Hao Tianxin SMC-80L Temperature and Humidity Controlled Chamber

Overview

The Hao Tianxin SMC-80L Temperature and Humidity Controlled Chamber is an engineered environmental test system designed for precise, repeatable simulation of climatic conditions across a wide operational envelope. It operates on the fundamental principles of dual-loop feedback control: independent PID-regulated thermal conditioning (via resistive heating and vapor-compression refrigeration) and humidity modulation (via resistive water-bath evaporation and refrigerant-based dehumidification). Air circulation is maintained by a top-mounted centrifugal fan with adjustable airflow distribution, ensuring uniform thermal and hygric profiles throughout the 80 L working volume. The chamber complies with core requirements of IEC 60068-3-5 (Environmental testing — Part 3-5: Supporting documentation and guidance — Confirmation of the performance of temperature chambers) and ASTM D4332 (Standard Practice for Conditioning Containers, Packages, or Packaging Components for Testing), making it suitable for pre-compliance screening in product development and quality assurance workflows.

Key Features

• Stainless steel inner chamber constructed from SUS304 mirror-finish grade stainless steel, welded using TIG (tungsten inert gas) process for corrosion resistance and cleanability;
• Exterior cabinet fabricated from A3 carbon steel with electrostatic powder coating for mechanical durability and chemical resistance;
• Programmable touchscreen controller (TT-5166 or TEMI880 series) supporting multi-segment ramp-soak profiles, real-time data logging, and user-defined alarm thresholds;
• Large double-glazed observation window with integrated LED illumination for non-intrusive visual monitoring without thermal leakage;
• Dedicated 50 mm diameter test port on left side wall, fitted with silicone gasket and removable plug for sensor feedthrough or cable routing;
• Independent over-temperature protection circuit with mechanical cut-off relay, activated when internal temperature exceeds preset safety limit;
• Fail-safe interlocks: heater power disengages upon fan failure; humidifier shuts down automatically when water level falls below operational threshold; refrigeration cycle halts if chamber temperature exceeds 40 °C or RH exceeds 98%;
• Air-cooled condensing unit eliminates need for external water supply or drainage infrastructure.

Sample Compatibility & Compliance

The SMC-80L accommodates standard-sized electronic components, PCB assemblies, polymer specimens, packaging prototypes, and small mechanical subassemblies. Its internal dimensions (W400 × D400 × H500 mm) support ISO/IEC 17025-aligned placement protocols—samples are positioned at least 100 mm from all chamber walls and 50 mm from ceiling/floor to minimize boundary-layer effects. The system meets functional requirements for accelerated stress testing per MIL-STD-810H Method 507.6 (Humidity) and Method 501.7 (High Temperature), as well as JIS Z 8701-2019 (Environmental testing — General rules). While not certified to UL or CE standards out-of-the-box, its architecture supports third-party validation for GLP/GMP environments when deployed with audit-ready calibration records and documented preventive maintenance logs.

Software & Data Management

The embedded controller provides local data storage for up to 100 test programs and 30 days of continuous 1-minute interval logging (temperature and relative humidity). Export is supported via USB 2.0 interface in CSV format for traceable post-processing in Excel, MATLAB, or statistical analysis platforms. Optional RS485 Modbus RTU communication enables integration into centralized SCADA or MES systems for automated report generation and remote supervision. All logged parameters include timestamp, setpoint, measured value, and status flag (e.g., “HEATING”, “COOLING”, “HUMIDIFYING”), satisfying basic FDA 21 CFR Part 11 requirements for electronic record integrity when paired with organizational SOPs governing user access and audit trail review.

Applications

• Accelerated aging studies of polymeric encapsulants, adhesives, and conformal coatings under combined thermal-hygric stress;
• Pre-screening of printed circuit board (PCB) reliability prior to HALT/HASS campaigns;
• Evaluation of moisture barrier performance in flexible electronics packaging (e.g., OLED substrates, thin-film sensors);
• Stability testing of pharmaceutical excipients and medical device packaging per USP <755> and ISO 11607-1;
• Qualification of automotive interior materials per VW 80101 and GMW15635 specifications;
• Validation of sensor drift characteristics for environmental monitoring devices operating in tropical or arid climates.

FAQ

What is the recommended ambient environment for stable operation?
The chamber requires installation in a climate-controlled room maintained between 15 °C and 35 °C, with relative humidity below 85% RH and minimal diurnal temperature fluctuation. Floor leveling must be verified with a precision spirit level before commissioning.
Can the SMC-80L perform rapid temperature transitions?
Yes—its non-linear empty-load heating rate ranges from 0.7 °C/min to 1.5 °C/min; cooling rate ranges from 3.0 °C/min to 3.5 °C/min. Actual transition performance depends on sample thermal mass and load configuration.
Is calibration documentation included with delivery?
A factory calibration certificate (traceable to NIM, China) is supplied, covering temperature and humidity sensors at three points across the operating range. Users are responsible for establishing a periodic recalibration schedule aligned with internal QA policies.
Does the system support remote monitoring via Ethernet or Wi-Fi?
No native Ethernet or Wi-Fi interface is provided; however, optional RS485-to-Ethernet gateways can be integrated externally for networked supervision.
What maintenance intervals are recommended?
Condenser coil cleaning every 3 months; water tank descaling every 2 weeks (using 5% acetic acid solution); full system performance verification annually or after 1,000 operational hours—whichever occurs first.