This is a test of my rare First Alert SA150LT. This unit was made in 1990, and is one of the earliest copies of it, as indicated by the yellow Light Test button. In 1991 they changed to the more well-known gold button and used a bigger photodiode to make the Light Test feature more functional (Because on this older one the photodiode is so small it doesn't pick up that well). I may not have this for much longer because this thing was an entire PITA to do, the piezo kept rasping when I was trying to do this, leading me to speculate it might be on its way out. If anyone knows how I can fix that if I need to, please let me know.
Негізгі бет First Alert SA150LT Test
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