Building Material Flammability Test Furnace, ISO 11925-2 Flammability Tester

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Parameters

Stainless steel plate box	1.5mm
Bunsen burner	can be adjusted forward and backward
Diameter of burner	Φ 0.17mm burner with regulator; four ￠4mm air suction inlet
Flame length of Bunsen burner	20mm ± 2mm
Ignition source	can be automatically tilted by 45 degrees
The Bunsen burner applies a flame time	15s to the pattern
Flame height	Adjusted by precision adjustment valve
Sample rack	can move up and down and back and forth
Sample holders	2 pcs
Touch screen display	7 inches Effective display size 15.5cm in length and 8.6cm in width
Resolution	800 * 480
Communication interface	RS232. 3.3V CMOS or TTL, serial port mode
Storage capacity	1G
FPGA driver display	"zero" start time, can run after power on
Controller	adopts low energy consumption processor, and automatically enters energy saving mode
Gas source	>95% propane gas;(user should provide for themselves)
Gas pressure	10kpa~50kpa
Flue air velocity	0.7m/s only on condition of burner burning and draught hood open
Time adjustment of continuous flame	0 ~ 99minutes99seconds
Time adjustment of afterflame	0 ~ 99minutes99seconds
Timer accuracy	≤1s/h
Ambient temperature	15 ℃ ～ 25 ℃;
Relative humidity	≤ 85%
Cabinet size	835 × 400 × 815mm
Power supply voltage and power	220 V, 50 Hz, 100 W

Accessoriess

1. Building Material Flammability Tester 1 unit

2. Power cord 1 piece

3. Gas pipe (with clamp) 1 piece

4. Clamps 2 sets

5. Flame height measuring device 1 unit

6. Flame positioner 2 units

7. Stainless steel wind speed device (optional) 1 set

8. Product manual 1 copy

9. Product certificate of conformity 1 piece

Test Procedures

I. Equipment Installation and Preparation

Accessory Check: Confirm that the included accessories include the sample holder, positioning device, drip tray, flame ruler, gas valve, and gas pipe. If a wind speed device is selected, an additional power supply needs to be connected, and the wind speed should be adjusted to 0.7 ± 0.1 m/s.

Gas and Power Connection: Install the valve onto the gas cylinder (the safety valve needs to be opened manually), and connect the equipment's power and gas supply. If a wind speed meter is equipped, calibrate the airflow direction and insert it into the temperature measurement port.

II. Operating Procedure

Parameter Settings: Set the experiment time (usually 15 seconds or 30 seconds) via the touchscreen interface, and select whether to enable the "automatic ignition" or "automatic gas shut-off at the end of the experiment" function.

Sample Installation: Use the sample holder to fix the material (usually 250mm × 90mm), and adjust the flame contact position using the positioning device (e.g., 40mm from the bottom edge).

Flame Adjustment: Start the gas and ignite the flame, adjust the Bunsen burner to a 20 ± 2mm blue flame, and tilt it 45 degrees towards the sample.

III. Experiment Execution and Observation

Start Experiment: After clicking "Start," the burner contacts the sample and the countdown begins. Observe the combustion phenomena (e.g., surface ignition, burning to the marked line).

Data Recording: Save the data after the experiment, turn off the gas, and check the sample's combustion status (e.g., remaining length, whether dripping material ignites the filter paper).

IV. Safety and Maintenance

Operating Procedures: Avoid putting hands into the test furnace, and do not stack flammable materials around the equipment. Stop the machine immediately in case of any abnormalities.

Regular Calibration: Calibrate the heat load uniformity (4-point temperature difference ≤ 15℃) and wind speed (5-point measurement error ≤ 10%) every 3 months.

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