§ 163.6. Test procedures.
(a) Conditions. Test conditions shall be as follows:
(1) Submit the warning device to the following conditioning sequence, returning the device after each step in the sequence to ambient air at 68°F for at least 2 hours:
(i) Minus 40°F for 16 hours in a circulating air chamber using ambient air which would have not less than 30% and not more than 70% relative humidity at 70°F.
(ii) 150°F for 16 hours in a circulating air oven using ambient air which would have not less than 30% and not more than 70% relative humidity at 70°F.
(iii) 100°F and 90% relative humidity for 16 hours.
(iv) Salt spray (fog) test in accordance with American Society of Testing and Materials Standard B-117, ‘‘Standard Method of Salt Spray (fog) testing,’’ August, 1964, except that the test shall be for four hours rather than 40 hours.
(v) Immersion for 2 hours in water at a temperature of 100°F.
(b) Reflectivity test. The red reflex reflective material shall be tested as follows:
(1) Unless dual purpose material is used, prevent the orange fluorescent material from affecting the photometric measurement of the reflectivity of the red reflex reflective material, either by separation or masking.
(2) Use a lamp with a tungsten filament operating at 2856° Kelvin color temperature as the source of illumination.
(3) Place the source of illumination 100 feet from the red reflex reflective material, Figure 2 of Appendix A.
(4) Place the observation point directly above the source of illumination, Figure 2 of Appendix A.
(5) Circulate the total candlepower per incident foot candle of the red reflex reflective material at each of the entrance and observation angles specified in Table 1 of Appendix A.
(c) Luminance test. The orange fluorescent material shall be tested as follows:
(1) Unless dual purpose material is used, prevent the red reflex reflective material from affecting the photometric measurement of the luminance of the orange fluorescent material.
(2) Using a 150 watt high pressure xenon compact arc lamp as the light source, illuminate the test sample at an angle of incidence of 45° and an angle of observation of 90°. If dual purpose material is being tested, illuminate the sample diffusely through an integrating sphere.
(3) Measure the luminance of the material at a perpendicular viewing angle, with no ray of the viewing beam more than 5° from the perpendicular to the specimen.
(4) Repeat the procedure for a flat magnesium oxide surface, and compute the quotient (percentage) of the luminance of the material relative to that of the magnesium oxide surface.
Cross References This section cited in 67 Pa. Code § 163.5 (relating to requirements).
APPENDIX A
WARNING DEVICE
DEMENSIONS OF WARNING DEVICE (Inches)
Figure 1
APPENDIX A (Continued)
APPENDIX A (Continued)
FIGURE 4. Chromaticity Diagram
[39 FR 28636, Aug. 9, 1974, as amended at 40 FR 4, Jan. 2, 1975]
Cross References This appendix cited in 67 Pa. Code § 163.4 (relating to definitions); 67 Pa. Code § 163.5 (relating to requirements); and 67 Pa. Code § 163.6 (relating to test procedures).
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