Module No. 1850/2284
1850/2284-1
GENERAL GUIDE
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Press C to change from mode to mode.
The animation area shows different animated characters and graphics, depending on the mode and the operation being performed.
Pressing C while in the Alarm Mode causes the current date’s moon age screen to appear for about one second, followed by the Timekeeping Mode screen.
The operational procedures for Module 1850 and 2284 are identical. All of the illustrations in this manual show Module 1850.
Timekeeping Mode
Countdown Alarm Mode
Stopwatch Mode
Alarm Mode
(Moon Age Screen)
Animation area
Press C.
Moon age
[Module 2284]
[Module 1850]
TIMEKEEPING MODE
About the backlight
This section provides information on setting the time and using the backlight.
Month Screen
Day of the week Screen
Animation area
Graphic area
Month
Day
Day of week
Day
Press B.
A backlight that uses an EL (electro-luminescent) panel causes the entire display to
glow for easy reading in the dark. Depending on the mode, pressing E or B turns
on the backlight for about three seconds. See the sections that cover each mode for
information on whether you should press E or B.
• The backlight of the watch employs an electro-luminescent (EL) light, which loses
illuminating power after very long use.
• The illumination provided by the backlight may be hard to see when viewed under
direct sunlight.
• The watch will emit an audible sound whenever the display is illuminated. This is
caused by a transformer that vibrates when the EL panel lights up. It does not
indicate malfunction of the watch.
• The backlight automatically turns off whenever an alarm sounds.
Seconds
PM indicator
Hour : Minutes
• In the Timekeeping Mode, press B to switch between the day of the week and
month screens.
• In the Timekeeping Mode, press E to illuminate the display for about three seconds.
• In the Timekeeping Mode, press D to switch between the 12-hour and 24-hour
formats.
• When the 12-hour format is selected, “p.m.” times are indicated on the display by P,
while “a.m.” times are indicated by A. No indicators are used with the 24-hour format.
• The graphic area of the Timekeeping Mode screens shows patterns that indicate
the passage of seconds.
To set the time and date
1. Hold down A while in the Timekeeping Mode until the seconds digits start to flash
on the display. The seconds flash because they are selected.
2. Press C to change the selection in the following sequence.
Seconds
Hour
Minutes
Day
Month
Year
The animation area of the Timekeeping Mode normally
shows the current date’s moon phase. Different animated
Star
Moon phase figures appear at 00 and 30 seconds.
• The moon phase shown in the animation area is that as
viewed on the current date from a point in the northern
hemisphere looking south. Note that the left-right orientation of the moon phase shown on the display may differ from that of the actual moon.
• The left-right orientation of the moon phase is reversed
when viewing from the southern hemisphere or from a
point near the equator.
• Note that the moon phase is based on the date as set in
the Timekeeping Mode. The moon phase will not be
correct if the date is not set correctly.
• The stars in the animation area twinkle with each passing second.
• The accuracy of moon age calculations by this watch is ±2 days.
• The following shows how the different moon phases are represented in the animation area.
Animation area
Minutes
Seconds
1/10 second
Timer 1
Animation Area
Moon Age
0 and 1
New Moon
2 to 5
6 to 9
10 to 13
First Quarter
(waxing)
Animation Area
17 to 20
21 to 24
Last Quarter
(waning)
25 to 28
14 to 16
Full Moon
29
New Moon
Timer 2
Timer 3
• Pressing D does not change the timer selection if a countdown timer operation is
currently in progress or is paused. You must stop the ongoing countdown operation
before you can change to another timer.
2. Press E to start the countdown timer.
• When the countdown reaches zero, an alarm sounds for 10 seconds or until you
stop the alarm by pressing any button. The countdown time is automatically reset to
its starting value after the alarm stops.
• Press E while a countdown operation is in progress to pause it. Press E again to
resume the countdown.
• To completely stop a countdown operation, first pause it (by pressing E), and then
press D. This returns the countdown time to its starting value.
To change a countdown time
1. Press D while in the Countdown Alarm Mode to select the timer whose time you
want to change.
2. After you select a timer, hold down A until the minutes digits start to flash on the
display.
3. Press D to increase the minutes. Holding down D changes the minutes at high
speed.
4. After you set the countdown time, press A to return to the Countdown Alarm Mode.
• If you do not operate any button for a few minutes while the minutes digits are
flashing, the flashing stops and the watch goes back to the Countdown Alarm Mode
automatically.
About countdown indicators
An audible beep, the EL backlight, and the graphic area on the display keep you
informed about the progress of the countdown as noted in the following table.
Indication
Beep
Backlight
Moon Phase
Name
whose starting time can be set in one-minute increments.
When the countdown reaches zero, an alarm sounds.
• In the Countdown Alarm Mode, press B to illuminate
the display for about three seconds. To illuminate the
display while setting the countdown time (while the minutes digits are flashing), press E.
• The starting times of the countdown timers are preset to
15, 30, and 60 minutes when you purchase it. You can
use these settings as they are, or you can change to
different starting times if you want.
1. Press D while in the Countdown Alarm Mode to select the timer whose time you
want to use.
Animation Area
Moon Age
Graphic area
To use a countdown timer
3. While the seconds digits are selected (flashing), press D to reset the seconds to
00.
• If you press D while the seconds count is in the range of 30 to 59, the seconds are
reset to 00 and 1 is added to the minutes. If the seconds count is in the range of 00
to 29, the minutes count is unchanged.
