ZY6242 SBI Single Item Combustion Tester for Building Materials or Products
Highlights
Integrated SBI Testing System
The system combines the combustion room, specimen trolley, fixing frame, burners, collection hood, collector, exhaust duct, smoke sampling system, comprehensive measurement section, gas analysis and computerized data acquisition into one complete SBI testing solution.
Optical Smoke Measurement System
A white-light extinction system measures smoke development in the exhaust duct. The optical measurement covers the 400–750 nm visible spectrum, with a light transmittance accuracy of 0.01%, optical density range of 0–4, and smoke density accuracy of ±1%.
Automatic Exhaust Flow Control
The exhaust system operates within a specified flow range of 0.50–0.65 m³/s at 298 K. Fan speed is automatically adjusted by computer-controlled variable-frequency regulation to maintain the required exhaust conditions.
Accurate 30.7 ± 2.0 kW Burner Heat Output
Two identical sandbox burners are provided as the main and auxiliary burners. Propane is supplied through the burner to generate a specified heat output of 30.7 ± 2.0 kW.
Precision Propane Mass Flow Control
A digital mass flow controller with a range of 0–2.3 g/s provides precise propane control. Within the 0.6–2.3 g/s range, the specified accuracy is 1%, with 4–20 mA signal output and computer-based control.
Automatic Data Acquisition Every 3 Seconds
Test data are automatically recorded and stored at 3-second intervals, including propane mass flow, duct differential pressure, relative optical density, O₂ concentration, CO₂ concentration, ambient air temperature and temperatures in the measurement section.
Computer + Manual Dual Control
The system uses dedicated LabVIEW-based software and a data acquisition/control card for real-time curves, automatic data acquisition and processing, result storage, output and fault alarms. Manual operation is available as a backup in the event of a computer abnormality.
Calibration, Data Recall and Report Functions
The control system incorporates sensor and system calibration functions. Previous test data can be reloaded for recalculation and report generation, and interrupted tests can be identified and subsequently continued. The equipment also supports heptane calibration for system verification.
Method
SBI Reaction-to-Fire Test
The ZY6242 is designed to perform the Single Burning Item (SBI) test according to EN 13823:2020.
Two specimen wings are installed vertically at right angles on the specimen trolley. The long wing is approximately 1.5 m high and the short wing approximately 1.0 m wide as specified by the test arrangement. A propane sandbox burner is positioned at the bottom of the vertical corner formed by the specimens.
During the test, combustion gases and smoke generated by the specimen are collected through the hood and transferred through the insulated exhaust duct to the comprehensive measurement section.
The system continuously measures and records parameters including:
- Propane mass flow
- Exhaust duct differential pressure
- Exhaust gas temperature
- Ambient temperature
- O₂ concentration
- CO₂ concentration
- Relative optical density / smoke density
- Heat release data
- Smoke production data
- THR600s
- FIGRA
- Mass loss related test data
The auxiliary burner is ignited at 120 ± 5 s, with the propane mass flow adjusted to 647 ± 10 mg/s. At 300 ± 5 s, the propane supply is transferred from the auxiliary burner to the main burner. Burner switching response time is no more than 12 s.
The computerized acquisition system automatically records the required measurement channels and allows the test data to be processed, stored, recalled and used for report generation.
Specifications
| Component | Configuration |
|---|---|
| Test System | SBI reaction-to-fire test system compliant with EN 13823:2020 |
| Combustion Chamber | Internal dimensions: (3.0 ± 0.05) × (3.0 ± 0.05) × (2.4 ± 0.05) m |
| Burner System | Main and auxiliary propane sandbox burners, heat output 30.7 ± 2.0 kW |
| Gas Supply System | Commercial propane ≥95% purity; mass flow controller range 0–2.3 g/s |
| Exhaust System | Ø315 ± 5 mm insulated exhaust duct; exhaust flow rate 0.50–0.65 m³/s at 298 K |
| Pressure Measurement | Differential pressure range 0–200 Pa; accuracy ±1 Pa |
| O₂ Measurement | Paramagnetic O₂ analyzer, measuring range 0–25%, T90 <6 s |
| CO₂ Measurement | NDIR CO₂ analyzer, measuring range 0–10%, response time ≤6 s |
| Smoke Measurement | White-light extinction system, optical density 0–4, smoke density accuracy ±1% |
| Temperature Measurement | K-type thermocouples, measuring range 0–400°C, accuracy ±0.5°C |
| Data Acquisition | Automatic data recording every 3 s; time recording accuracy 0.1 s |
| Control System | Computer and manual dual control with LabVIEW-based test software |
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