OK Instruments OK-ZTH-1000 Combined Temperature-Humidity-Vibration Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | OK-ZTH-1000 |
| Price | USD 21,200 (approx.) |
| 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 Combined Temperature-Humidity-Vibration Test Chamber is an integrated reliability validation system engineered for high-fidelity simulation of multi-stress environmental conditions encountered during product operation, transportation, and storage. It simultaneously or sequentially applies controlled thermal cycling, humidity exposure, and mechanical vibration—based on Couette-flow air circulation, PID-controlled steam humidification, and electromagnetic shaker technology—to accelerate failure mode identification in electronic, electromechanical, and structural assemblies. Unlike sequential single-stress testing, this triaxial stress coupling enables detection of synergistic failure mechanisms—including solder joint fatigue, condensation-induced corrosion, thermal expansion mismatch, and micro-crack propagation under dynamic loading—that remain undetectable in isolated environmental or mechanical tests. The chamber is purpose-built for High-Accelerated Life Testing (HALT) and High-Accelerated Stress Screening (HASS), supporting early design margin assessment and production lot screening per industry-standard stress profiles.
Key Features
- Triple-stress integration architecture: Fully synchronized control of temperature, relative humidity, and 3-axis vibration within a single sealed enclosure—eliminating inter-system latency and thermal/humidity drift during vibrational excitation.
- High-performance thermal subsystem: Dual-stage cascade refrigeration with liquid nitrogen assist option; resistive heating elements with distributed airflow; achieves −70 °C to +150 °C range with programmable ramp rates up to 15 °C/min and stability ≤ ±0.5 °C over working volume.
- Precision humidity control: Steam-based humidification system delivering 20–98 %RH across 20–85 °C ambient, compliant with IEC 60068-3-5 for humidity uniformity and recovery time specifications.
- Integrated electrodynamic shaker: 1000 N force capacity, frequency range 5–3000 Hz, displacement limit ±25.4 mm peak-to-peak; supports fixed-frequency, swept-sine, random, and transient shock waveforms per ISO 10816 and MIL-STD-810H Annex G.
- Robust structural design: Stainless steel inner chamber with reinforced floor mounting interface; vibration-isolated external frame; EMI-shielded cabling ports and feedthroughs for real-time DUT monitoring.
- Comprehensive safety architecture: Redundant over-temperature, over-humidity, over-acceleration, and over-displacement cutoffs; emergency stop with hardware interlock; chamber door safety switch and pressure relief valve.
Sample Compatibility & Compliance
The OK-ZTH-1000 accommodates DUTs up to 15 kg mounted on standardized aluminum test plates (350 W maximum internal power dissipation). Its internal dimensions (W×D×H: 1000×1000×1000 mm) support automotive ECUs, avionics line-replaceable units (LRUs), battery modules, and industrial control cabinets. The system complies with core requirements of MIL-STD-810H Method 520.5 (Combined Environments), IEC 60068-2-68 (Combined Temperature/Humidity/Vibration), ISO 16750-4 (Road Vehicles – Environmental Conditions), and GB/T 2423.34 (Chinese national standard for combined testing). Calibration traceability follows ISO/IEC 17025 guidelines, with optional NIST-traceable certification available for temperature, humidity, and acceleration sensors.
Software & Data Management
Control and data acquisition are managed via OK-TestSuite v4.2—a Windows-based platform supporting multi-channel real-time logging at up to 10 kHz sampling rate. Users define complex test profiles using graphical timeline editors, including nested loops, conditional triggers, and stimulus synchronization points. The software provides full audit trail functionality compliant with FDA 21 CFR Part 11 (electronic signatures, change history, user access levels), GLP/GMP-aligned report generation (PDF/CSV), and automated pass/fail evaluation against user-defined limits. Remote monitoring via secure HTTPS API enables integration into enterprise MES/QMS systems.
Applications
- Automotive: HALT validation of ADAS domain controllers, EV battery management systems (BMS), and radar sensor housings under thermal shock + broadband vibration.
- Aerospace & Defense: Qualification of flight-critical avionics per DO-160 Section 25 (Combined Temperature/Vibration) and MIL-STD-810H Method 520.5.
- Consumer Electronics: HASS screening of ruggedized tablets, drone gimbals, and outdoor IoT gateways subjected to desert-humid + road vibration profiles.
- Industrial Automation: Reliability verification of PLCs, motor drives, and wireless sensor nodes operating in oil & gas or renewable energy environments.
- Medical Devices: Accelerated aging studies for implantable electronics and portable diagnostic equipment per ISO 14971 risk management framework.
FAQ
What standards does the OK-ZTH-1000 support for combined environmental testing?
It supports test method definitions from MIL-STD-810H Method 520.5, IEC 60068-2-68, ISO 16750-4, and GB/T 2423.34, with configurable profile templates aligned to each standard.
Can the system perform vibration testing at sub-zero temperatures?
Yes—the integrated electromagnetic shaker maintains rated performance down to −70 °C, verified through cold-chamber shaker qualification per ISO 10816-3 Annex B.
Is remote operation and data export supported?
Yes—OK-TestSuite includes RESTful API endpoints for third-party SCADA/MES integration, TLS-secured remote desktop access, and automated report export to network shares or cloud storage.
What maintenance intervals are recommended for long-term reliability?
Preventive maintenance is scheduled every 12 months, including refrigerant pressure verification, shaker armature centering, humidity sensor recalibration, and safety circuit functional testing per manufacturer’s service manual.
Does the system support custom fixture design and modal analysis integration?
Yes—OK Instruments provides mechanical interface drawings (STEP/IGES), modal test support packages, and optional laser Doppler vibrometer synchronization for experimental modal analysis during operational testing.
