English Product Name

Overview

The OK-TH Series Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for precise, repeatable simulation of climatic conditions in laboratory and industrial quality assurance environments. Designed according to the fundamental principles of thermodynamic equilibrium and psychrometric control, this chamber employs dual-loop PID regulation—separate feedback loops for temperature and humidity—to maintain stable setpoints under dynamic load conditions. Its fully enclosed refrigeration system utilizes cascade compression architecture with R404A (high-temp stage) and R23 (low-temp stage) refrigerants, enabling reliable operation across extended low-temperature ranges down to −70°C. The chamber’s structural integrity is ensured by seamless SUS#304 stainless steel construction, corrosion-resistant insulation, and airtight door sealing—critical for long-term stability during high-humidity exposure and thermal cycling tests. It serves as a foundational platform for environmental stress screening (ESS), reliability validation, and conformance testing per internationally recognized standards.

Key Features

• Modular chamber configurations spanning internal volumes from 80 L to 1000 L (OK-TH-80 through OK-TH-1000), each customizable in internal dimensions to accommodate oversized or irregularly shaped test specimens.
• Dual-sensor humidity control using capacitive RH sensors with NIST-traceable calibration, coupled with precision PT100 temperature probes mounted at multiple spatial locations to support uniformity verification.
• LCD touchscreen controller with real-time graphing, programmable ramp-soak profiles, data logging (up to 10,000 points), and password-protected parameter lockdown—ensuring operator consistency and audit readiness.
• Integrated safety architecture including over-temperature cutoff, compressor high-pressure protection, humidity sensor fault detection, and door-open alarm with automatic power interlock.
• Standardized mechanical interface provisions: one Φ50 mm cable port with silicone gasket, two adjustable stainless-steel shelves, four swivel casters with locking brakes, and four threaded leveling feet for vibration isolation on uneven floors.

Sample Compatibility & Compliance

The OK-TH chamber accommodates a broad spectrum of physical samples—from printed circuit boards (PCBs) and automotive electronic modules to polymer packaging, aerospace composites, and pharmaceutical primary packaging. Its uniformity performance (±0.5°C temperature, ±2.5% RH) meets the spatial homogeneity requirements specified in IEC 60068-3-5 for environmental test chambers. All models are validated against MIL-STD-810G Method 501.6 (High Temperature), Method 502.6 (Low Temperature), Method 507.5 (Humidity), and corresponding Chinese national standards GJB150.3–1986 and GJB150.4–1986. Optional humidity range extensions (5–98% RH) support stringent regulatory testing for medical device sterilization packaging per ISO 11607-1 and accelerated aging per ASTM F1980. The chamber’s design supports GLP-compliant operation when paired with validated software and documented IQ/OQ protocols.

Software & Data Management

The embedded controller supports CSV export of time-stamped temperature/humidity logs via USB interface. For enterprise integration, optional PC-based software provides remote monitoring, multi-chamber synchronization, automated report generation (PDF/Excel), and 21 CFR Part 11–compliant user access control—including electronic signatures, audit trails, and role-based permissions. Data integrity is preserved through cyclic memory buffering and non-volatile storage, ensuring continuity during brief power interruptions. All firmware updates are digitally signed and installed via secure USB media—no internet connectivity required—maintaining network isolation in regulated lab environments.

Applications

• Environmental stress screening (ESS) of electronic assemblies prior to burn-in and functional testing.
• Accelerated life testing of elastomers, adhesives, and sealants under combined thermal-hygrometric loading.
• Validation of packaging barrier performance (e.g., moisture vapor transmission rate) for food, pharma, and medical devices.
• Calibration and verification of portable hygrometers and temperature sensors against reference-grade metrology.
• Material compatibility studies—including solder paste shelf-life assessment, battery electrolyte stability, and composite resin curing behavior.

FAQ

Can the chamber be customized for non-standard internal dimensions or special mounting fixtures?
Yes—OK-TH chambers are offered as semi-custom systems; structural modifications, additional ports, reinforced shelves, or internal lighting can be engineered upon request with formal dimensional and load specifications.

Is third-party calibration certification available?
Yes—NIST-traceable calibration certificates (temperature and humidity) are available as an add-on service, performed by an ISO/IEC 17025-accredited laboratory.

What maintenance intervals are recommended for optimal long-term performance?
We recommend quarterly inspection of condensate drain lines, biannual cleaning of evaporator coils and air filters, and annual verification of refrigerant charge and sensor accuracy—detailed in the included Maintenance Logbook.

Does the controller support Ethernet or RS485 communication for SCADA integration?
The base model includes USB and RS232; optional RS485 Modbus RTU and Ethernet TCP/IP interfaces are available for factory automation and centralized facility monitoring systems.

Are validation documents (IQ/OQ) provided with the system?
Yes—a complete validation package—including template protocols, acceptance criteria, and blank execution records—is supplied. On-site IQ/OQ execution by qualified engineers is available as a separate service engagement.