Introduction to the technical indicators of vertical combustion tester

The vertical flame chamber is used to measure the flame retardancy, glow propagation and carbonization properties of fabrics, children's clothing, foam, paper and other materials. The purpose of this manual is to provide guidance for the setup and use of VFC. For sample preparation and test instructions, please refer to the specific test methods.

1. Gas burner, a modified Bunsen burner is provided for the non-pyjama test package. The burner includes a flame height gauge and light guide. For children's pajamas test kits are provided with angled side burners mounted on the side walls of the test chamber.

2. For gas connections, the gas mixture shall be methane, 99% pure, or as specified in the applicable test method. If using a side burner, connect the gas supply line directly to the burner inlet via a customer-supplied pressure regulator. If using a Bunsen burner, connect your gas supply to a manual gas control unit and connect the unit's output wire to the burner inlet

3. Bunsen burner position and flame height. Place the burner in a position so that the center of the burner barrel is directly lower than the center of the specimen. On the burner, relative to the pilot light tube, there is a metal flame height gauge spaced 13 mm (1/2 inch) from the barrel and extending above the burner. The rod has two 8mm (5/16") tips marked 19mm (3/4") and 38mm (1 1/2") above the top of the burner. Use this gauge when adjusting burner flame height according to the applicable test method.

4. Burner operation, use the side burner during testing: hang the empty sample bracket on the support rod of the VFC chamber, and clamp the rear edge of the bracket on the bracket guide rail extending from the back wall of the chamber. Place the burner tube directly under the center of the specimen and adjust the position of the stop ring on the burner (outside the combustion chamber). Slide the burner out (to the right) and light. According to the test method, adjust the burner flame height according to the flame height gauge on the inner wall of the combustion chamber. As before, remove the empty specimen holder and hang the loaded specimen holder in the chamber. Close the hatch and conduct the test in accordance with the applicable test method

1. Set the control mode switch to the automatic position.

2. Prepare your test sample and install it in the appropriate holder within the instrument's test chamber.

3. If possible, place the burner below the sample in accordance with your test method.

4. On the AGC, open the main gas shutoff valve by lifting the toggle lever upward until the toggle lever points outward from the panel. NOTE: Opening this valve allows gas to enter the pilot burner, which must be ignited immediately.

5. Ignite the pilot burner.

6. Close the instrument room door.

7. Press the timer reset button below the run time display on the AGC. If the display is counting, press the timer start button to turn it off. Press the timer reset button to bring the display to zero.

8. To start the test, press the burner start button and timer start button on the AGC simultaneously. (Correct operation will be indicated by illumination of both switches. If neither comes on, press the timer start switch to extinguish the lights, and press the timer reset button below the run time display. Press both start switches simultaneously again to start test.

9. When the timer indicates 15 seconds (HMV) or 12 seconds (VFC), the burner will go out. You can have the elapsed time display continue counting by pressing the timer start button and stop it as needed. You can also stop it using the timer start button, reset it to zero using the timer reset switch, and restart it by pressing the timer start button to time the burn event. Press the timer start button again to stop it.

10. Time the desired events using the runtime display described above or using the handheld event timer provided by the AGC.

11. Additional testing can be performed by repeating steps 6-8 above.

12. When you have finished using the AGC, always close the main gas shutoff valve by pushing the switch lever to the full down position (not pointing out of the panel). Cut off the gas supply to your tank or equipment. Turn off the AGC electrically by moving the control mode switch to the center position.

Main uses: Suitable for measuring the flame retardant properties of clothing fabrics, decorative fabrics, tent fabrics, etc. that have flame retardant requirements. It can be used by the printing and dyeing industry, rubber industry, textile inspection departments and scientific research units.

Instrument characteristics

1. Automatic timing positioning of the burner. 2. The ignition time can be set arbitrarily from 0 to 99.99 seconds. The afterburning time and flame retardant time are automatically recorded and digitally displayed (LCD display is also available). 3. The flame height can be adjusted, and a flame temperature measuring device can be configured. 4. "Push-pull" sample rack fixing device.