YiHeng BPH-500B High-Low Temperature Environmental Test Chamber

Overview

The YiHeng BPH-500B High-Low Temperature Environmental Test Chamber is an engineered platform for precise, repeatable thermal stress testing under controlled ambient conditions. Based on forced-air convection with a dual-ducted air distribution system, it maintains stable thermal gradients across its 252 L working volume (600 × 600 × 700 mm interior), enabling reliable simulation of operational or storage environments ranging from −40 °C (cryogenic cold soak) to +150 °C (high-temperature aging). The chamber employs a hermetic scroll compressor paired with eco-friendly R-134a refrigerant—fully compliant with international ozone-depletion and global-warming-potential regulations—and integrates a high-efficiency axial circulation fan to ensure uniform airflow and minimal thermal stratification. Its structural design conforms to IEC 60068-2-1 (cold test), IEC 60068-2-2 (dry heat), and ASTM D3574 (foam aging) protocols, making it suitable for qualification testing in electronics, automotive components, polymer materials, and pharmaceutical packaging validation.

Key Features

• Stainless steel 304 mirror-finish interior with radius-rounded corners and removable adjustable shelves—designed for corrosion resistance, ease of decontamination, and compliance with ISO 14644 cleanroom maintenance standards.
• Programmable color touchscreen controller with intuitive menu navigation, bilingual (English/Chinese) UI, real-time temperature curve visualization, and built-in PID auto-tuning for dynamic thermal compensation.
• Multi-stage programmability: up to 120 programs, each supporting 99 segments; maximum cycle count: 999; segment duration resolution: 1 second (up to 999 h 59 min 59 s per segment).
• Dual independent safety systems: hardware-based overtemperature cutoff (mechanical limit thermostat) plus software-monitored deviation alarms for high/low temperature, compressor overheat, motor overcurrent, and fan failure.
• Standard 25 mm and optional 50 mm left-side port (with silicone gasket seal) for sensor feedthrough, power cable routing, or real-time external monitoring without compromising chamber integrity.
• Energy-optimized thermal insulation using high-density polyurethane foam (≥100 mm thickness, λ ≤ 0.022 W/m·K) and low-emissivity inner wall surface to minimize thermal leakage and reduce steady-state power consumption.

Sample Compatibility & Compliance

The BPH-500B accommodates samples up to 45 kg gross load with unrestricted geometric profiles—ideal for PCB assemblies, lithium-ion battery modules, elastomeric seals, medical device housings, and pre-filled syringe trays. Internal dimensions support standard ISTA 3A and MIL-STD-810H test configurations. All electronic controllers meet EMC Class B emission limits (EN 61326-1) and carry CE marking. When configured with the optional RS-485/USB data logging module and validated control software, the system supports 21 CFR Part 11-compliant electronic records—including user authentication, audit trail generation, and immutable timestamped data export to CSV, Excel, or PDF formats—enabling full traceability in regulated GxP environments.

Software & Data Management

Optional PC-based control software enables centralized supervision of up to 30 chambers simultaneously. It provides remote setup, real-time parameter visualization, alarm event logging, and automated report generation (PDF/Excel). Raw time-series data—including setpoint, actual temperature, ramp rate, and alarm status—is stored with millisecond-level timestamp precision. Exported datasets include metadata headers (operator ID, test ID, chamber serial number, calibration certificate expiry) to satisfy ISO/IEC 17025 clause 7.7 documentation requirements. Firmware updates are delivered via secure HTTPS download and require digital signature verification prior to installation.

Applications

• Temperature cycling reliability testing per JEDEC JESD22-A104 and IPC-9701.
• Thermal shock preconditioning for solder joint fatigue analysis.
• Accelerated aging studies of adhesives, encapsulants, and conformal coatings.
• Stability testing of active pharmaceutical ingredients (APIs) and finished dosage forms under ICH Q1A(R3) guidelines.
• Environmental stress screening (ESS) of avionics and defense-grade electronics per MIL-STD-2164.
• Validation of cold chain packaging performance during simulated transit conditions.

FAQ

What is the maximum ramp rate achievable between −40 °C and +150 °C?
The standard configuration achieves an average ramp rate of 3 °C/min (heating) and 2 °C/min (cooling) under no-load conditions. Actual rates vary with sample thermal mass and placement; detailed ramp profiling is available in the test protocol generator within the PC software.
Does the chamber support humidity control?
No—the BPH-500B is a dry-temperature-only chamber. For combined temperature/humidity testing, refer to the YiHeng BH series environmental chambers.
Is calibration certification included with shipment?
A factory-as-found calibration report (traceable to NIM, China) is provided. Full ISO/IEC 17025-accredited calibration with uncertainty budget requires separate scheduling through authorized service partners.
Can the controller log data internally without a PC connection?
Yes—the embedded controller stores up to 30 days of 1-minute-interval temperature data in non-volatile memory. Data export is supported via USB flash drive (FAT32 format) or SD card slot.
What maintenance intervals are recommended for long-term reliability?
Compressor oil and refrigerant pressure should be verified annually; air filter cleaning is required every 3 months; door gasket integrity and sensor zero-point drift should be checked semiannually per preventive maintenance checklist (provided in operator manual).