MA1812-EA
© 2019 CASIO COMPUTER CO., LTD.
Quick Reference Manual 5588
Congratulations upon your selection of this CASIO watch.
To ensure that this watch provides you with the years of service for which it is designed,
carefully read and follow the instructions in this manual, especially the information under
“Operating Precautions” and “User Maintenance”.
Be sure to keep all user documentation handy for future reference.
Bluetooth® is a registered trademark or trademark of Bluetooth SIG, Inc. of the United
States.
This product has a Mobile Link function that lets it communicate with a Bluetooth®
capable phone to perform automatic time adjustment and other operations.
x This product complies with or has received approval under radio laws in various
countries and geographic areas. Use of this product in an area where it does not
conform to or where it has not been approved under applicable radio laws may be
punishable under local laws. For details, visit https://world.casio.com/ce/BLE/.
x Use of this product inside of an aircraft is restricted by the aviation laws of each
country. Be sure to obey instructions provided by flight personnel concerning use of
devices such as this product.
Visit the website below for the operation
manual (Operation Guide) of this watch.
https://world.casio.com/manual/wat/
Using the Watch
Charging
Remove the watch from your wrist and place it in a brightly lit area.
x The watch may become hot when exposed to light for charging. Take care to avoid
burn injury.
x Avoid charging in locations where it is very hot.
Power Saving
x Leaving the watch in a dark location for about one hour between the hours of 10p.m.
and 6a.m. will cause the second hand to stop at 12o’clock.
x Leaving the watch in a dark location for about one week will cause all hands to stop.
Battery Alerts
x Low Battery
Second hand jumps every two seconds (Low Battery Alert).
x Dead Battery
All hands stopped.
General Guide
1
2
3
4
5
6
* Hold down B for at least 2.5 seconds to establish a Bluetooth connection with a phone.
Selecting a Mode
Each press of C cycles between modes as shown below.
x Hold down C for at least one second to enter the Calendar Mode.
Calendar Mode Stopwatch
7
8
9
10
Crown
11
30
Click 1
12
13
Mode
C CC
1. E///F: Battery status
2. Day of the week: SU, MO, TU, WE,
TH, FR, SA
3. Hour and minute hands: Current time
4. Bluetooth connection: C*
5. Alarm status: ON, OFF
6.
Click 2
• Auto adjust: Enabled (YES)/
Disabled (NO)
• Auto adjust: Successful (YES)/
Failed (NO)
7. Mode: ST (Stopwatch), TR (Timer),
AL (Alarm)
8. Auto summer time: AT
9. Standard time: STD
10.
Summer time: DST
11.
Time signal reception in progress
12.
Dual Time dial
13.
Current setting a.m./p.m.
(when setting the time): A, P
Timer Mode Alarm Mode
C
Setting the Time
1. Rotate the crown towards you to loosen it.
2. Pull the crown out to the second click.
3. Hold down C for at least one second.
x This enables setting of the hour and minute.
4. Rotate the crown to change the current hour and minute setting.
x The second hand will indicate a.m. (A) or p.m. (P).
5. Press C.
x This enables the year 10’s digit setting.
6. Rotate the crown to change the year 10’s digit setting.
7. Press C.
x This enables the year 1’s digit setting.
8. Rotate the crown to change the year 1’s digit setting.
9. Press C.
x This enables the month setting.
10.
Rotate the crown to change the month setting.
11.
Press C.
x This enables the day setting.
12.
Rotate the crown to change the day setting.
13.
After the settings are the way you want, push the
crown back in and then screw it securely into place.
Changing the Dual Time, Alarm Time, or Timer Time Setting
1. Use C to navigate to the mode whose time setting you
want to change.
2. Rotate the crown towards you to loosen it.
3. Pull the crown out to the first click.
4. Rotate the crown to move the hands to the time you want to set.
5. After the setting is the way you want, push the crown
back in and then screw it securely into place.
Year 10’s Digit Setting
00
10
20
90
80
70
Year 1’s Digit Setting
9
8
7
Month Setting
11
10
9
8
7
Month Day
Dual Time dial,
a.m./p.m. hand
30
40
50
60
0
1
2
3
4
5
6
12
1
2
3
4
5
6
Specifications
Accuracy at Normal
Temperature:
Timekeeping: Hour, minute (hands move at 10-second intervals), second; date,
Signal Receive
Function:
Stopwatch: Measuring unit: 1 second
Alarm: Setting units: Hour, minute
Countdown Timer: Countdown unit: 1 second
Mobile Link
Functions:
Other: Power Saving, Battery level indicator, High-brightness LED light,
Power Supply: Solar panel and 1 rechargeable battery
Battery Operating
Time:
Specifications are subject to change without notice.
±
15 seconds a month
day of the week
Calendar system: Full-auto calendar from 2000 to 2099
Others: Dual time (hour, minute, 24-hour timekeeping, 27 time zones,
auto summer time setting, Home Time/Dual Time swapping)
Auto receive, manual receive
Auto transmitter selection (for JJY, MSF/DCF77)
Receivable call signs: JJY (40kHz/60kHz), BPC (68.5kHz), WWVB
Measuring capacity: 23:59'59" (24 hours)
Measurement functions: Elapsed time, Flyback timing
Beeper: 10 seconds
Countdown range: 24 hours
Setting unit: 1 minute
Time up: 10-second beeper
Auto Time Correction
Time setting adjusted automatically at preset time.
One-touch Time Correction
Manual connection and time adjustment
Phone finder
Watch operation sounds the alert sound of the mobile phone.
World Time
Current time for approximately 300 cities selected for the watch
Home Time/World Time swapping
Auto summer time switching
Automatic switching between standard time and summer time
Timer Setting
Alarm Setting
Hand position correction
Data Communication Specifications
Bluetooth
Frequency Band: 2400MHz-2480MHz
Maximum Transmission: 0 dBm (1 mW)
Communication range: 2 meters max. (depends on environment)
Auto Correction of Hand Home Positions
Approximately 5 months
Conditions
Not exposed to light under the conditions below.
x Auto time adjustment: 4 times/day
x Light: 1 operation/day
x Alarm: Once (10 seconds)/day
x Power Saving: 6 hours/day
(60kHz), MSF (60kHz), DCF77 (77.5kHz)
®
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