YIHENG BHO Series High-Temperature Aging Test Chamber
| Brand | YIHENG |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | BHO-401A / BHO-402A |
| Temperature Range | RT+20°C to 250°C |
| Max Operating Temperature | 300°C |
| Temperature Uniformity | ±1% of setpoint (at working volume center) |
| Temperature Fluctuation | ±0.5°C |
| Air Exchange Rate | 0–200 cycles/hour (adjustable) |
| Interior Dimensions (W×H×D) | 450×450×450 mm / 600×600×600 mm |
| Display | Large LCD with multi-parameter real-time view |
| Control System | Multi-segment programmable controller (7 programs × 9 steps, 0–5999 min/step) |
| Safety | Independent over-temperature cutoff with audible/visual alarm |
| Data Interface (optional) | RS-485, USB (U-disk), printer port |
Overview
The YIHENG BHO Series High-Temperature Aging Test Chamber is an engineered environmental test system designed for accelerated thermal aging evaluation of materials, components, and finished products under controlled elevated temperature conditions. Based on forced-air convection and precision PID-controlled heating, the chamber maintains stable thermal environments across its working volume to simulate long-term exposure effects—such as polymer degradation, sealant embrittlement, coating discoloration, and electronic component drift—within compressed timeframes. Its architecture complies with fundamental thermal testing principles defined in ASTM D3045, ISO 2812-3, and IEC 60068-2-2, supporting reliability qualification, quality assurance, and R&D validation workflows in electronics, automotive, aerospace, and polymer manufacturing sectors.
Key Features
- Forced-air circulation system with adjustable air exchange rate (0–200 cycles/hour), enabling precise control over oxidative aging kinetics and thermal mass transfer dynamics.
- Stainless steel mirror-finish interior chamber with radius-rounded corners and removable shelf supports—designed for contamination-free operation and ease of cleaning per ISO 14644-1 Class 8 cleanroom maintenance protocols.
- Motor-driven rotating sample turntable (low-speed, continuous rotation) ensures uniform thermal exposure across all specimens, minimizing positional bias and improving inter-sample reproducibility.
- Multi-segment programmable controller supporting up to 7 independent test profiles, each comprising 9 programmable steps; parameters include target temperature, dwell time, ramp rate, and fan speed—all configurable with resolution down to 1 minute and 0.1°C.
- Real-time LCD interface displaying setpoint, actual chamber temperature, elapsed time, remaining time, and active program step—optimized for operator situational awareness without requiring external software.
- Dual-stage thermal safety architecture: primary PID loop + independent mechanical over-temperature cut-off switch with visual LED indicator and audible alarm, compliant with IEC 61000-6-2 EMC immunity requirements.
Sample Compatibility & Compliance
The BHO chamber accommodates a broad range of sample geometries—including PCB assemblies, elastomeric gaskets, plastic housings, wire insulation segments, and thin-film coatings—within its two standard internal volumes (450 mm³ and 600 mm³). All models are constructed to meet CE marking requirements for electrical safety (EN 61010-1) and electromagnetic compatibility. While not certified to UL or CSA standards out-of-the-box, the design basis aligns with UL 746C material endurance testing frameworks. Temperature uniformity (±1% of setpoint) and stability (±0.5°C) are verified per ASTM E742 practices using calibrated NIST-traceable PT100 sensors at nine spatial locations within the working volume.
Software & Data Management
Data logging and traceability are supported via optional digital interfaces: RS-485 Modbus RTU enables integration into centralized LabVantage or Siemens Desigo CCMS platforms; USB host port allows direct export of timestamped temperature/time logs to FAT32-formatted U-disks; parallel printer interface supports real-time hardcopy recording for GLP/GMP audit trails. When paired with YIHENG’s optional PC-based monitoring software (v3.2), users gain access to full 21 CFR Part 11-compliant features—including electronic signatures, user role-based permissions, and immutable audit logs—ensuring regulatory readiness for pharmaceutical packaging validation or medical device aging studies.
Applications
- Accelerated life testing of thermoplastics and thermosets per ISO 11357-6 (oxidative induction time estimation).
- Thermal stress screening of solder joints and conformal coatings in automotive ECUs.
- Validation of shelf-life claims for adhesives and encapsulants used in photovoltaic module lamination.
- Pre-conditioning of lithium-ion battery cells prior to cycle life testing (IEC 62660-1).
- Compliance verification against MIL-STD-810H Method 502.6 (high-temperature storage).
- Material selection support for high-temperature sealing applications in oil & gas downhole tools.
FAQ
What is the maximum allowable ambient temperature for continuous operation?
The chamber is rated for installation in environments ≤30°C ambient with ≥50 cm clearance on all sides for heat dissipation.
Can the BHO series be used for humidity-controlled aging?
No—this model is strictly a dry-heat aging chamber; humidity control requires the YIHENG BHG series (combined temp/humidity chamber).
Is calibration certificate included with shipment?
A factory calibration report (traceable to CNAS-accredited standards) is provided; ISO/IEC 17025-certified field calibration services are available upon request.
How is temperature uniformity validated during installation qualification (IQ)?
YIHENG provides IQ/OQ documentation templates aligned with Annex 15 and ASTM E2297, including sensor placement diagrams and acceptance criteria tables.
Does the controller support remote monitoring via Ethernet or Wi-Fi?
Standard configuration includes only RS-485 and USB; Ethernet/Wi-Fi modules are available as custom add-ons under OEM agreement.
