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Operation Guide 3239/3240
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Auto return features
If you leave a screen with flashing digits for two or three minutes without performing
any operation, the watch automatically saves any settings you have made up to that
point and exits the setting screen.
Data and Setting Scrolling
The D button is used to scroll through setting screen data on the display. Holding
down this button during a scroll operation scrolls through the data at high speed.
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Specifications
Accuracy at normal temperature: ±30 seconds a month
Timekeeping: Hour, minutes, seconds, p.m. (P), year, month, day, day of the week
Time system: Switchable between 12-hour and 24-hour formats
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Alarm: Multi-function ∗ alarm (One-time or 7-time snooze); Hourly Time Signal
∗ Alarm type: Daily alarm, date alarm, 1-month alarm, monthly alarm
Stopwatch
Measuring unit: 1/100 second
Measuring capacity: 23:59' 59.99''
Measuring modes: Elapsed time, split time, two finishes
Dual Time: Hour, minutes, seconds, p.m. (P)
Other: Backlight (light-emitting diode)
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Backlight Precautions
The backlight uses an LED (light-emitting diode) and a light guide panel that cause
the entire display to glow for easy reading in the dark.
In any mode, press B to illuminate the display for about one second.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
• The backlight automatically stops illuminating whenever an alarm sounds.
• Frequent use of the backlight shortens the battery life.
Battery: One lithium battery (Type: CR2025)
Approximately 10 years on type CR2025 (assuming alarm operation 10 sec./day,
and one backlight operation 1.5 sec./day)
Frequent use of the backlight shortens the battery life.
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