Introducing the new TPP and RPP Test Devices
Last week, MTNW engineers completed testing and installing two new exciting products for a customer in the Eastern USA:
Both devices were developed to measure the time elapsed for convective and/or radiant heat to penetrate through a protective composite fabric system - resulting in damage to human skin.
The new TPP and RPP models include features not available in units built by other manufacturers, such as automatic (or manual) test operation, support for up to three copper disk calorimeter sensor assemblies, and an integrated air-cooled sensor stand that quickly prepares calorimeter sensors for next test.
The TPP’s propane burner system includes flame detection auto ignition, plus a mass flow controller and panel for monitoring gas pressure and usage. A tinted acrylic shield (not shown) protects the operator, while software safety interlocks monitor water flow, carriage position, and burner ignition. During testing, our ThermDAC control software will continuously record and display a real-time graph of the average temperature rise, depicted as a curved line representing higher and higher temperatures as heat penetrates through the composite fabric materials to the sensor. After the test is completed, the results are automatically compared to Stoll's curve, which represents the blister point of human skin as a function of heat and time.
The point of intersection between these two curves provides the composite fabric's TPP (or RPP) rating. The TPP complies with the NFPA 2112, ASTM F2700, ASTM F2703, and ISO 17492 test standards.