OK-TS-6.6 Liquid Thermal Shock Test Chamber

Overview

The OK-TS-6.6 Liquid Thermal Shock Test Chamber is an engineered environmental reliability testing system designed for accelerated thermal stress evaluation of electronic components, automotive modules, aerospace hardware, and advanced materials under rapid, extreme temperature transitions. Unlike gas-based thermal shock chambers that rely on forced convection in air, this system employs dual independent liquid baths—typically filled with high-stability silicone oil or inert fluorinated fluids—to achieve superior heat transfer coefficients. Its operational principle follows the two-bath immersion method: a test specimen mounted on a motorized lift basket is transferred between a heated bath (+150 °C) and a cooled bath (−50 °C) in ≤15 seconds, subjecting the sample to abrupt thermal gradients exceeding 200 °C per transition. This methodology replicates real-world thermal transients encountered during aircraft takeoff/landing, automotive under-hood cycling, or satellite orbital thermal loading—conditions where interfacial thermal resistance and coefficient-of-thermal-expansion (CTE) mismatch drive failure mechanisms such as solder joint fatigue, delamination, or microcrack propagation.

Key Features

• Dual-bath immersion architecture with independently controlled high-temperature and low-temperature liquid reservoirs
• Precision servo-driven transfer mechanism enabling repeatable basket motion with ≤12-second transition time between baths
• Thermal stability maintained at ±2 °C across both baths under dynamic load conditions
• Uniform liquid temperature distribution achieved via submerged circulation pumps and calibrated platinum RTD sensors (Class A tolerance)
• Configurable dwell time (1 min to 999 min per bath) and cycle count (1 to 9999 cycles), programmable via touchscreen HMI
• Integrated safety interlocks including liquid level monitoring, overtemperature cutoff, emergency stop circuitry, and leak detection sensors
• Optional inert atmosphere purging (N₂) for oxygen-sensitive samples or low-volatility fluid handling

Sample Compatibility & Compliance

The OK-TS-6.6 is intended for non-porous, solid-state components resistant to immersion in dielectric, non-reactive thermal fluids—such as silicone oils meeting Dow Corning DC-704 specifications or 3M Fluorinert™ FC-72. It is unsuitable for hygroscopic, porous, or chemically reactive specimens (e.g., lithium-ion battery cells without hermetic sealing, uncoated PCBs with flux residues, or organic coatings). The chamber supports test protocols aligned with MIL-STD-883 Method 1010.8 (Temperature Cycling), GJB 150.5A-2012 (Environmental Testing for Military Equipment), and IEC 60068-2-14:2016 (Change of Temperature). All control logic and data logging comply with GLP/GMP traceability requirements, including audit trail generation, user access levels, and electronic signature support per FDA 21 CFR Part 11 when paired with optional software packages.

Software & Data Management

Equipped with OK-TestControl v3.2 firmware, the chamber provides real-time monitoring of bath temperatures, basket position status, cycle progression, and alarm history. Data export is supported in CSV and XML formats, with timestamps traceable to UTC via NTP synchronization. Optional OK-DataVault software enables centralized fleet management, remote diagnostics, automated report generation (PDF/Excel), and integration with LIMS platforms through OPC UA or RESTful API interfaces. All calibration records—including sensor verification logs and thermal mapping reports—are stored with digital signatures and version-controlled metadata.

Applications

• Automotive electronics: Validation of ECUs, radar modules, and EV battery management systems per ISO 16750-4 and AEC-Q200
• Aerospace avionics: Qualification of flight-critical sensors and FPGAs subjected to stratospheric thermal cycling
• Defense systems: Environmental screening of guided munition guidance units per MIL-STD-810H
• Semiconductor packaging: Assessment of wire bond integrity and mold compound adhesion in QFN, BGA, and SiP assemblies
• Advanced ceramics and metal-matrix composites: Evaluation of thermal shock resistance in turbine blade coatings and heat exchanger substrates
• MEMS device reliability: Accelerated life testing of resonators and accelerometers under cyclic thermal strain

FAQ

What types of liquids are compatible with the OK-TS-6.6?

Silicone oils (e.g., Dow Corning 200 Fluid series, viscosity grade 50–100 cSt), fluorinated liquids (e.g., 3M Fluorinert™ FC-40, FC-72), or custom-engineered dielectric heat transfer fluids meeting flash point >200 °C and pour point <−60 °C.
Can the chamber accommodate large or irregularly shaped samples?

Maximum basket dimensions are 300 × 300 × 250 mm (W × D × H); custom baskets and fixture plates are available upon request, subject to fluid volume and thermal mass constraints.
Is post-test cleaning required for samples?

Yes—residual thermal fluid must be removed using approved solvent rinses (e.g., isopropyl alcohol for silicone oil) followed by nitrogen drying to prevent contamination or electrical leakage.
How is temperature uniformity validated within each bath?

Per IEC 60068-3-5, 9-point thermal mapping is performed annually using NIST-traceable PT100 probes; as-built uniformity is ±1.2 °C at steady state.
Does the system support automated test sequencing across multiple chambers?

Yes—via OK-NetLink industrial Ethernet interface and Modbus TCP protocol, enabling synchronized multi-chamber profiles and centralized pass/fail decision logic.