High Altitude - Hitachi LP-WU9750B User Manual

High Altitude

Use this function to control the projector's cooling fan. You can set it to Off or On. The default setting
is Off.
Under normal circumstances, the projector will operate normally with this function set to Off. By
default, the projector will detect the temperature of the surrounding environment to regulate the speed
of the cooling fan. When the ambient temperature rises, fan speed will increase (generates louder
noise) to make sure the heat inside the projector gets discharged and keep the projector working
normally.
However, if you were to operate the projector in environment of excessive heat or in areas of high
altitude, the projector may automatically shut down. When this happens, you can enable this function
by setting it to high altitude mode 1 or 2 to force the cooling fan to work at a full speed to regulate the
temperature inside the projector. There has 4 different model can choise as following:
•
Normal
Suitable for 0 to 4000ft (0-1219M)
Operation temperture 0 ~35°C -> The Laser light power will 100% active.
Operation temperture 36~40°C-> The Laser light power will 80% active.
•
High 1
Suitable for 4000ft to 5500ft (1219-1676M)
Operation temperture 0 ~30°C -> The Laser light power will 100% active.
Operation temperture 31~35°C -> The Laser light power will 90% active.
Operation temperture 36~40°C -> The Laser light power will 80% active.
•
High 2
Suitable for 5500ft to 10000ft (1676-3048M)
Operation temperture 0 ~25°C -> The Laser light power will 100% active.
Operation temperture 26~30°C -> The Laser light power will 90% active.
Operation temperture 31~35°C -> The Laser light power will 80% active.
Operation temperture 36~40°C -> The Laser light power will 70% active.
• Auto
The projector will automatically sensing the surrounding and will automatic switching the High
Altitude mode.
Note: Due to the air thinning substantially at high altitudes, the result of cooling achieved by the cooling fan is
significantly reduced compared to operation on level ground. With low atmospheric pressure and high operating
temperature, the cooling fan will not be able to disperse the heat adequately
OSD Menu description
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