2-3. Backlight Operation (BN-20 only)
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About the EL backlight (BN-20 only)
• The BN-20 is equipped with an EL backlight that allows easy viewing of display contents in a theater, or anywhere else where lighting is dim.
• Note, however, that frequent or extended use of the EL backlight shortens battery life.
The following shows how backlight use affects battery life under controlled test conditions*.
Backlight Operation Battery Life
3 minutes per hour Approximately 65 hours
15 minutes per hour Approximately 35 hours
* Test Conditions
• “Battery Life” is the number of hours before battery failure when the unit is left on with 5 minutes of a processing operation and 55 minutes of continuous display only (no processing operation) per hour in the CONTACTS Mode, plus the backlight operation described below. The above values assume ambient temperature of 20
°
C, starting with a fresh set of new batteries.
• “Backlight Operation” is the number of minutes backlight is turned on per hour during the display only (no processing operation) period.
• Be sure to use alkaline batteries. Manganese batteries provide very short battery life.
Important!
• Note that pressing SHIFT and then LIGHT causes the backlight to light and stay lit as long as you continue to operate the BN Unit, or until you press LIGHT again to turn it off manually.
Leaving the backlight on for long periods greatly reduces battery life!
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Backlight Operation (BN-20 only)
The electro-luminescent backlight of the BN-20 Unit helps to keep your on-screen data bright and easy to read at all times. There are two different operations you can use to turn on the backlight. One turns the backlight on for about 15 seconds, while the other procedure leaves the backlight on as long as you keep operating the keyboard.
Leaving the backlight on for long periods greatly reduces battery life!
To turn on the backlight for 15 seconds
Press the LIGHT key to turn on the backlight. The backlight will turn off automatically after about 15 seconds.
Pressing LIGHT while the backlight is lit turns it off.
To leave the backlight on as long as you input data
Press SHIFT and then LIGHT to turn on the backlight. In this case the backlight will remain on as long as you continue to press keys. It turns off automatically if you do not perform any key operation for about 15 seconds.
Notes
• The backlight will turn off automatically and not turn on when the LIGHT key is pressed while data communication operation is in progress.
• The backlight may also suddenly turn off and fail to turn back on whenever battery power is low.
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