promethean activboard 300 pro series, Руководство пользователя

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Three Suggestions Increase Bulb Life
• Use the lowest brightness setting possible, set the projector to long bulb life instead of high
brightness.
• Check/clean the filter often. Check once a week initially, and increase time between checks
until it gets to the point you see dust on the filter, then clean at that interval. Don't wait
until it is fully caked over.
• Turning the projector on/off repeatedly throughout the day is usually harder on the bulb
than leaving it on. If the projector will be unused for 30 minutes or more, turn it off. If less
than 30 minutes, leave it on. You try heating from 80 degrees to 2000 degrees several
times a day and see how you feel :)
▫ Many people ask why #3 is important. Most projectors have a voltage ramp that starts the
bulb up and increases it to full brightness. That voltage ramp is calibrated for room
temperature, and doesn't change. So if you start a bulb up hot, the voltage ramp acts as if the
bulb is cold and hits the bulb with the wrong voltages at the wrong times, shortening the life.
▫ Some sources say to wait at least an hour before restriking a bulb, but that usually isn't
feasible. Most projector lamps take at least 15 minutes to reach stable operating temperature,
and at least 15 minutes after power-down to reach stable storage temperature, regardless of
the fan cycle on the projector. So the most vulnerable time for the bulb is 15 minutes after
power-up and 15 minutes after power-down.