Casio pv-s660 User Manual

23

Chapter 1 Getting Acquainted

Tapping the 

 icon beneath the PV Unit screen illuminates the display screen

for easy viewing in the dark. You can specify a duration of 15 seconds or 30
seconds for the backlight.

1. While the Mode Menu or Action Menu is on the display, tap Menu Bar

to display the menu bar, and then tap Option – Screen Options.

2. On the configuration screen that appears, tap the box next to “Backlight

time” to toggle it between 15sec (15 seconds) and 30sec (30 seconds).

3. Tap Set to register your setting.

•

Tapping the 

 icon while the backlight is on turns it off.

•

The backlight may fail to turn on when battery power is low and during
data communication.

•

Frequent use of the backlight shortens battery life. The following shows
how backlight use affects battery life under controlled test conditions.*
For comparison with the values below, battery life is normally about
180 hours of continuous display in the Contacts Mode when no backlight
operation is performed.

* Test Conditions
•

“Battery Life” is the number of hours before battery failure when
the unit is left on (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.

3 minutes per hour

Approximately 80 hours

15 minutes per hour

Approximately 35 hours