OK Environmental Test Chamber OK-TH-408

Overview

The OK Environmental Test Chamber OK-TH-408 is a precision-engineered benchtop temperature and humidity controlled chamber designed for accelerated environmental reliability testing of materials and finished products. It operates on the fundamental principles of vapor-compression refrigeration, resistive heating, and steam-based humidification—enabling stable, repeatable simulation of climatic stress conditions across a wide operational envelope. The chamber is engineered for applications requiring compliance with standardized environmental test protocols—including IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-30 (damp heat, cyclic), and ISO 16750-4 (road vehicles). Its air-cooled refrigeration system eliminates dependency on external water cooling infrastructure, while the dual-sensor Pt100 temperature and dry/wet-bulb humidity measurement architecture ensures high reproducibility in both steady-state and dynamic test profiles.

Key Features

• Benchtop footprint with 408 L internal volume (600 × 850 × 800 mm W × H × D), optimized for laboratory space efficiency without compromising test specimen capacity.
• Wide operational range: temperature from –50 °C to +150 °C and relative humidity from 20% to 98% RH—covering critical stress points for polymer aging, electronic component validation, and packaging integrity assessment.
• High-stability control architecture: PID-regulated heating, refrigeration, humidification, and dehumidification subsystems deliver temperature uniformity of ±1 °C (at elevated setpoints) and ±2 °C (at sub-zero conditions), with humidity deviation maintained within ±3% RH.
• Air-circulation system with adjustable axial fans and optimized internal ducting ensures spatial homogeneity—critical for multi-point sensor calibration and comparative material testing per ASTM D4332 or ISO 2231.
• Integrated safety suite includes over-temperature cut-off, low-humidity alarm, water-level monitoring for steam generator, motor overload protection, and earth-leakage circuit interruption—fully compliant with IEC 61000-6-2/6-4 EMC requirements.

Sample Compatibility & Compliance

The OK-TH-408 accommodates diverse sample geometries—from PCB assemblies and battery cells to textile swatches, adhesive coupons, and pharmaceutical blister packs—within its stainless-steel 304 interior chamber. All internal surfaces are electropolished and non-outgassing, minimizing contamination risk during long-duration tests. The chamber supports test execution under GLP and GMP-aligned workflows: audit-trail-capable controllers (optional upgrade) log all parameter changes, setpoint deviations, and alarm events with timestamped records. It meets mechanical and electrical safety standards per UL 61010-1 and CE marking directives (2014/30/EU, 2014/35/EU), and is routinely deployed in labs performing qualification per MIL-STD-810H Method 502.7 (low temperature), Method 507.6 (humidity), and Method 506.6 (temperature shock).

Software & Data Management

Standard configuration includes an embedded 7-inch TFT touchscreen controller with intuitive menu navigation, programmable multi-step profiles (up to 99 segments), and real-time trend display for temperature and humidity channels. Optional Ethernet or RS485 interface enables integration into centralized lab data acquisition networks. With OK’s optional LabLink Pro software (Windows-compatible), users can remotely monitor chamber status, export CSV-formatted time-series data with metadata tagging, generate PDF test reports compliant with ISO/IEC 17025 documentation requirements, and configure automated email alerts upon profile completion or fault detection. Full 21 CFR Part 11 compliance—including electronic signatures, role-based access control, and immutable audit logs—is available via firmware-enabled security modules.

Applications

• Accelerated aging of polymeric components (e.g., gaskets, seals, encapsulants) under combined thermal-hygric stress to predict service life per Arrhenius–Eyring models.
• Environmental stress screening (ESS) of electronic subassemblies prior to HALT/HASS, verifying solder joint integrity and conformal coating performance at 85 °C / 85% RH.
• Stability testing of primary and secondary pharmaceutical packaging per ICH Q1A(R2), including moisture permeation rate evaluation of aluminum-laminated pouches.
• Validation of solar module backsheet resistance to damp heat per IEC 61215-2 MQT 11, supporting PV module certification workflows.
• Textile colorfastness and dimensional stability assessment per AATCC Test Method 100 and ISO 139, using controlled conditioning prior to mechanical testing.

FAQ

What is the maximum allowable load weight inside the chamber?

The chamber’s internal shelf structure supports up to 30 kg distributed evenly across the base plate; static loading beyond this may compromise airflow uniformity and thermal response accuracy.
Can the OK-TH-408 perform rapid temperature transitions between extremes?

While optimized for stable steady-state operation, the unit achieves a nominal heating rate of 1.0–3.0 °C/min; for programmable ramp-and-soak profiles with defined transition rates, custom firmware configuration is recommended.
Is third-party calibration certification included with delivery?

Factory calibration against NIST-traceable references is performed pre-shipment; a certificate of conformance (CoC) is provided. UKAS or ISO/IEC 17025-accredited calibration services are available as an add-on option.
Does the chamber meet IP rating requirements for dust or water ingress protection?

The OK-TH-408 is not rated to any IP standard—it is designed for controlled indoor laboratory use only and must be installed in environments free from ambient particulates, corrosive vapors, or condensate exposure.
How often does the humidification system require maintenance?

The steam generator requires quarterly descaling using approved citric acid solution; distilled or deionized water must be used exclusively to prevent mineral buildup and ensure long-term sensor accuracy.