YIHENG BPHJ Series High-Low Temperature Alternating Environmental Test Chamber (Vertical)

Overview

The YIHENG BPHJ Series High-Low Temperature Alternating Environmental Test Chamber (Vertical) is an engineered solution for precise, repeatable thermal stress evaluation of materials, components, and finished products under dynamically controlled temperature conditions. Based on forced-air convection with dual-stage refrigeration and PID-regulated electric heating, the chamber delivers stable and uniform thermal environments across its working volume. It operates in accordance with fundamental principles of thermal cycling per IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and IEC 60068-2-14 (change of temperature), enabling standardized qualification testing for electronics, automotive parts, aerospace hardware, polymers, and medical devices. Its vertical configuration optimizes floor space while maintaining full accessibility to internal test zones and standardized porting for external sensor integration.

Key Features

• Programmable touchscreen controller with 7-inch color LCD, supporting both English and Chinese interface languages — eliminating language barriers in multinational lab environments.
• Multi-segment programming capability: up to 120 programs, each containing 99 steps; maximum cycle count: 999; time resolution down to 1 second per step — suitable for complex thermal profiles including ramp-hold-soak sequences.
• High-fidelity real-time monitoring: simultaneous display of temperature (and optional humidity) curves on screen, with built-in data logging to internal memory and export-ready SD card storage.
• Robust thermal architecture: imported hermetic compressors, high-efficiency eco-refrigerant (R404A/R507 compliant), and optimized air duct design ensure ±0.5°C temperature uniformity (at 25°C, empty chamber) and ±2.0°C stability over extended cycles.
• 304 mirror-finish stainless steel interior with radius-corner construction minimizes contamination traps and supports GLP-compliant cleaning protocols; adjustable shelf supports allow flexible sample arrangement.
• Dual-layer safety architecture: independent mechanical over-temperature limiter (non-software dependent), plus comprehensive electronic fault detection — including compressor thermal overload, fan stall, and deviation alarms (high/low/absolute limit).

Sample Compatibility & Compliance

The BPHJ chamber accommodates a broad range of sample geometries via its standard left-side access port (Ø25 mm or Ø50 mm, fitted with silicone gasket and plug). This enables integration of thermocouples, PT100 probes, or fiber-optic sensors without compromising chamber integrity. Internally, the chamber meets structural and operational requirements for compliance with ISO/IEC 17025 calibration traceability frameworks when used in accredited testing laboratories. Its thermal performance aligns with test method validity criteria in ASTM D3418 (thermal transitions of polymers), MIL-STD-810H Method 501.7/502.7 (temperature/humidity), and automotive OEM specifications such as GMW14124 and Ford CETP 00.00-L-467. Humidity-equipped variants (BPHJ-H models) further support combined environmental stress screening per IEC 60068-2-30.

Software & Data Management

The optional PC-based control suite supports centralized management of up to 30 chambers simultaneously. It provides full remote scheduling, real-time parameter visualization, event-triggered logging, and automated report generation in Excel (.xlsx) or Word (.docx) formats — fully compatible with internal QA documentation workflows. All data transfers comply with audit-trail requirements: timestamps, operator IDs, parameter modifications, and system status events are immutably recorded. The software supports FDA 21 CFR Part 11 readiness through configurable electronic signatures and role-based access control (RBAC), making it suitable for regulated industries requiring GMP/GLP data integrity.

Applications

• Thermal cycling reliability validation of PCB assemblies and semiconductor packages.
• Accelerated aging studies of elastomers, adhesives, and composite laminates.
• Pre-conditioning of batteries prior to electrochemical testing per UN 38.3 Section 4.1.
• Environmental stress screening (ESS) in manufacturing final-test stages.
• Qualification testing of medical device enclosures under ISO 11607-1 accelerated aging protocols.
• Material coefficient of thermal expansion (CTE) correlation studies using integrated thermometry.

FAQ

What is the standard temperature range for the BPHJ series?
Standard models operate from –70°C to +180°C; extended low-temperature variants down to –80°C are available upon request.
Is humidity control available?
Yes — optional humidity modules extend functionality to 20–98% RH at temperatures ≥+10°C, enabling combined temperature-humidity testing.
Can the chamber be integrated into a laboratory LIMS or MES system?
Via RS-485 Modbus RTU or TCP/IP Ethernet (with optional gateway), raw sensor data and status flags can be streamed to third-party platforms.
What certifications does the unit carry?
CE marking (EMC & LVD directives), RoHS compliance, and factory calibration certificates traceable to NIM (China National Institute of Metrology) are provided; ISO 17025 calibration services are available separately.
How is data integrity ensured during long-duration tests?
Internal non-volatile memory retains logged data during power interruption; SD card backups are timestamped and checksum-verified to prevent corruption.