Casio IT-2000W - Manual (Page 91)

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6.4 Sensor Control
This terminal has the following three types of sensors installed to serve as dedicated devices for
handy terminal.
Sensor Purpose of Use
Temperature sensor Detects the temperature inside the main unit. This result will be
used to automatically compensate the LCD brightness.
Illumination sensor Detects the ambient light intensity to automatically turn on and
off the backlight.
This function is called the Auto Backlight Control (ABC)
function, and it can be enabled or disabled with the System
Menu or application programs.
Remaining battery voltage
sensor Used to acquire the remaining battery voltage. Application
programs can obtain this value via the APM BIOS.