location | Depends on military application requirements | Depends on test method requirements |
| Testing Environment | Aircraft cabin, external aircraft locations, avionics compartments | Battlefield, outdoor, transportation, storage environments | Laboratory-controlled environmental simulation |
| Common Test Equipment | Aerospace temperature chamber, thermal cycling chamber | Military environmental chamber, climatic chamber | Temperature chamber, humidity chamber, thermal shock chamber |
| Typical Users | Aircraft manufacturers, avionics suppliers, aerospace labs | Defense contractors, military research organizations | Electronics manufacturers, reliability laboratories |
RTCA DO-160 Temperature Testing vs Thermal Shock Testing
Many engineers confuse temperature cycling testing with thermal shock testing. Although both evaluate thermal reliability, the stress mechanisms are different.
| Item | RTCA DO-160 Temperature Testing | Thermal Shock Testing |
|---|---|---|
| Main Objective | Verify aircraft equipment performance under temperature environments | Evaluate sudden extreme temperature transition resistance |
| Temperature Change Speed | Controlled temperature variation | Very rapid temperature transfer |
| Stress Type | Thermal aging and expansion/contraction stress | Severe thermal shock stress |
| Typical Application | Avionics qualification, aircraft electronics | Semiconductor, PCB, automotive electronics |
| Test Duration | Usually longer environmental exposure | Short repeated transfer cycles |
| Equipment Required | Temperature test chamber / thermal cycling chamber | Two-zone or three-zone thermal shock chamber |
Engineering Insight:
For avionics qualification, RTCA DO-160 temperature testing is usually the primary requirement. Thermal shock testing may be added when components contain sensitive materials, solder joints, or multi-material structures requiring accelerated failure evaluation.
How TestEQ Supports RTCA DO-160 Testing
TestEQ supplies customized environmental simulation systems for aerospace manufacturers, laboratories, universities, and research institutes.
Key Advantages
Wide temperature range suitable for aerospace qualification
Excellent temperature uniformity for repeatable testing
Fast recovery after door opening
Stable long-duration operation
Programmable temperature cycling profiles
PLC and touch-screen intelligent control
Remote monitoring and data logging
Custom chamber sizes available
Our engineering team can also customize chamber configurations according to RTCA DO-160 qualification requirements, specimen dimensions, cable routing, observation windows, and automation needs.
Industries That Benefit from RTCA DO-160 Testing
RTCA DO-160 temperature qualification is widely used across:
Commercial Aviation
Military Aviation
UAV Systems
Space Electronics
Aerospace Manufacturing
Aircraft Maintenance Organizations
Defense Electronics
Flight Instrument Development
Research Laboratories
Certification Centers
How to Select a Temperature Test Chamber for DO-160
For procurement teams, selecting a chamber should begin with the qualification requirements rather than a generic temperature range.
Temperature Performance
Confirm the required temperature range, stability, uniformity, transition profile, and performance under the intended test load.
Chamber Working Volume
Allow sufficient space for the EUT, fixtures, sensors, cable routing, airflow, and maintenance access.
Equipment Operating Interfaces
Determine whether the EUT needs external power, signal cables, communication interfaces, or feedthroughs during testing.
Combined Temperature and Altitude Capability
For applicable Section 4 requirements, confirm the necessary pressure range, pressure-control profile, temperature integration, and operating conditions.
Data Acquisition and Monitoring
Specify temperature and pressure logging where applicable, EUT monitoring channels, alarm handling, and exportable test records.
Safety and Reliability
Review over-temperature protection, pressure-related safeguards, electrical protection, emergency shutdown, and any product-specific hazards.
Calibration and Documentation
Clarify calibration requirements, sensor traceability, acceptance testing, installation support, and the documentation required by the laboratory or qualification program.
The chamber configuration should be verified against the actual test requirements before the purchase order is finalized.
What Should an RTCA DO-160 Chamber RFQ Include?
A useful RFQ should give the supplier enough information to assess feasibility and propose a technically appropriate configuration.
Include:
• Applicable DO-160 revision, section, and category
• Required temperature conditions and variation profile
• Pressure-altitude requirements, if applicable
• EUT dimensions, weight, and heat dissipation
• Operating state during each test stage
• Required power and signal feedthroughs
• Temperature and pressure monitoring requirements
• Test data and reporting expectations
• Safety requirements and special test hazards
• Chamber installation space and utilities
• Calibration, acceptance testing, and service requirements
If any parameter has not yet been finalized, identify it as an open engineering requirement instead of allowing the supplier to assume a value.
TestEQ Environmental Test Chamber Solutions
TestEQ provides environmental test chamber systems for laboratory testing, reliability validation, and customized environmental simulation.
