BS 476-6 Fire Spread Index Tester

INTRODUCTION

BS 476 part 6 specifies a method of test, the result being expressed as a fire spread index, that provides a comparative measure of the contribution to the growth of fire made by an essentially flat material, composite or assembly. It is primarily intended for the assessment of the performance of internal wall and ceiling linings.

FEATURE

• Stainless steel support frame andCalcium silicate board combustion chamber.

• Three kinds of sample holders for different thickness of the specimens.

• Low reflective black finished mild steel Chimney and Cowl assembly complete with thermocouple mounting points.

• Compliant stainless steel gas burner.

• Two K type mineral insulated thermocouples complete with ceramic insulators.

• Two pencil type heaters with 1000w installed in combustion chamber.

• Control gas instrumentation including electronic gas on/off valve, flow regulating valve, flow meter and manometer.

• Intelligent single phase power controller with feedback loop for accurate control of electric heating elements

• DAQ record automatically the mV output from the thermocouples of the flue gas throughout the duration of the test.

• According to the test time, automatically adjust the output power.




Data Acquisition system:




• Prompted software interface

• Data recording and display of cowl temperature against time

• Data recording and display of ambient temperature against time

• Display of power value in kW

• Calibration routine

• Calculation of output rise and calibration value




Installation requirements

Electrical	230 volts Nominal 10 Amps
Ambient Temperature	10°C to 35°C
Gas supplies	The gas supply specified in the Standard is Standard test gas G112, as specified in BS 4947
Flow	Gas flow for burner adjustable from 0 to 5 nl/min
Pressure	1KPa
Dimensions	Apparatus: 400mm (W) x 600mm x (H) x 300mm (D) Control module: 400mm (W) x 500mm x (H) x 400mm (D)
Weight	46KG
Applicable standards	BS476-6