§1209.8. Procedure for calibration of radiation instrumentation. — Inbound Citations

(a) Test chamber (Figures 3 and 4 paragraph (b) of this section). An air-gas fueled radiant heat energy panel or equivalent panel inclined at 30° above and directed at a horizontally-mounted attic floor insulation specimen. The radiant panel generates a radiant energy flux distribution ranging along the approximately 100-cm length of the test specimen from a nominal maximum of 1.0 W/cm. 2 to a minimum of 0.1 W/cm 2. The test is initiated by open flame ignition from a pilot burner. The distance burned to flame-out is converted to W/cm 2 from the flux profile graph (Figure 8) and reported as critical radiant flux, W/cm 2. Section 1209.8 provides a procedure for calibrating the radiation pyrometer used to standardize the thermal output of the panel.