OK-ZTH-345 Combined Temperature-Humidity-Vibration Test System
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | OK-ZTH-345 |
| Price | USD 21,000 (FOB Guangdong) |
| 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 | 5 kg aluminum mass, 350 W internal heat dissipation |
Overview
The OK-ZTH-345 Combined Temperature-Humidity-Vibration Test System is an integrated environmental reliability platform engineered for simultaneous application of thermal, hygric, and mechanical (vibratory) stress profiles. It operates on the principle of multi-stress coupling—where temperature and humidity are precisely controlled within a vibration-isolated, structurally reinforced environmental chamber mounted directly on a high-performance electrodynamic shaker. This architecture enables true synchronous execution of programmable vibration spectra (sine, random, shock, road profile replication) under dynamically varying climatic conditions. Unlike standalone vibration systems or sequential environmental tests, the OK-ZTH-345 replicates real-world operational and transit environments where thermo-mechanical interactions govern failure mechanisms—such as thermally induced modulus shifts altering resonant frequencies, or humidity-accelerated corrosion compromising vibrational damping in electronic interconnects.
Key Features
- Electrodynamic shaker with closed-loop force feedback control, supporting acceleration up to 100 gpk, displacement up to ±25.4 mm, and frequency range from 5 Hz to 3000 Hz (dependent on payload and fixture configuration).
- Climate chamber constructed with stainless-steel inner walls, double-wall vacuum insulation, and anti-vibration mounting interface compliant with ISO 10816-3 for shaker-to-chamber decoupling.
- Triple-stage refrigeration system with cascade compressor design enabling stable operation across −70 °C to +150 °C; humidity generated via steam injection with PID-controlled saturation chamber and dual-sensor RH monitoring (±2 %RH accuracy).
- Integrated controller with synchronized time-base architecture: vibration waveform generation and climate profile execution share a common timestamp resolution (<1 ms), ensuring deterministic phase alignment between mechanical excitation and thermal transients.
- Hardware safety interlocks including door-lock verification prior to shaker activation, over-temperature/over-humidity shutdown, and real-time shaker armature displacement limit enforcement.
- Modular fixture interface compatible with standard 250 mm × 250 mm shaker table mounting holes and ISO 22810-compliant load distribution requirements.
Sample Compatibility & Compliance
The OK-ZTH-345 accommodates test specimens up to 5 kg mass with maximum dimensions constrained by usable chamber volume (net internal space: 345 L, after accounting for shaker moving coil clearance and airflow ducting). It supports standardized sample mounting using aluminum mass simulators (included) or customer-supplied fixtures adhering to ASTM D4728 (vibration testing of packaged products) and IEC 60068-2-64 (random vibration) protocols. The system meets structural integrity requirements per MIL-STD-810H Method 514.7 (vibration) and Method 502.7 (temperature/humidity), and is designed for GLP-compliant audit trails—including full parameter logging, user access control, and electronic signature support aligned with FDA 21 CFR Part 11 Annex 11 principles.
Software & Data Management
Control and analysis are executed via OK-VTS v4.2 software—a Windows-based application featuring graphical test profile builder, real-time FFT spectrum display, and synchronized data acquisition at up to 51.2 kHz sampling rate across all channels (acceleration, temperature, RH, chamber power, shaker current). All raw datasets are stored in HDF5 format with embedded metadata (test ID, operator, calibration certificate IDs, environmental setpoints, vibration PSDs). Export options include CSV, MATLAB .mat, and UFF58 formats. Audit logs record every parameter change, start/stop event, and safety trigger with UTC timestamps and operator credentials—enabling full traceability for ISO/IEC 17025 accreditation or automotive APQP Stage 3 validation reporting.
Applications
- Automotive Electronics: Validation of ADAS ECUs under combined thermal cycling (−40 °C → +85 °C @ 10 °C/min) and broadband random vibration (10–2000 Hz, 0.04 g²/Hz), simulating chassis-mount conditions during winter mountain driving.
- Aerospace Avionics: Modal stability assessment of flight control actuators across −65 °C to +125 °C while applying swept-sine excitation to identify temperature-dependent resonance drift per DO-160 Section 8.
- Consumer Electronics: Accelerated wearout testing of solder joints in mobile device PCBAs subjected to humidity soak (85 %RH, 85 °C) followed by low-frequency sinusoidal vibration (10–55 Hz, 1.5 g) to replicate drop-and-bounce transport scenarios.
- Industrial Sensors: Long-duration reliability screening (1000+ hours) of pressure transducers under combined humidity (95 %RH) and random vibration (5–500 Hz) to evaluate seal integrity and diaphragm fatigue life.
FAQ
What distinguishes the OK-ZTH-345 from a standard vibration test system?
It integrates a climatically rated shaker chamber with synchronized, time-aligned control of thermal, hygric, and dynamic mechanical stimuli—enabling true multi-stress interaction studies impossible with sequential or isolated testing.
Is the system compliant with automotive OEM test specifications such as GM W3177 or Ford CETP 00.00-L-467?
Yes—the controller firmware and test profile engine support direct import of XML-based test specifications per those standards, including ramp-hold-vibration sequences and conditional abort logic.
Can the system perform HALT or HASS profiles?
While not a dedicated HALT chamber, its rapid thermal ramp rates (up to 15 °C/min), wide vibration bandwidth, and real-time parameter correlation make it suitable for step-stress screening when configured with appropriate fixtures and monitoring sensors.
What calibration documentation is provided?
Each unit ships with NIST-traceable calibration certificates for temperature (±0.3 °C), humidity (±1.5 %RH), and shaker acceleration (±2 % amplitude linearity), valid for 12 months from shipment.
Does the system support remote monitoring and control?
Yes—via secure HTTPS web interface with role-based access, live video feed (optional IR camera integration), and SNMP-based alarm forwarding to enterprise IT infrastructure.
