OK-FD-TH Series Environmental Stress Screening Chamber – Temperature & Humidity Cycling Test Chamber
| Brand | OK-FD |
|---|---|
| Origin | Imported |
| Manufacturer Type | Authorized Distributor |
| Temperature Range | -40°C to +150°C |
| Humidity Range | 20–98% RH |
| Temperature Uniformity | ±2.0°C |
| Humidity Uniformity | ±3.0% RH |
| Temperature Fluctuation | ±0.5°C |
| Humidity Fluctuation | ±2.5% RH |
| Heating Rate | ~4.0°C/min |
| Cooling Rate | ~1.0°C/min |
| Internal Dimensions (L×W×H) | 500×400×400 mm to 700×600×600 mm |
| External Dimensions | 1200×1950×1100 mm to 1450×2100×1350 mm |
| Refrigerant | R404A/R23 (ODP = 0) |
| Power Supply | AC220V±5%, 50Hz, single-phase three-wire or AC380V±5%, 50Hz, three-phase five-wire |
| Construction | Interior – SUS#304 stainless steel |
| Insulation | Dual-layer – rigid polyurethane foam + fiberglass |
| Controller | 7-inch TFT color LCD touch screen, bilingual (English/Chinese) |
| Port | One Φ50 mm test port on left side |
| Safety | Over-temperature, over-humidity, compressor overload, phase failure, and leakage protection |
Overview
The OK-FD-TH Series Environmental Stress Screening Chamber is a precision-engineered temperature and humidity cycling test system designed for accelerated reliability evaluation of electronic components, automotive modules, aerospace avionics, electrical enclosures, and polymer-based materials. It operates on the principle of controlled environmental stress application—precisely modulating chamber air temperature and relative humidity in programmable sequences to simulate real-world operational extremes and storage conditions. Unlike static thermal chambers, this system supports dynamic, multi-step profiles—including ramp-hold-soak cycles, sinusoidal variations, and stepwise transitions—enabling compliance testing per IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-30 (damp heat, cyclic), and MIL-STD-810H Method 507.5. Its dual-layer insulation architecture, low-GWP refrigerants (R404A/R23), and closed-loop PID-controlled heating/humidification ensure high reproducibility across repeated test runs—critical for qualification protocols requiring statistical confidence in failure mode analysis.
Key Features
- 7-inch full-color TFT LCD touchscreen controller with intuitive bilingual (English/Chinese) interface and real-time graphical profile visualization
- Dual-zone thermal management: independent control of heating (nickel-chromium alloy sheathed heaters with ceramic insulation) and humidification (embedded electric steam generator)
- Hermetically sealed, low-noise compressors (French/Tecumseh OEM units) with forced-air cooling and adaptive refrigerant flow regulation based on real-time load analysis
- Double-gasketed door seal using high-tensile silicone rubber rated for continuous operation from –40°C to +150°C
- Triple-layer observation window: tempered laminated glass with integrated conductive ITO film for anti-fogging and uninterrupted visual monitoring
- Structural integrity: interior chamber fabricated from mirror-finished SUS#304 stainless steel; exterior housing available in powder-coated galvanized steel or optional SUS#304
- Comprehensive safety suite: independent over-temperature cutoff, humidity limit lockout, compressor high-pressure shutdown, phase-loss detection, and earth-leakage circuit interruption
Sample Compatibility & Compliance
The chamber accommodates a broad range of sample configurations—from PCB assemblies and battery packs to coated metal housings and elastomeric seals—via its standardized Φ50 mm feedthrough port (left-side mounted, gasket-sealed). Optional stainless-steel shelves support uniform airflow distribution without obstructing sensor placement. The system meets structural and operational requirements for ISO/IEC 17025-accredited laboratories conducting environmental qualification under GLP/GMP frameworks. Its controller logs all setpoints, actual values, alarms, and timestamped events with audit-trail capability—supporting traceability per FDA 21 CFR Part 11 when paired with validated software. Calibration certificates (NIST-traceable) are provided for temperature and humidity sensors at time of delivery.
Software & Data Management
The embedded controller supports up to 100 user-defined test programs, each containing up to 99 segments with customizable ramp rates, dwell times, and humidity coupling modes (e.g., constant RH during temperature transitions). Data logging occurs at 1-second intervals and is exportable via USB to CSV format for post-processing in MATLAB, JMP, or Minitab. Optional Ethernet connectivity enables remote monitoring and integration into centralized lab management systems (LIMS) via Modbus TCP or OPC UA protocols. All firmware updates are performed via secure signed packages to maintain regulatory integrity.
Applications
- Electronics: Thermal cycling fatigue assessment of solder joints (per IPC-9701), moisture sensitivity level (MSL) pre-conditioning prior to reflow
- Automotive: Validation of infotainment displays, ADAS sensors, and EV battery thermal management systems against ISO 16750-4
- Aerospace: Component-level environmental screening per RTCA DO-160 Section 4 (temperature) and Section 5 (humidity)
- Materials Science: Accelerated aging of adhesives, conformal coatings, and composite laminates under combined thermal-hygric stress
- Quality Assurance: In-process verification of production lots against internal specifications for shelf-life stability
FAQ
What is the maximum allowable sample mass for stable temperature/humidity control?
Stability is maintained for loads up to 15 kg within the standard chamber volume. For heavier or thermally massive samples, custom airflow optimization and extended stabilization periods may be required.
Can the chamber operate continuously at –40°C with 98% RH?
No—condensation risk limits simultaneous extreme low-temperature and high-humidity operation. The controller enforces safe operating envelopes per ASHRAE psychrometric constraints.
Is third-party calibration included with purchase?
Yes—a factory-issued NIST-traceable calibration certificate for temperature (–40°C to +150°C) and humidity (20–98% RH) is supplied with each unit.
What maintenance intervals are recommended?
Compressor oil inspection every 2,000 hours; humidifier tank cleaning weekly; condensate drain line flushing monthly; full preventive maintenance annually by certified service personnel.
Does the system comply with RoHS and REACH directives?
Yes—all structural materials, refrigerants, and electronic components meet EU Directive 2011/65/EU (RoHS2) and Regulation (EC) No 1907/2006 (REACH) substance restrictions.