4. While any other digits (besides seconds) are selected (flashing), press D to increase the number. Holding down D changes the current selection at high speed.
5. After you set the time and date, press A to return to the Timekeeping Mode.
• The day of the week and moon age are automatically set in accordance with the
date.
• The date can be set within the range of January 1, 1995 to December 31, 2039.
• If you do not operate any button for a few minutes while a selection is flashing, the
flashing stops and the watch goes back to the Timekeeping Mode automatically.
Moon Phase
Name
COUNTDOWN ALARM MODE
Timer No. The Countdown Alarm Mode has three 60-minute timers
Mode indicator
Indication
Graphic Area
Start
5'00"0
1 second
1 second
1 second
1 second
More than
5 minutes
Less than
5 minutes
Time Up
10 seconds
2 seconds
Time Up
1850/2284-2
To turn an alarm and the Hourly Time Signal on and off
STOPWATCH MODE
Mode indicator
The Stopwatch Mode lets you measure elapsed time, split
times, and two finishes. You also get Auto-Start function.
The range of the stopwatch is 59 minutes, 59.99 seconds.
• In the Stopwatch Mode, press B to illuminate the display for about three seconds.
G-SHOCK mark
Graphic area
To measure elapsed time
Minutes
Seconds
1. Press E to start the stopwatch.
2. Press E to stop the stopwatch.
• You can resume the measurement operation by pressing E again.
3. Press D to clear the stopwatch to all zeros.
1/100 second
Alarm on indicator
Alarm 3 (on)
Alarm 4 (off)
Alarm 2 (off)
To record split times
1. Press E to start the stopwatch.
2. Press D to display the timing up to that point. Stopwatch timing continues internally.
3. Press D to clear the split time and to continue time measurement on the display.
• You can repeat steps 2 and 3 as many times as you want.
4. Press E to stop the time measurement.
5. Press D to clear the stopwatch to all zeros.
To time first and second place finishes
1. Press
2. Press
3. Press
4. Press
5. Press
E
D
E
D
D
to start the stopwatch.
when the first finisher crosses the line, and record the time.
when the second finisher crosses the line.
to display the finishing time of the second finisher.
again to clear the stopwatch to all zeros.
About the Auto-Start function
With the Auto-Start function, the watch performs a 5-second countdown. When the
countdown reaches zero, stopwatch operation starts automatically. During the final
three seconds of the countdown, a beeper sounds with each second.
To use the Auto-Start function
1. While the stopwatch display is showing all zeros
(00'00"00) in the Stopwatch Mode, press D.
• At this time the auto-start indicator appears on the display to indicate that auto-start is on. Press D again to
turn auto-start off (indicated when the auto-start indicator is not on the display).
2. Press E to start the countdown.
• Pressing E also causes the countdown time to appear
on the display.
• When the countdown reaches zero, a tone sounds, the
Auto-start indicator
backlight illuminates the display, and a stopwatch timing operation starts automatically.
• To stop the Auto-Start countdown and return to the all-zeros display, press D.
• Pressing E while the Auto-Start countdown is in progress immediately starts the
stopwatch.
ALARM MODE
Alarm No. Five independent Daily Alarms can be set. Each alarm
lets you set the hour and minutes. When the Daily Alarm
Graphic area
Mode indicator
is turned on, the alarm sounds for 20 seconds at the preset time each day. Press any button to stop the alarm
after it starts to sound.
When the Hourly Time Signal is turned on, the watch beeps
every hour on the hour.
• In the Alarm Mode (including alarm time setting), press
E to illuminate the display for about three seconds.
• The graphic area in the Alarm Mode shows the current
on/off status of each of the five alarms.
Hour : Minutes
Alarm on indicator
AM indicator
To set an alarm time
1. Press D while in the Alarm Mode to select the alarm whose time you want to set.
Alarm 1
Alarm 2
Alarm 3
Hourly Time Signal
Alarm 4
Alarm 5
2. After you select an alarm, hold down A until the hour digits start to flash on the
display. The hour digits flash because they are selected.
• This operation automatically turns on the alarm.
3. Press C to change the selection in the following sequence.
Hour
Minutes
4. Press D to increase the selected digits. Holding down D changes the selection at
high speed.
• The format (12-hour and 24-hour) of the alarm time matches the format you select
for normal timekeeping.
• When setting the alarm time using the 12-hour format, take care to set the time
correctly as a.m. (A indicator) or p.m. (P indicator).
5. After you set the alarm time, press A to return to the Alarm Mode.
• If you do not operate any button for a few minutes while a selection is flashing, the
flashing stops and the watch goes back to the Alarm Mode automatically.
1. In the Alarm Mode, press D to select an alarm or
the Hourly Time Signal.
2. Press B to toggle the select item on and off.
• The indicators ALM and
appear on the display
whenever an alarm is turned on.
• The indicators SIG and
appear on the display
whenever the Hourly Time Signal is turned on.
• Indicators in the graphic area of the Alarm Mode
show which alarms are turned on.
• In other modes (besides the Alarm Mode), the ALM
indicator remains on the display as long as at least
one of the alarms is on, while the SIG indicator remains on the display while the Hourly Time Signal
is on.
To test the alarm
Alarm 1 (on)
Alarm 5 (off)
Hold down B while in the Alarm Mode to sound the
alarm.
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