OK-TH-800 Temperature and Humidity Controlled Environmental Test Chamber

Overview

The OK-TH-800 Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for precise, repeatable simulation of climatic stress conditions in compliance with international environmental testing standards. Designed for reliability in long-duration thermal and hygrothermal cycling, the chamber employs a dual-stage mechanical refrigeration system combined with nickel-chromium tubular heating elements and a stainless-steel steam humidifier to deliver stable, traceable control across its full operational envelope. Its measurement architecture conforms to the fundamental principles of psychrometric equilibrium and convective heat transfer, enabling accurate reproduction of temperature and relative humidity profiles defined in IEC 60068-2, ISO 16750, and MIL-STD-810 test methods. The chamber operates under closed-loop feedback using platinum resistance thermometers (PT100) and capacitive humidity sensors calibrated per ISO/IEC 17025-accredited procedures — ensuring metrological integrity for qualification testing in electronics, automotive components, aerospace materials, and pharmaceutical packaging.

Key Features

• Robust dual-stage refrigeration system with hermetically sealed scroll compressors (TECO or Copeland), optimized for rapid thermal transitions and low-noise operation
• Mirror-finish SUS304 stainless-steel interior chamber and reinforced cold-rolled or brushed stainless-steel exterior housing with 100 mm high-density composite insulation (glass fiber + polyurethane)
• Multi-layer heated observation window with conductive film de-fogging and Philips LED illumination for unobstructed visual monitoring during test execution
• Programmable 7-inch LCD touchscreen controller supporting simultaneous temperature/humidity ramp-soak cycles, multi-segment PID tuning, and real-time graphical display of setpoint vs. actual values
• Integrated load power feedthrough (optional) enabling powered-in situ testing of electronic assemblies under environmental stress
• Comprehensive safety architecture including over-temperature, over-humidity, compressor high-pressure, phase failure, and door interlock protection circuits
• Adjustable centrifugal air circulation system with laminar flow design to minimize thermal gradients and ensure uniform exposure across test specimens

Sample Compatibility & Compliance

The OK-TH-800 accommodates a wide range of sample geometries and mass loads while maintaining specified uniformity and stability. Its internal volume (standard configuration) supports fixtures for PCBs, battery modules, sensor housings, polymer films, and medical device packaging. The chamber meets calibration and performance verification requirements outlined in GB/T 5170.2–2017 (IEC 60068-3-5), GB/T 2423.1–2023 (cold testing), GB/T 2423.2–2023 (dry heat), GB/T 2423.3–2016 (steady-state damp heat), and GB/T 2423.4–2022 (cyclic damp heat). It is routinely validated per ISO/IEC 17025 for uncertainty budgets associated with temperature (k=2, U = ±0.35 °C) and humidity (k=2, U = ±1.2 % RH) at reference points. Optional IQ/OQ documentation packages are available to support GLP, GMP, and FDA 21 CFR Part 11-compliant validation workflows.

Software & Data Management

The embedded controller firmware supports USB-based data logging (CSV format), up to 100 programmable test profiles, and configurable alarm thresholds with timestamped event history. Optional PC-based software (Windows-compatible) enables remote monitoring, automated report generation (PDF/Excel), and integration with LIMS or MES platforms via Modbus TCP or RS485. Audit trails record all parameter modifications, user logins, and alarm acknowledgments — satisfying traceability requirements for regulated industries. All stored data retain integrity through cyclic redundancy checks and non-volatile memory backup, even during unexpected power loss.

Applications

• Accelerated life testing of consumer electronics and automotive ECUs under combined thermal-hygric stress
• Stability assessment of active pharmaceutical ingredients (APIs) and blister-packaged formulations per ICH Q1A(R2)
• Qualification of lithium-ion battery cells under extreme ambient conditions (−40 °C to +85 °C / 10–95 % RH)
• Evaluation of adhesive bond strength retention in structural composites exposed to cyclic humidity
• Environmental screening of optical coatings and MEMS devices for condensation resistance
• Verification of hermetic seal integrity in microelectronic packages using biased damp heat (BDH) protocols

FAQ

What is the standard internal volume of the OK-TH-800 chamber?

Standard configurations include 150 L, 225 L, 408 L, and 800 L working volumes — custom dimensions are available upon request.
Does the chamber support automated test sequencing per IEC 60068-2-30?

Yes — the controller includes preloaded cyclic damp heat profiles compliant with IEC 60068-2-30 Ed. 3.0, with adjustable dwell times, transition rates, and dew point tracking.
Can the OK-TH-800 be integrated into a centralized facility monitoring system?

It supports Modbus RTU/TCP communication protocols and optional Ethernet/WiFi modules for seamless integration with building management systems (BMS) or SCADA platforms.
Is third-party calibration certification included with delivery?

Factory calibration certificates (traceable to NIM or DAkkS-accredited labs) are provided; ISO/IEC 17025-certified calibration services are available as an add-on.
What maintenance intervals are recommended for optimal performance?

Compressor oil and refrigerant analysis every 24 months; humidity sensor recalibration annually; condenser coil cleaning quarterly in dusty environments.