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RPP Animation
Three test specimens ( 4 x 10 in.) of each test item are prepared
for testing. The thermal resistance of each sample is measured
using the Indacore Radiant Protective Performance (RPP) Test apparatus
according to ASTM F1939 Standard test method for radiant protective
performance of flame resistant clothing materials.
A bank of five, 500 W infrared, tubular, translucent quartz lamps, provides the
radiant heat exposure. Approximately, eighty volts are applied to the quartz
lamps to provide the 2.0 cal/cm2·sec (8.4 watts/cm2)
needed for this test. The instrument is calibrated throughout testing to insure
the delivery of a steady
exposure at 2.0 cal/cm2·sec (8.4 watts/cm2).
The fabric sample is mounted in a sample holder positioned parallel
with the heat source and was protected using a metal shutter before
and after the test run. An instrumented copper disk containing
four iron/ constantan thermocouples measures heat transferred.
This testing apparatus is limited to exposures of 60 seconds or
less.
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