OK Instruments OK-ZTH-1000.258 Combined Temperature-Humidity-Vibration Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | OK-ZTH-1000.258 |
| Temperature Range | −70 °C to +150 °C |
| Humidity Range | 20–98 %RH at 20–85 °C |
| Temperature Ramp Rate | 5 / 10 / 15 °C/min |
| Temperature Uniformity | ≤ ±0.5 °C |
| Standard Load Capacity | 15 kg aluminum mass, 350 W internal heat dissipation |
Overview
The OK Instruments OK-ZTH-1000.258 Combined Temperature-Humidity-Vibration Test Chamber is an integrated environmental reliability test system engineered for simultaneous or sequential application of thermal, hygric, and mechanical stressors. It implements a triaxial environmental simulation architecture—combining precision-controlled climatic conditioning (per ISO 24344, IEC 60068-3-5) with electromagnetic shaker-based vibration excitation (per ISO 10816, ASTM D4728). This configuration enables realistic replication of field-relevant compound stress conditions encountered during transportation, storage, and operational life cycles—including automotive under-hood environments, avionics deployment in humid high-altitude cabins, and battery module operation under road-induced vibration and tropical ambient exposure. Unlike cascaded single-stress testing, the OK-ZTH-1000.258 ensures true concurrent stress coupling, supporting accelerated life testing (ALT), environmental stress screening (ESS), and HALT/HASS protocols per MIL-STD-781 and JEDEC JESD22-A108.
Key Features
- Hermetically sealed dual-chamber architecture: Stainless steel inner chamber (AISI 304) with high-density polyurethane insulation (λ = 0.022 W/m·K) and reinforced carbon steel outer enclosure.
- Triple-mode climate control: Nickel-chromium heating elements, steam-based humidification (±1.5 %RH accuracy), and cascade refrigeration system with R404A/R23 refrigerants enabling −70 °C base temperature and continuous dehumidification down to 10 %RH.
- Electromagnetic vibration subsystem: High-force linear shaker (rated 258 kgf peak thrust), air-cooled voice coil actuator, and closed-loop servo controller supporting sine, random, shock, and fatigue spectrum profiles (5–3000 Hz bandwidth).
- Integrated dynamic interface: Patented bellows-coupled vibration transmission path through chamber floor—maintaining thermal integrity (leak rate <1×10⁻⁴ Pa·m³/s) and mechanical decoupling (transmissibility <−30 dB above 100 Hz).
- Unified real-time control platform: Linux-based embedded controller with synchronized multi-channel PID regulation, programmable event-triggered mode switching, and deterministic time-stamping (≤1 ms resolution).
- Comprehensive safety architecture: Dual independent over-temperature cutoffs, humidity saturation detection, vibration displacement limiter, emergency power-off circuitry compliant with IEC 61000-6-2 EMC immunity requirements.
Sample Compatibility & Compliance
The OK-ZTH-1000.258 accommodates samples up to 1000 L internal volume (W×D×H: 1000×1000×1000 mm) with 15 kg maximum inertial load on the shaker table. Sample mounting interfaces include M10 threaded inserts and adjustable T-slots conforming to ISO 13374-2 mechanical interface standards. The system meets calibration traceability requirements per ISO/IEC 17025 and supports GLP/GMP audit trails via optional electronic logbook with 21 CFR Part 11-compliant user authentication and data integrity controls. It is validated for compliance with IEC 60068-2-1 (cold), -2 (dry heat), -14 (change of temperature), -30 (damp heat cyclic), -64 (vibration, broadband random), and MIL-STD-810H Method 514.7.
Software & Data Management
Control and monitoring are executed via OK-TestSuite v4.2—a Windows-based application featuring hierarchical test sequence programming, real-time waveform visualization (FFT, PSD, SRS), and automated report generation in PDF/XLSX formats. All sensor data (temperature, RH, acceleration, displacement) are sampled at 10 kHz and stored with metadata including operator ID, calibration certificate IDs, and environmental chamber status flags. Raw binary archives (.okd) support post-processing in MATLAB, Python (via provided SDK), or third-party tools such as VibrationVIEW and m+p Analyzer. Audit logs record every parameter change, manual override, and alarm event with SHA-256 hash verification for data authenticity.
Applications
- Automotive electronics: Validation of ADAS ECUs, battery management systems (BMS), and powertrain sensors under combined thermal cycling (−40/+85 °C), 85 %RH soak, and road-spectrum vibration per ISO 16750-4.
- Aerospace components: Testing of flight control actuators and avionics enclosures subjected to rapid decompression analogs (10 °C/min ramp), condensation-prone humidity ramps, and broadband random shake per DO-160G Section 8.
- Energy storage systems: Accelerated aging of lithium-ion battery packs under 45 °C/95 %RH dwell while undergoing 1–200 Hz swept-sine vibration to assess cell-to-cell delamination and thermal runaway propagation.
- Railway signaling equipment: Endurance assessment per EN 50125-3 for onboard controllers exposed to coastal humidity (98 %RH), ambient temperature swings (−25/+70 °C), and track-induced harmonic resonance (12–25 Hz).
- Medical device sterilization packaging: Verification of seal integrity and material degradation under steam-sterilizable humidity profiles (121 °C saturated steam equivalent) coupled with transport vibration per ISO 11607-2 Annex B.
FAQ
Can the OK-ZTH-1000.258 perform independent temperature-humidity or vibration tests?
Yes. The system operates in standalone modes: as a Class II climatic chamber per IEC 60068-2-78 or as a calibrated electromagnetic shaker per ISO 5347, with full parameter retention and calibration validity.
What is the maximum allowable sample height when using vertical vibration?
The effective clear height above the shaker table is 850 mm; samples must maintain ≥50 mm clearance from all chamber walls during peak displacement to prevent mechanical interference.
Does the system support custom vibration spectra defined by user-imported .sdf or .rsd files?
Yes. OK-TestSuite accepts industry-standard spectrum definitions (SDF, RSD, PSD) and auto-scales drive signals to match specified kurtosis, RMS acceleration, and peak G limits.
How is traceability maintained for temperature and humidity sensors?
All Pt100 RTDs and capacitive RH sensors are factory-calibrated against NIST-traceable references (certificates included); recalibration intervals are configurable and logged automatically.
Is remote monitoring and alarm notification supported?
Optional Ethernet/IP and Modbus TCP interfaces enable integration into facility SCADA systems; email/SMS alerts trigger on critical fault conditions (e.g., refrigerant pressure deviation >15%, shaker coil temperature >120 °C).
