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.

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 Bto 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.

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)

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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