Description / Abstract:
The scope of this SAE Recommended Practice is establish uniform
test procedures for passenger cars, to determine whether the system
is defined as a defroster or defogger, and to establish minimum
performance requirements for each system. A defroster for purposes
of this practice is a system which will remove moisture and/or
frost from the interior surface of the backlight at -18 ºC. A
defogger is a system which will remove moisture and/or fog from the
interior surface of the backlight at 4 ºC. The test procedure is
intended to simulate actual conditions by utilizing either a cold
room with an appropriate device to introduce air flow over the
backlight or a sufficiently large wind tunnel with ambient
temperature control. The test procedure and the minimum performance
requirements are based on currently available engineering data.