Smoke from the Burning or Decomposition of Plastics | ASTM D2843
Compliance
ASTM D2843
The Smoke Density Tester (Smoke from the Burning or Decomposition of Plastics), in accordance with ASTM D2843, is designed for measuring and observing the relative amounts of smoke obscuration generated by the burning or decomposition of plastics under controlled conditions.
Summary of the ASTM D2843 Test:
During the test, a 25mm by 25mm by 6mm specimen is placed on the support specimen holder, apply a propane burner flame (also auxiliary burner flame to molten material drops if needed) to the specimen, and burning is performed inside the 300mm by 300mm by 79mm test chamber, the chamber is instrumented with a light measurement system and EXIT sign on its back. The test is performed for 4mins, the light-absorption data are plotted versus time and the obscuration of the EXIT sign shall be recorded. Two indexes are used to rate the material: the maximum smoke produced and the smoke-density rating.
ASTM D2843 Test
Exit Sign Test Apparatus consists of
Stainless steel test chamber, the dimension is 300mm by 300mm by 790mm.
The internal wall of the test chamber is coated with Teflon painting for anti-corrosion, also reducing the light reflection.
The back of the internal chamber wall is fitted with an EXIT sign in red letters on a withe background, through the transparent observation window, the tester can distinguish the clear and blurred state of the specimen.
The light source for testing is the incandescent type lamp, the photoelectric sensor is the silicon type photodiode, the silicon photodiode has the function of cosine calibration, at the same time equipped with color filters, filter out the ultraviolet and infrared light which cannot be recognized by human eyes.
Provides a fan on the test chamber to exhaust the combustion gas after the test.
The main burner for flame impingement on test specimens is supplied with propane gas at 276 KPa pressure.
The auxiliary burner for flame impingement on molten material drops is supplied with propane gas at 138 KPa pressure.
Data acquisition system, record light transmittance every 15 seconds.
Standard English operation software, includes the functions of system calibration, standard test procedure, and test data & report management.
The software can quickly calibrate the light system.
The software can test according to ASTM D2843 procedure.
The software can export the test report and raw data as per ASTM D2843 required.