OK Environmental Systems OK-STH-8.6m² Walk-in Temperature & Humidity Test Chamber

Overview

The OK-STH-8.6m² Walk-in Temperature & Humidity Test Chamber is a fully engineered environmental simulation system designed for system-level reliability validation under controlled climatic conditions. Built on the principles of forced-air convection, precision PID-controlled heating/cooling, and saturated steam humidification, this chamber provides stable, repeatable, and spatially uniform thermal-hygrometric environments across its 8.6 m² internal footprint (2000 mm × 2000 mm × 2000 mm). Unlike benchtop or upright chambers, its walk-in architecture enables direct human access for instrumentation, cabling, real-time diagnostics, and in-situ adjustments—critical for testing large-format assemblies such as electric vehicle powertrains, aerospace avionics racks, grid-scale battery energy storage systems (BESS), and telecom server cabinets. The chamber conforms to core environmental test standards including ISO 16750-4 (road vehicles), MIL-STD-810H (Method 501.7/502.7), IEC 60068-2-1/2/14/30, and supports compliance workflows aligned with GLP and GMP documentation requirements.

Key Features

• Modular structural design using 150 mm thick double-skinned PU-insulated panels with tongue-and-groove joints and stainless-steel corner reinforcements—ensuring long-term dimensional stability and thermal integrity.
• Cascade refrigeration system with independent high-temperature and low-temperature compressor stages, enabling operation down to −70°C while maintaining ≤±3°C temperature uniformity per IEC 60068-3-5.
• Electrically heated, double-glazed observation door with mechanical safety interlock and anti-frost heater—preventing condensation during low-temperature operation and ensuring operator visibility and safety.
• High-efficiency axial-centrifugal hybrid air circulation system with adjustable vanes and calibrated velocity profiling—validated to deliver ≤±1.5°C vertical/horizontal gradient across the working volume.
• Integrated steam humidification module with deionized water reservoir, PID-controlled saturation control, and condensate management—achieving 20–98% RH range with ±3% RH accuracy at steady state.
• Industrial PLC controller (Siemens S7-1200 platform) featuring 10.4″ resistive touchscreen, up to 99 programmable test segments, 10,000-point internal data logging, and native Modbus TCP/Ethernet/IP connectivity for SCADA integration.

Sample Compatibility & Compliance

The OK-STH-8.6m² accommodates physically large, electrically active, or thermally dissipative test articles—including full EV battery modules (up to 2.5 m tall), photovoltaic inverters with active cooling, aircraft flight control units, and rack-mounted 5G baseband equipment. Its load compensation algorithm adjusts refrigeration output in real time based on user-defined internal heat dissipation (up to 15 kW), preventing thermal drift during powered-on testing. All electrical components comply with IEC 61000-6-3 (EMI) and IEC 61000-6-2 (immunity). The control software supports 21 CFR Part 11-compliant electronic signatures, role-based user permissions, and immutable audit trails—facilitating FDA-regulated validation protocols and ISO/IEC 17025 laboratory accreditation.

Software & Data Management

The embedded OK-EnviroControl™ software suite offers full-cycle test lifecycle management: profile creation (ramp-soak-cycling), live parameter visualization (temperature/humidity/time plots), automated report generation (PDF/CSV), and alarm-triggered email/SMS notifications. Historical data is stored in SQLite format with SHA-256 checksum verification; exports include timestamped metadata, calibration certificates, and operator IDs. Optional cloud gateway enables secure TLS 1.3 transmission to AWS IoT Core or Microsoft Azure IoT Hub for centralized fleet monitoring and predictive maintenance analytics.

Applications

• Automotive: Cold-start validation of ADAS ECUs at −40°C; thermal cycling of 800V battery packs per GB/T 31467.3; HVAC performance mapping under combined hot-humid (40°C/95% RH) conditions.
• Aerospace: Environmental stress screening (ESS) of UAV flight controllers per DO-160G Section 4; thermal vacuum pre-screening support via optional LN₂ rapid cooldown.
• Energy Storage: Calendar and cycle life testing of lithium iron phosphate (LFP) BESS cabinets under IEEE 1679.2-recommended temperature profiles.
• Electronics Manufacturing: HALT/HASS readiness assessment for 5G mmWave RF front-end modules; burn-in qualification per JEDEC JESD22-A108.
• Academic & Government Research: Climate resilience testing of smart grid infrastructure; material aging studies under ASTM D4329 UV+condensation + thermal cycling co-stress protocols.

FAQ

What is the standard lead time for factory acceptance testing (FAT) and site commissioning?
Standard FAT requires 6–8 weeks post-order confirmation; on-site installation, leak testing, and performance validation (per IEC 60068-3-5) add 3–5 business days.
Can the chamber be configured for IP54-rated internal instrumentation ports?
Yes—customizable cable entry glands (M25/M32) with silicone sealing boots and grounding lugs are available upon request.
Is remote firmware update supported over secure VPN?
Yes—the controller supports signed OTA updates via OpenVPN tunnel with certificate-based authentication.
Does the system meet CE marking requirements for machinery directive 2006/42/EC?
Yes—full CE documentation package (DoC, risk assessment, wiring diagrams) is supplied with each unit.
How is humidity calibration traceability maintained?
Factory calibration uses NIST-traceable chilled-mirror hygrometers (Michell Instruments OptiLog); annual recalibration services include uncertainty budgets per ISO/IEC 17025.