Highlights / Outstanding Features / Characteristics

The control unit utilizes a computer, high-precision boards, and modular control. Signal collection and processing employ a 16-bit high-precision board, achieving an accuracy level of one percent, with stable performance and good repeatability.
The instrument boasts high accuracy, precision, stability, and reliability.
The instrument has a long service life and low operating costs.
The instrument is equipped with appropriate auxiliary equipment and consumables to ensure its normal operation.
Computer control interface: Employing high-end equipment and professionally developed software (LabVIEW), the interface is rigorous, highly automated, and all complex procedures and calculations are integrated into the computer, resulting in extremely fast response speed, convenient operation, and a user-friendly interface.
Operating software: Windows XP operating interface, LabVIEW style, with robust security mechanisms.

Test Methods / Procedures

Chamber Pre-heating: The chamber and radiant panel are heated until the black-body temperature stabilizes.
Loading: The specimen is slid into the chamber and pre-heated for a specified duration (typically 2 minutes) with the pilot burner in the “off” position.
Ignition: The stainless steel pilot burner is moved into position to ignite the specimen at the high-flux end.
Observation: The test continues for 30 minutes (or until flame-out). Technicians record:
- Flame Spread Distance: The maximum distance the flame travels along the specimen.
- Time to Ignition: The duration until sustained flaming is observed.
- Smoke Evolution: Continuous monitoring of smoke density via the DIN 50055 optical system.

Specifications

1. Combustion Chamber & Framework

Chamber Construction: High-grade 304 Stainless Steel with heat-resistant observation window (double-layered).

Chamber Dimensions: Internal dimensions of 1,400mm (L) x 500mm (W) x 1,100mm (H), optimized for heat distribution.

Radiant Panel: Porous ceramic burner inclined at 30° ± 1° to the horizontal specimen plane.

Exhaust Stack: Integrated stainless steel stack with compliant smoke measurement ports.

2. Radiant Heat & Ignition System

Heat Flux Range: Variable output from a nominal maximum of 10.9 kW/m² to a minimum of 1.1 kW/m².

Pilot Burner: Stainless steel ignition source with adjustable flame length (60mm – 120mm) and auto-positioning mechanism.

Gas Control: High-precision Mass Flow Controller (MFC) for gas/air mixture, ensuring stable radiant panel temperature.

Ignition Source: Propane or Natural Gas (subject to local laboratory supply).

3. Measurement & Control System

Heat Flux Meter: Schmidt-Boelter type water-cooled flux meter (range: 0–15 kW/m²; accuracy: ±3%).

Smoke Obscuration: White light source and silicon photodiode sensor system, calibrated to DIN 50055 standards.

Temperature Monitoring: K-type thermocouples for chamber, chimney, and radiant panel monitoring (Accuracy: Class 1).

Data Acquisition: 16-bit high-speed DAQ system with a sampling rate of 1Hz.

4. Software & Interface

User Interface: 10.4-inch Industrial Touchscreen or PC-based Windows software.

Automation: Auto-calibration of radiant heat flux profile and automatic generation of CRF (Critical Radiant Flux) reports.

Data Export: Support for PDF, Excel, and LIMS (Laboratory Information Management System) integration.

5. Installation Requirements

Power Supply: 220V – 240V AC, 50/60Hz, 10A.

Water Cooling: Distilled water or closed-loop chiller for the heat flux meter (Flow rate: > 30L/h).

Gas Supply: Propane (purity > 95%) or Natural Gas; Compressed air (dry and oil-free).

Control System / Software

Computer Control Interface: Utilizes high-end equipment and professionally developed software (LabVIEW), featuring a rigorous interface, high degree of automation, and integrated handling of all complex procedures and calculations. It boasts extremely fast response speed, convenient operation, a user-friendly interface, and intuitive, almost foolproof operation.

Operating Software: Windows operating interface, LabVIEW style, with robust security mechanisms.

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