Depending on the qualification requirements, the relevant equipment may include:
• Temperature test chambers
• Temperature variation and thermal cycling chambers
• Temperature-humidity test chambers
• Temperature-altitude chambers
• Customized environmental simulation systems
The appropriate configuration depends on the applicable DO-160 section, temperature profile, pressure requirements, EUT dimensions, operating interfaces, and data acquisition needs.
TestEQ can work with engineering and procurement teams to review these requirements and determine a suitable chamber configuration. The final specification should be confirmed against the customer's applicable qualification plan.
For combined temperature and altitude applications, see the Temperature Altitude Chamber.
For temperature variation applications, see the Thermal Cycling Chamber.
For the full standard framework, read the RTCA DO-160 Environmental Testing Guide.
Why Choose TestEQ for RTCA DO-160 Temperature Testing?
TestEQ provides advanced environmental test chambers designed to support RTCA DO-160 temperature qualification requirements for aerospace electronics, avionics systems, and airborne equipment.
Our temperature testing solutions help engineers verify product reliability under extreme thermal conditions while improving testing accuracy, repeatability, and certification efficiency.
Key Advantages:
Aerospace-Focused Environmental Simulation Technology
TestEQ chambers are engineered for demanding aerospace reliability applications, including avionics, aircraft electronics, UAV systems, and defense equipment testing.
Precise Temperature Control and Uniformity
Advanced PID control technology ensures stable temperature regulation, excellent chamber uniformity, and reliable test repeatability during RTCA DO-160 qualification procedures.
Customized RTCA DO-160 Test Solutions
From compact benchtop chambers to large walk-in environmental chambers, TestEQ provides customized solutions based on specimen size, temperature range, airflow requirements, and testing profiles.
Reliable Long-Term Testing Performance
Designed for continuous operation, TestEQ environmental chambers provide stable performance during extended aerospace qualification testing and laboratory validation.
Complete Engineering Support
TestEQ supports customers with chamber selection, test configuration, installation guidance, calibration coordination, and technical service.
Frequently Asked Questions (FAQ)
1.What is RTCA DO-160 Temperature Testing?
It evaluates airborne equipment under the applicable temperature-related environmental conditions specified by RTCA DO-160. The test procedure and severity depend on the relevant section, category, and qualification plan.
2.Which DO-160 section covers temperature and altitude?
Section 4 of DO-160G covers Temperature and Altitude. It addresses environmental conditions relevant to airborne equipment under the applicable temperature and pressure-altitude requirements.
3.Which DO-160 section covers temperature variation?
Section 5 of DO-160G addresses Temperature Variation. The applicable test profile should be taken from the relevant standard and approved qualification requirements.
4.Is DO-160 temperature testing the same as thermal shock testing?
No. They should not be treated as equivalent. Temperature variation testing follows the applicable DO-160 requirements, while thermal shock testing follows its own specified test method and transition conditions.
5.What temperature range is required for DO-160 testing?
There is no single temperature range that applies to every airborne product. The required conditions depend on the applicable section, category, installation environment, and qualification plan.
6.Does DO-160 temperature testing require altitude simulation?
Not every temperature-related test requires altitude simulation. Section 4 specifically addresses Temperature and Altitude, so the need for pressure control depends on the applicable test requirements.
7.What should I specify when purchasing a DO-160 temperature chamber?
Specify the applicable DO-160 section and category, temperature profile, EUT dimensions and operating state, monitoring requirements, and any pressure-altitude or humidity conditions. Also define safety, calibration, and reporting requirements.
8.Can one chamber support multiple DO-160 test programs?
Potentially, if the chamber's operating envelope, performance, configuration, and monitoring capabilities satisfy the requirements of each applicable test program. This must be verified for the actual profiles rather than assumed from the chamber's temperature range alone.
Internal Linking Module
Related Products
Supports programmable fast temperature transitions for aerospace qualification and accelerated reliability testing.
Simulates combined temperature and humidity environments for avionics and electronic equipment validation.
Related Standards
International environmental testing methods covering temperature, humidity, vibration, and mechanical stress.
U.S. military environmental qualification standard for defense and aerospace equipment.
Related Resources
Compare testing principles, applications, and chamber selection for aerospace and electronics reliability.
Learn how engineers select the right chamber based on standards, specimen size, and testing objectives.
Explore environmental simulation technologies for aircraft, avionics, UAVs, and defense electronics.
CTA
Request an RTCA DO-160 Test Chamber Proposal
Planning an airborne equipment qualification program?
Share your applicable DO-160 section and category, required temperature profile, EUT dimensions, operating conditions, and any pressure-altitude requirements with the TestEQ engineering team.
TestEQ can review the requirements and propose a suitable environmental test chamber configuration for your application.
"Contact TestEQ today" to discuss your RTCA DO-160 testing requirements and receive a customized environmental testing solution.
