English Product Name

Overview

The OK-TH Series Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for accelerated environmental stress testing under precisely regulated thermal and hygrothermal conditions. Designed in accordance with fundamental principles of thermodynamic equilibrium and psychrometric control, the chamber employs a dual-stage compression refrigeration cycle coupled with PID-controlled steam humidification and electric heater modulation to maintain stable setpoints across wide operational ranges. Its architecture supports both steady-state (constant temperature/humidity) and dynamic (cycling) test profiles—critical for evaluating material integrity, electronic component reliability, coating adhesion, and packaging barrier performance under simulated real-world climatic exposure. The system complies with core international environmental test standards including IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-78 (steady-state damp heat), and IEC 60068-2-30 (cyclic damp heat), as well as corresponding national implementations such as GB/T 2423.1–2423.4 and GJB 150.3–150.4. It serves as a foundational platform for product qualification, design validation, and conformance testing in aerospace, automotive electronics, medical device manufacturing, and industrial R&D laboratories.

Key Features

• Hermetically sealed dual-stage refrigeration system using environmentally compliant refrigerants R404A (primary stage) and R23 (sub-zero secondary stage), enabling reliable operation down to −70 °C without cryogenic consumables.
• SUS#304 stainless steel construction for both inner and outer chambers ensures long-term corrosion resistance, cleanroom compatibility, and compliance with ISO 14644-1 particulate control requirements.
• Multi-layer insulated observation window with integrated indium tin oxide (ITO) conductive film prevents condensation and enables unobstructed, high-contrast visual monitoring during high-humidity or sub-zero tests.
• Intelligent touchscreen controller with real-time data logging, programmable multi-step profiles, and automatic fault detection—including over-temperature, over-humidity, compressor overload, and sensor failure—with immediate power cutoff and on-screen diagnostic codes.
• Dual-seal door assembly featuring high-tensile silicone gaskets and magnetic latching provides leak-tight integrity (<0.5 Pa·m³/s helium leak rate), essential for maintaining humidity stability and minimizing energy drift.
• Standard 50 mm diameter feedthrough port (left-side mounted) allows safe integration of external instrumentation, power feeds, or signal lines while preserving chamber seal integrity.

Sample Compatibility & Compliance

The OK-TH chamber accommodates samples ranging from small PCB assemblies to full-size automotive control units or pharmaceutical packaging prototypes. Internal volume options—from 80 L to 1000 L—support scalable test configurations without compromising uniformity. All models meet the spatial uniformity requirements specified in IEC 60068-3-5 (±0.5 °C temperature deviation, ±2.5 %RH humidity deviation across working volume). The chamber’s mechanical and electrical design conforms to IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions), ensuring electromagnetic compatibility in shared lab environments. For regulated industries, optional audit-ready firmware supports 21 CFR Part 11-compliant user access control, electronic signatures, and immutable test record generation—fully traceable to GLP and GMP documentation workflows.

Software & Data Management

The embedded controller supports local data storage (≥10,000 hours of 1-second interval logging) and USB export of CSV-formatted time-series records (temperature, humidity, setpoint, alarm status). Optional PC-based software (OK-Link™) enables remote monitoring via Ethernet, real-time graphing, comparative analysis across multiple test runs, and automated report generation in PDF/Excel formats. All logged data includes timestamp, operator ID, chamber ID, and calibration certificate traceability—satisfying ISO/IEC 17025 clause 7.7 requirements for measurement uncertainty documentation and data integrity assurance.

Applications

• Accelerated aging of polymer composites, elastomers, and adhesive bonds under combined thermal cycling and humidity ingress.
• Functional validation of automotive ECUs, infotainment modules, and ADAS sensors per ISO 16750-4 environmental stress protocols.
• Stability testing of active pharmaceutical ingredients (APIs) and primary packaging per ICH Q1A(R2) guidelines.
• Qualification of military-grade electronics per MIL-STD-810H Method 502.7 (low temperature), Method 501.7 (high temperature), and Method 507.6 (humidity).
• Testing of consumer appliance control boards, display panels, and battery management systems under extended high-RH exposure.

FAQ

What temperature and humidity accuracy can be expected during prolonged steady-state operation?

Under standard operating conditions (25 °C / 60 %RH), the chamber maintains long-term stability within ±0.5 °C and ±2.0 %RH (k = 2), verified by NIST-traceable reference sensors calibrated annually.

Is the system suitable for HALT or HASS applications?

While optimized for qualification-grade environmental profiling, the OK-TH series is not designed for rapid thermal transients (>15 °C/min) or vibration coupling; it is intended for compliance testing—not accelerated life testing.

Can the controller interface support third-party SCADA or MES integration?

Yes—via Modbus TCP (standard) or optional OPC UA protocol, enabling bidirectional communication with enterprise-level manufacturing execution systems.

What maintenance intervals are recommended for the refrigeration system?

Compressor oil and filter dryer replacement every 24 months; refrigerant charge verification and leak inspection every 12 months—documented in the included maintenance logbook.

Are calibration certificates provided with shipment?

Each unit ships with a factory calibration report (temperature/humidity at three points: low/mid/high range), traceable to national metrology institutes (NMI), and valid for 12 months from date of issue.