Generic Brand OK-TH Series High-Low Temperature Cycling Environmental Test Chamber

Overview

The OK-TH Series High-Low Temperature Cycling Environmental Test Chamber is a precision-engineered climatic simulation system designed for accelerated aging, thermal stress screening, and environmental qualification of electronic components, aerospace hardware, automotive modules, and polymer-based materials. Based on forced-air convection and dual-stage refrigeration architecture, the chamber delivers tightly controlled temperature and humidity profiles across wide operational ranges—from deep cryogenic conditions (-70 °C) to high-temperature exposure (+150 °C), with programmable cycling capability between defined setpoints. Its design adheres to fundamental thermodynamic principles of heat transfer and psychrometric control, enabling reproducible simulation of real-world environmental extremes encountered during product transport, storage, and field operation. The chamber serves as a foundational tool in reliability engineering workflows, supporting failure mode identification, life-cycle prediction, and design validation under ISO 16750, MIL-STD-810, and IEC 60068-2 series test protocols.

Key Features

• Full-enclosure SUS#304 stainless steel construction ensures corrosion resistance, long-term dimensional stability, and compliance with cleanroom-compatible surface finish requirements.
• High-resolution 7-inch color touch-screen controller with intuitive GUI supports bilingual (English/Chinese) interface, multi-segment ramp-soak programming, and real-time trend logging.
• Dual-stage cascade refrigeration system using environmentally compliant R404A/R23 refrigerants enables stable operation at -70 °C without liquid nitrogen dependency.
• Multi-layer insulated observation window with integrated conductive film prevents condensation and maintains optical clarity throughout humidity cycles.
• Double-lip high-tensile silicone gasket sealing between door and chamber body achieves leak rates <1.0 × 10⁻³ mbar·L/s, critical for maintaining humidity integrity during cyclic tests.
• Integrated safety architecture includes over-temperature cutoff, compressor high-pressure shutdown, phase-failure protection, and real-time fault diagnostics with on-screen error code display.
• Standard 50 mm diameter feedthrough port (left-side mounted) accommodates sensor wiring, power leads, or pneumatic tubing—sealed with removable silicone plug when unused.

Sample Compatibility & Compliance

The OK-TH chamber accommodates samples ranging from PCB assemblies and battery cells to coated metal substrates and elastomeric seals. Internal volume options (80 L to 1000 L) support both component-level qualification per IPC-J-STD-020 and full-system thermal shock testing. It meets mandatory environmental test requirements outlined in GJB 150.3–1986 (high-temperature), GJB 150.4–1986 (low-temperature), GB/T 2423.1–2001 (cold), GB/T 2423.2–2001 (dry heat), GB/T 2423.4–1993 (damp heat cycling), and IEC 60068-2-14 (change of temperature). Optional humidity control satisfies IEC 60068-2-78 (steady-state humid heat) and IEC 60068-2-30 (cyclic damp heat). All models are CE-marked and manufactured under ISO 9001-certified quality management systems; documentation packages include factory calibration certificates traceable to NIST standards.

Software & Data Management

The embedded controller provides local data logging at user-defined intervals (1–600 seconds), storing up to 100 test programs with 99 segments each. USB export functionality enables CSV-formatted time-series datasets (temperature, humidity, setpoint, alarm status) for post-test analysis in MATLAB, Python, or statistical process control platforms. Optional PC-based software (OK-Link v3.2) adds remote monitoring, email/SMS alerting on deviation events, audit trail generation per FDA 21 CFR Part 11 (with electronic signature support), and automated report generation compliant with GLP/GMP documentation requirements. All firmware updates are delivered via encrypted USB key to maintain system integrity.

Applications

• Thermal cycling validation of solder joints and wire-bond interconnects in automotive ECUs per AEC-Q200.
• Accelerated aging of lithium-ion battery electrolytes and SEI layer formation studies under variable T/RH profiles.
• Coating adhesion assessment (e.g., powder coatings, conformal lacquers) following ASTM D3359 and ISO 2409 after humidity preconditioning.
• Plastic part warpage analysis in injection-molded housings exposed to thermal gradients mimicking end-use environments.
• Reliability screening of LED drivers and optoelectronic modules per JEDEC JESD22-A104 (temperature cycling) and JESD22-A110 (highly accelerated stress test).
• Environmental stress screening (ESS) of avionics subassemblies prior to HALT/HASS execution.

FAQ

What temperature and humidity accuracy specifications are guaranteed over the full operating range?

Temperature uniformity is maintained at ±0.5 °C (measured per IEC 60068-3-5), and humidity uniformity at ±2.5 %RH (per IEC 60068-3-6), verified at nine spatial locations during factory acceptance testing.

Is the chamber compatible with external data acquisition systems via analog or digital interfaces?

Yes—standard 4–20 mA analog outputs (temperature, humidity) and optional RS485 Modbus RTU interface enable integration with SCADA, PLC, or centralized lab monitoring networks.

Can the unit be configured for non-standard temperature ranges such as -85 °C or +200 °C?

Custom configurations are available upon request; however, standard models are certified only for the published ranges (-70 °C to +150 °C). Extended-range variants require additional thermal insulation, modified compressor staging, and recalibration per ISO/IEC 17025.

Does the controller support profile replication from external test standards (e.g., MIL-STD-810H Method 502.6)?

Pre-loaded test templates include MIL-STD-810H, IEC 60068-2-14, and GB/T 2423.22; users may also import custom CSV-defined profiles with time/setpoint columns.

What maintenance intervals are recommended for optimal long-term performance?

Compressor oil and filter replacement every 24 months; refrigerant charge verification annually; door gasket inspection and cleaning quarterly; full system calibration recommended biannually or after 500 operational hours.