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Auto-Ignition Resistance

The hottest parts of the tested Westinghouse WH7500E generator while operating was found to be the exhaust pipe and areas of the muffler near the exhaust outlet. The temperature of these locations was observed to be as high as 270°C (as shown to the right). It can be assumed that these areas would be hotter at higher ambient temperatures, so a temperature approximately 30°C higher was used for auto-ignition determination.

Auto-Ignition Resistance Testing GenTent Fabric, Thread and Velcro®

A thermocouple attached to an Omega HH309 Data Logger Thermometer was secured to a 6” x 6” x 1/4” steel plate with a 500 gram weight. The plate was then heated to approximately 300°C before a coupon approximately 2” x 3” of sample GenTent skirt material was placed near the center of the hot steel plate.

300C Test observation at 15 seconds (left) and 2 minutes (right)

The sample coupon very quickly began to melt and produced a small amount of smoke, but did not ignite.

Auto-Ignition Resistance Testing GenTent Clamp and Rubber Sleeve

A thermocouple attached to a Omega HH309 Data Logger Thermometer was secured to a 6” x 6” x 1/4” steel plate with a 500 gram weight. The plate was then heated to approximately 300°C before a set of clamp assembly was placed near the center of the steel plate. The set of clamp was disassembled to three parts (metal parts were removed) and randomly placed on the heated plate since each part seemly made by the same material. Except some contact area with the heated plate were melted, no ignition on any tested part was observed during the test.

300C Test observation at 15 seconds (left) and 5 minutes (right)