High Low Temperature Alternating Test Chamber – YIHENG BPHJ Series
| Brand | YIHENG |
|---|---|
| Model | BPHJ Series |
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Pricing | Upon Request |
Overview
The YIHENG BPHJ Series High Low Temperature Alternating Test Chamber is an engineered environmental simulation system designed for precise, repeatable thermal cycling under controlled conditions. Based on forced-air convection and dual-stage refrigeration architecture, it enables programmable temperature alternation between −70 °C and +150 °C (model-dependent), supporting standardized thermal stress testing in accordance with IEC 60068-2-14 (Test N: Change of Temperature), MIL-STD-810H Method 503.7, and GB/T 2423.22. Its core function is to evaluate material stability, solder joint integrity, seal performance, and electronic component reliability under repeated thermal expansion/contraction cycles—critical for automotive electronics, aerospace subsystems, PCB manufacturing, and polymer development laboratories.
Key Features
- Environmentally compliant refrigeration system utilizing non-ozone-depleting HFC-based refrigerants, fully aligned with EU F-Gas Regulation (EU) No 517/2014 and China’s HCFC Phase-Out Management Plan.
- High-stability microprocessor-based controller with color TFT LCD touchscreen interface (standard on all BPHJ models), supporting intuitive menu navigation and real-time graphical display of temperature profiles.
- Dual-language UI (English / Chinese) with password-protected screen lock, preventing unauthorized parameter modification during unattended operation.
- Robust internal chamber constructed from electropolished AISI 304 stainless steel with radius-rounded corners and removable adjustable shelves—ensuring corrosion resistance, ease of cleaning, and compliance with ISO 14644-1 Class 8 cleanroom-compatible maintenance protocols.
- Independent overtemperature protection circuit with audible/visual alarm and automatic power cutoff, meeting IEC 61000-4-2 ESD immunity requirements and UL 61010-1 safety certification benchmarks.
- Multi-stage programmable logic: up to 120 programs, each containing 99 segments; maximum cycle count: 999; segment duration resolution: 1 second (00:00:01 to 999:59:59).
- Integrated PID auto-tuning algorithm with adaptive compensation for load variation, minimizing overshoot and stabilizing chamber setpoints within ±0.5 °C (typical) under dynamic thermal loading.
Sample Compatibility & Compliance
The BPHJ chamber accommodates standard test specimens up to 500 mm × 500 mm × 500 mm (W×D×H), with optional 25 mm or 50 mm diameter cable/port access holes on the left side wall (gasket-sealed). It supports passive sensor integration (e.g., thermocouples, RTDs) via external feedthroughs and is compatible with DIN 50017, ASTM D3418, and IPC-TM-650 2.6.7 thermal shock validation procedures. All units undergo factory calibration traceable to CNAS-accredited reference standards (ISO/IEC 17025), with optional on-site verification reports available upon request.
Software & Data Management
Equipped with RS-232 and RS-485 communication interfaces as standard, the BPHJ series integrates seamlessly with YIHENG’s proprietary PC-based control suite (v3.2+), enabling centralized monitoring and synchronized operation of up to 30 chambers. Data logging occurs at user-defined intervals (1 s to 3600 s), exporting time-stamped temperature/humidity records directly to .CSV, Excel (.xlsx), or Word (.docx) formats. Optional USB SD-card slot supports offline data archiving with timestamped file naming (e.g., “BPHJ-023_20240517_142231.csv”). The software includes audit trail functionality compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, user-level access control, and immutable event logs—for regulated QC/QA environments operating under GLP or GMP frameworks.
Applications
- Thermal cycling qualification of automotive ECUs per AEC-Q200 Rev D
- Accelerated aging studies of lithium-ion battery modules under variable SOC and ambient conditions
- Validation of conformal coating adhesion on printed circuit assemblies
- Stress screening of optoelectronic components (LEDs, photodiodes) prior to burn-in
- Material coefficient of thermal expansion (CTE) estimation via dimensional metrology correlation
- Pre-compliance environmental stress screening (ESS) in contract manufacturing organizations (CMOs)
FAQ
What temperature range does the BPHJ series support?
Standard configuration operates from −40 °C to +150 °C; extended low-temperature models (BPHJ-70L) reach −70 °C. Exact range depends on selected model variant and ambient installation conditions (e.g., room temperature ≤ 30 °C, ventilation ≥ 500 m³/h).
Is remote monitoring supported out-of-the-box?
Yes—RS-485 Modbus RTU protocol is built-in; Ethernet or Wi-Fi connectivity requires optional gateway module (YIHENG NET-100).
Can the chamber be validated for ISO/IEC 17025-compliant calibration?
Yes—factory calibration certificates include uncertainty budgets and traceability statements. On-site IQ/OQ/PQ documentation packages are available for GxP-regulated facilities.
What safety certifications does the unit carry?
CE marking (EMC Directive 2014/30/EU, LVD Directive 2014/35/EU), RoHS 2011/65/EU compliance, and CCC certification for domestic China deployment. UL/cUL listing available upon special order.
How is humidity control implemented?
The BPHJ series is a *temperature-only* alternating chamber; humidity control is not included. For combined temperature/humidity testing, refer to YIHENG’s BHJ Series Environmental Chambers.
