OK OK-STH-4m2.0000 Walk-in Environmental Test Chamber

Overview

The OK OK-STH-4m2.0000 Walk-in Environmental Test Chamber is an industrial-grade, fully enclosed climatic test facility engineered for precise, repeatable, and long-duration environmental simulation of large-scale equipment, subsystems, or complete assemblies. Designed according to ISO 16750-4 (Road vehicles — Environmental conditions and testing for electrical and electronic equipment), IEC 60068-2 series (Environmental testing), and ASTM D4332 (Standard Practice for Conditioning Containers, Packages, or Packaging Components for Testing), this chamber employs a dual-loop PID-controlled air handling system with independent refrigeration and steam-based humidification circuits. Its robust thermal envelope—constructed from high-density polyurethane-insulated sandwich panels—ensures minimal thermal bridging and stable chamber dynamics under sustained operational loads. The chamber supports both steady-state and programmable ramp-hold profiles, enabling compliance verification for automotive ECUs, aerospace avionics enclosures, energy storage systems, and medical device packaging under extreme ambient conditions.

Key Features

• Structural integrity: Double-skin color-coated steel panels with 70–100 mm thick rigid polyurethane core (thermal conductivity ≤ 0.022 W/m·K); fire performance rated B2 per GB 8624–2012 (Chinese national standard equivalent to EN 13501–1 Class D-s2,d0)
• Reinforced support frame: Galvanized steel structural skeleton with aluminum extrusion edge trims and silicone-sealed panel joints for leak-tight integrity (air leakage rate < 0.5 ACH at 25 Pa differential pressure)
• Intelligent climate control: Dual-stage refrigeration system with automatic circuit selection; electric steam humidifier with deionized water feed and condensate recovery; full PID algorithm with auto-tuning capability
• Human-machine interface: 10.4″ TFT-LCD touchscreen controller (OK proprietary firmware) supporting up to 99 segments/500 steps in programmable cycles; optional OYO 5461 or 7751 controllers available per customer specification
• Safety architecture: Triple-redundant protection including overtemperature cut-off (mechanical & electronic), phase-loss detection, low-water-level interlock, ground-fault circuit interrupter (GFCI), and door-mounted emergency stop
• Audible noise level: ≤75 dB(A) at 1 m distance during full-load operation, compliant with ISO 7779 and GB/T 18697–2002

Sample Compatibility & Compliance

The OK-STH-4m2.0000 accommodates full-size test specimens up to 1.5 m deep × 1.8 m wide × 1.5 m high—ideal for automotive instrument clusters, server racks, HVAC units, battery modules, and military-grade enclosures. Its interior features non-reflective stainless steel walls, removable floor grating (optional epoxy-coated concrete base), and integrated cable ports with IP65-rated gland plates. All electrical components meet CE marking requirements under the Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU). The chamber’s temperature uniformity (±2 °C) and stability (±1 °C) are validated per IEC 60068-3-5 and verified using NIST-traceable PT100 sensors at nine standardized spatial locations during IQ/OQ protocols.

Software & Data Management

The embedded controller logs real-time temperature and humidity data at user-configurable intervals (1–600 seconds) and stores ≥30 days of historical records internally. Optional Ethernet or RS485 interfaces enable integration with SCADA platforms (e.g., Siemens Desigo, Ignition) or LIMS environments. For regulated industries, optional FDA 21 CFR Part 11-compliant software packages provide electronic signatures, audit trails, role-based access control, and PDF report generation—including deviation alerts, calibration status flags, and test cycle metadata. Data export formats include CSV, XML, and PDF; all timestamps are synchronized via NTP servers.

Applications

• Automotive: Thermal shock testing of ADAS sensor housings per ISO 16750-4; humidity cycling of infotainment systems per LV 124
• Aerospace: Environmental stress screening (ESS) of avionics line-replaceable units (LRUs) per RTCA DO-160G Section 4 & 5
• Energy: Cycle testing of lithium-ion battery packs under combined thermal and humidity stress (IEC 62660-2, UL 1642)
• Medical: Accelerated aging of sterile barrier systems per ISO 11607-1 and packaging validation per ASTM F1980
• Industrial electronics: Burn-in and HALT precursor testing for power converters, motor drives, and PLC cabinets

FAQ

What is the maximum allowable load weight inside the chamber?
The reinforced floor structure supports distributed static loads up to 800 kg/m²; point loads exceeding 150 kg require localized steel plate reinforcement.
Can the chamber be configured for salt fog or UV exposure integration?
No—this model is dedicated to temperature and humidity simulation only. Salt spray or UV functionality requires separate ISO 9227 or ISO 4892-3 compliant chambers.
Is remote monitoring possible without on-site IT infrastructure?
Yes—via optional 4G LTE cellular modem with secure MQTT communication to cloud dashboards; no local network required.
Does the system include factory calibration documentation?
Yes—each unit ships with a Certificate of Conformance and a NIST-traceable calibration report for primary sensors, valid for 12 months post-shipment.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil and filter-drier replacement every 24 months; annual inspection of refrigerant charge and heat exchanger cleanliness per ASHRAE Guideline 3-2021.