Custom HASA & Environmental Chamber Test Fixtures

Custom HASA (Highly Accelerated Stress Audit) and Environmental Chamber Test Fixture is an ultra-specialised validation platform built to endure simultaneous thermal and mechanical stress. To guarantee electronics can survive extreme field conditions, testing profiles require boards to undergo violent mechanical shaking while concurrently being driven up and down aggressive temperature spectrums. Designing a fixture for this environment introduces a major engineering challenge: mismatched thermal expansion can cause the fixture to fight the PCB, resulting in bent test pins, broken traces, or false failures.

This fixture eliminates artificial testing stresses by utilising specialised composite and structural materials with a Coefficient of Thermal Expansion (CTE) precisely matched to the PCB. This ensures that as the temperature swings rapidly from extreme sub-zero cold to intense heat, both the fixture and the circuit board expand and contract at the same rate. This preserves perfect alignment, prevents board warping, and guarantees that every test probe remains centred on its microscopic test pad throughout active vibration cycles.

Key Features & Technical Highlights

• Matched CTE Material Engineering: Constructed using advanced, temperature-stable laminates and glass-epoxy composites with a thermal expansion rate identical to standard substrates, preventing thermal-induced shear stress on the board under test.

• Combined Stress Audit (HASA) Capability: Explicitly structural-engineered to withstand continuous, high-G multi-axis vibration profiles on a shaker table while operating inside a rapid-rate climate chamber.

• Unwavering Probe-to-Pad Alignment: Because the fixture expands at the same rate as the PCB, precision pogo pins maintain their position, eliminating the risk of probes slipping off test pads during thermal transitions.

• High-Fidelity Shielded Signal Routing: Outfitted with heavy-duty, ultra-flexible thermal wiring harnesses designed to remain compliant at sub-zero temperatures, completely preventing wire stiffness, cracking, or signal noise during high-vibration sweeps.

• Condensation & Frost Protection: Integrates moisture-resistant barriers, sealed connector blocks, and localised drainage pathways to insulate critical measurement channels from the short circuits caused by rapid thawing and freezing.

Applications

This high-reliability HASA fixture platform is essential for production quality audits, Highly Accelerated Life Testing (HALT), and Environmental Stress Screening (ESS) of mission-critical electronics, including automotive engine control units (ECUs), aerospace navigation hardware, defence systems, and outdoor telecom transceivers.