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 hygrometric conditions. Based on the principle of forced-air convection combined with dual-stage refrigeration and PID-controlled steam humidification, it delivers stable, repeatable exposure profiles required for reliability validation across industrial and research applications. Designed to meet the physical boundary conditions defined in major international test standards—including MIL-STD-810G, IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-30 (cyclic damp heat), and GB/T 2423 series—the chamber supports both steady-state and dynamic cycling protocols. Its robust architecture enables continuous operation across extended test durations while maintaining traceable compliance with GLP and pre-GMP laboratory practices.

Key Features

• Full-color 7-inch TFT touchscreen controller with intuitive menu navigation and real-time graphical display of temperature/humidity trends
• Dual-language interface (English/Chinese) supporting multilingual lab environments without firmware modification
• SUS#304 stainless steel inner and outer chamber construction ensures long-term corrosion resistance and cleanroom-compatible surface integrity
• Multi-layer observation window with integrated ITO conductive film prevents condensation and enables unobstructed visual monitoring during high-humidity cycles
• Hermetically sealed, low-noise dual-stage cascade refrigeration system using R404A/R23 refrigerants—fully compliant with current EU F-Gas Regulation (EU) No 517/2014
• Double-gasketed door seal design with high-tensile silicone gaskets maintains chamber integrity at extreme humidity levels up to 98 %RH
• Standard 50 mm test port (left-side mounted) accommodates external signal/power feedthroughs; configurable with optional waterproof gland kits
• Comprehensive safety suite: independent over-temperature cutout, humidity sensor failure detection, refrigerant pressure monitoring, and automatic emergency shutdown with event logging

Sample Compatibility & Compliance

The OK-TH chamber accommodates a wide range of sample geometries—from PCB assemblies and automotive ECUs to polymer specimens and pharmaceutical packaging—within its scalable internal volume options (80 L to 1000 L). All models conform to structural requirements for ISO/IEC 17025-accredited laboratories when operated within validated parameter envelopes. The chamber’s thermal and humidity uniformity (±0.5 °C / ±2.5 %RH) and stability specifications satisfy calibration traceability requirements per ISO/IEC 17025 Clause 6.4.2. It supports full audit trails for test execution metadata—including setpoint history, alarm events, and operator logins—when configured with optional data export modules compatible with FDA 21 CFR Part 11-compliant LIMS integration.

Software & Data Management

While the embedded controller provides standalone operation, optional USB and RS485 interfaces enable seamless data acquisition via third-party SCADA or LabVIEW-based platforms. Logged parameters—including chamber setpoints, actual values, ramp rates, dwell times, and fault codes—are timestamped and exportable in CSV format. Firmware supports user-defined test profiles with up to 99 segments per cycle, including hold, ramp, and soak phases. Remote monitoring capability is available via Ethernet-enabled controllers (model-dependent), permitting secure access through authenticated web interfaces compliant with TLS 1.2 encryption standards.

Applications

• Accelerated aging of electronic components under combined thermal-hygrometric stress (e.g., IPC-J-STD-020, JEDEC JESD22-A104)
• Validation of coating adhesion and substrate compatibility per ASTM D714 and ISO 4628-5
• Material property evaluation: coefficient of thermal expansion (CTE), moisture absorption kinetics, and dimensional stability per ASTM E831 and ISO 11359
• Automotive component qualification per GMW3172, Ford CETP 00.00-L-467, and VW 80101
• Pharmaceutical packaging integrity assessment under climatic zone IVb conditions (ICH Q1A–Q1E)
• Environmental screening of aerospace subsystems per MIL-STD-810H Method 502.7 (low temperature) and Method 507.6 (humidity)

FAQ

What temperature and humidity ranges are standard across all OK-TH models?

All units support a base temperature range of –20 °C to +150 °C and humidity range of 20–98 %RH. Extended low-temperature variants (–40 °C and –70 °C) and ultra-low humidity options (5–98 %RH) are available as factory-configured options.

Is the chamber suitable for use in ISO 17025-certified testing laboratories?

Yes—when operated within its validated performance envelope and maintained per manufacturer-recommended calibration intervals (typically annual thermohygrometer verification and sensor drift checks), the OK-TH chamber meets the equipment suitability criteria outlined in ISO/IEC 17025:2017 Clause 6.4.

Can test data be exported for regulatory submission (e.g., FDA, CE)?

Raw time-series data (setpoint, actual, alarms) is exportable in machine-readable CSV format. For 21 CFR Part 11 compliance, optional software add-ons provide electronic signatures, audit trail generation, and role-based access control—subject to site-specific validation.

What maintenance is required to sustain specified uniformity and accuracy?

Monthly inspection of gasket integrity, quarterly cleaning of condenser coils and humidifier reservoir, and annual recalibration of primary temperature/humidity sensors using NIST-traceable references are recommended per the maintenance schedule in the technical manual.