OK-TS-49.5 Wind-Cooled Thermal Shock Test Chamber

Overview

The OK-TS-49.5 Wind-Cooled Thermal Shock Test Chamber is an engineered environmental test system designed for rapid, repeatable thermal cycling between extreme temperature extremes. It operates on the principle of three-zone air-impingement thermal shock: high-temperature storage, low-temperature storage, and a central test zone where specimens are positioned. During testing, pneumatic or servo-driven transfer mechanisms rapidly move samples between hot and cold zones—enabling transition times under 15 seconds—as defined by IEC 60068-2-14, MIL-STD-810H Method 503.5, and GB/T 2423.22. Unlike liquid-immersion or single-chamber ramp-based systems, this tri-zone architecture eliminates thermal inertia in the test space, ensuring true step-change exposure critical for evaluating solder joint integrity, polymer embrittlement, sealant adhesion loss, and intermetallic growth in electronic assemblies.

Key Features

• Wind-cooled refrigeration architecture: Dual-stage or cascade compressors paired with finned-tube air-cooled condensers and high-volume axial fans—eliminating dependency on external water supply or chiller infrastructure.
• Triple-compartment design: Independent +150 °C hot zone (electric heating), −40 °C cold zone (refrigerant-based cooling), and neutral test chamber with ISO Class 5-grade airflow uniformity (±1.5 °C across 49.5 L working volume).
• High-speed thermal transfer: Pneumatically actuated lift-and-shift mechanism achieves ≤15-second zone-to-zone transit time—verified per ASTM F1879 Annex A2 for semiconductor package qualification.
• Robust thermal stability: ±2 °C steady-state tolerance maintained over 24-hour dwell periods, supported by PID-controlled resistive heaters, expansion valve modulation, and redundant PT100 sensor arrays.
• Front-access maintenance layout: Condenser coils mounted externally at rear/top with tool-free access panels; recommended cleaning interval: every 3 months in ISO Class 8 lab environments.
• Integrated safety architecture: Dual independent overtemperature cutoffs (mechanical & digital), compressor high-pressure shutdown, and door-interlocked power cut-off compliant with EN 61000-6-2 EMC and UL 61010-1.

Sample Compatibility & Compliance

The OK-TS-49.5 accommodates standard JEDEC trays (up to 300 × 300 mm footprint), PCB assemblies (max. 25 kg), automotive ECUs, optical housings, and medical device enclosures. Its internal dimensions (W×D×H: 350 × 350 × 400 mm) support full IEC 60068-2-14 specimen loading without airflow obstruction. All thermal profiles—including dwell time, transition count, and soak duration—are programmable and auditable per FDA 21 CFR Part 11 requirements when used with optional OK-LogPro software (see below). The chamber meets ISO/IEC 17025 traceability standards for temperature calibration, with factory-certified NIST-traceable validation reports available upon request.

Software & Data Management

Controlled via OK-LogPro v3.2—a Windows-based HMI platform supporting multi-user role assignment (Operator, Engineer, QA Auditor), real-time graphing of up to 8 thermocouple channels, and automated report generation in PDF/XLSX formats. All setpoint changes, alarm events, and manual interventions are timestamped and digitally signed, fulfilling GLP/GMP audit trail requirements. Optional Ethernet/IP or Modbus TCP integration enables centralized monitoring within LabVantage or Siemens Desigo CCMS environments. Raw data logs (CSV) retain millisecond-resolution timestamps and are stored locally on encrypted SSD with configurable auto-archiving to network shares.

Applications

• Qualification of consumer electronics per JEDEC JESD22-A104E (Temperature Cycling) and A106B (Thermal Shock).
• Reliability screening of aerospace avionics under MIL-STD-810H Condition I (−55 °C to +125 °C).
• Failure analysis of battery modules subjected to repeated charge/discharge-induced thermal gradients.
• Material compatibility testing for medical device sterilization packaging (ISO 11607-1 accelerated aging protocols).
• Validation of conformal coating performance on printed circuit boards under cyclic thermal stress.

FAQ

What ambient conditions are required for rated performance?
The published −40 °C low-temperature capability and ≤15-second transition rates are validated at 23 ±2 °C ambient with ≥1 m clearance on all sides and unobstructed airflow above the condenser. Performance degrades above 30 °C ambient due to elevated condensing pressure.
Is water cooling possible as a retrofit?
No—the OK-TS-49.5 is structurally optimized for air-cooled operation. Retrofitting water cooling would require replacement of the entire refrigeration subassembly, condenser manifold, and control logic—rendering it economically nonviable versus selecting a water-cooled variant (e.g., OK-TS-WC-49.5) at time of order.
How often must the condenser be cleaned?
In ISO Class 8 cleanrooms, quarterly cleaning suffices. In industrial labs with particulate loads >10⁵ particles/m³ (≥0.5 µm), monthly vacuuming and compressed-air blowout of fins is recommended to prevent airflow restriction and high-pressure shutdowns.
Does the chamber support custom thermal profiles?
Yes—via OK-LogPro’s script editor, users define dwell times, ramp rates, cycle counts, and conditional branching (e.g., “if TC#3 exceeds +145 °C, pause and alert”). Profiles export as .tsf files for cross-platform replication.
What calibration documentation is included?
Each unit ships with a factory calibration certificate (NIST-traceable reference sensors), as-found/as-left data for all 6 critical thermocouples, and uncertainty budgets per ISO/IEC 17025 Clause 6.5. On-site IQ/OQ services are available separately.