CASIO PRW-1200 User Manual

Module 3043

Read This Important Information First

Battery

The battery installed in your watch is a factory-supplied battery that is intended for initial testing. If the battery runs out, it must be replaced by your nearest CASIO dealer or distributor.

Water Resistance

Your watch is classified according to its water resistance. The table below shows the water resistance rating of your watch. Use it correctly for proper operation.

Category	Marking on Case	Resists Splashes, Rain, etc.	Resists Washing, Sweat, etc.	Resists Swimming, Snorkeling	Resists Scuba Diving
I	None	No	No	No	No
II	WATER RESISTANT	Yes	No	No	No
III	50M WATER RESISTANT	Yes	Yes	No	No
IV	100M WATER RESISTANT	Yes	Yes	Yes	No
V	200M WATER RESISTANT	Yes	Yes	Yes	Yes
300M WATER RESISTANT	Yes	Yes	Yes	Yes

Notes for Corresponding Categories:

The watch is not water resistant. Avoid any contact with moisture.
Do not pull out the crown while the watch is wet.
Do not press the watch buttons underwater.
If water enters the watch, have it checked immediately by your nearest CASIO dealer or distributor.
Do not expose the watch to extreme temperatures.
Although the watch is designed for normal use, avoid rough handling and do not drop it.
Do not fasten the watchband too tightly. There should be enough space to fit one finger between the band and your wrist.
To clean the watch and band, use a soft, dry cloth, or a soft cloth dampened with a solution of mild neutral detergent and water. Never use volatile agents such as gasoline, paint thinner, benzine, or cleaning agents that spray.
When not using the watch, store it in a dry place.
Avoid contact with gasoline, cleaning solvents, aerosol sprays, adhesives, paint, etc. Chemical reactions caused by these materials can damage gaskets, the case, and the watch's finish.
Some models feature silk-screened graphics on the band. Be careful when cleaning these bands to avoid damaging the graphics.

For Resin Bands...

You may notice a white powdery substance on the band. This substance is harmless to your skin or clothing and can be easily removed by wiping with a cloth.
Exposure of resin bands to sweat or moisture, or storing them in high humidity conditions, can lead to damage, tearing, or cracking. To ensure a long service life for resin bands, wipe them clean of dirt and moisture with a soft cloth whenever possible.

For Fluorescent Cases and Bands...

Prolonged exposure to direct sunlight can cause gradual fading of the fluorescent color.
Extended contact with moisture can also cause gradual fading of the fluorescent color. If any moisture gets on the watch's surface, wipe it off as soon as possible.
Prolonged contact with any other wet surface can cause the fluorescent color to fade. Ensure the fluorescent surface is dry and avoid contact with other surfaces.
Strong friction between the fluorescent surface and another surface can cause the fluorescent color to transfer.

CASIO COMPUTER CO., LTD. is not responsible for any damage or loss incurred by the user or any third party arising from the use of this watch or its malfunction.

GENERAL DESCRIPTION OF OPERATING MODES

The illustration shows the Timekeeping Mode.

Press button “D” to cycle through the modes in the following sequence:

Timekeeping Mode → Altimeter Memory Mode → World Time Mode → Stopwatch Mode → Countdown Timer Mode → Alarm Mode → Signal Reception Mode → Timekeeping Mode.

Pressing button “A” switches the watch to Compass Mode.
Pressing button “B” switches the watch to Barometer/Thermometer Mode.
Pressing button “C” switches the watch to Altimeter Mode.
Pressing button “L” turns on the display backlight.

Setting Your Home City

Before using the watch, set your Home City code.

In Timekeeping Mode, press and hold button “E” until the Home City code flashes on the display, indicating the start of the setting procedure.
Use buttons “C” and “D” to change the Home City code.
Press button “E” to exit the setting procedure.

World Time City Codes

City Code	City	Difference from Greenwich Mean Time (GMT)	Other Major Cities in the Same Time Zone
ANC	Anchorage	-11.0	Pago Pago
HON	Honolulu	-10.00	Papeete
YVR	Vancouver	-09.00	Nome
LAX	Los Angeles	-08.00	Las Vegas, Seattle, Dawson City, San Francisco
DEN	Denver	-07.00	El Paso
CHI	Chicago	-06.00	Houston, Dallas, New Orleans
NYC	New York	-05.00	Montreal, Detroit, Boston, Panama City, Havana, Lima, Bogota
CCS	Caracas	-04.00	Santiago
RIO	Rio de Janeiro	-03.00	Sao Paulo, Buenos Aires, Brasilia, Montevideo
-01 GMT	Lisbon	-01.00	Praia
LON	London	+00.0	Dublin, Casablanca, Dakar, Abidjan
PAR	Paris	+01.00	Amsterdam, Algiers, Rome, Madrid, Vienna, Frankfurt, Hamburg
BER	Berlin	+01.00	Athens
ATH	Athens	+02.00	Cairo
CAI	Cairo	+02.00	Jerusalem
JRS	Jerusalem	+02.00	Jeddah
JED	Jeddah	+03.00	Kuwait, Riyadh, Aden, Addis Ababa, Nairobi, Shiraz, Moscow
THR	Tehran	+03.05	Dubai
DXB	Dubai	+04.00	Abu Dhabi, Muscat
KBL	Kabul	+04.05
KHI	Karachi	+05.00	Mumbai, Kolkata
DEL	Delhi	+05.50	Dacca
DAC	Dacca	+06.00	Colombo
RGN	Yangon	+06.50	Hanoi, Vientiane
BKK	Bangkok	+07.00	Kuala Lumpur, Manila, Perth, Ulaanbaatar
HKG	Hong Kong	+08.00	Seoul
SEL	Seoul	+09.00	Pyongyang
TYO	Tokyo	+09.00	Adelaide
ADL	Adelaide	+09.05	Darwin
GUM	Guam	+10.00	Melbourne, Rabaut
SYD	Sydney	+10.00	Noumea
NOU	Noumea	+11.00	Vila
WLG	Wellington	+12.00	Nadi, Nauru, Christchurch

Calibration Signal

This watch receives a calibration signal to automatically adjust the time. You can also manually receive the signal if the calibration signal is unavailable.

Signal Reception

To receive the signal:

Position your watch horizontally.
In Timekeeping Mode, press and hold button “C” for two seconds until “RC” appears on the display to indicate the start of signal reception.
Signal reception takes from 2 to 7 minutes. Be careful not to move the watch during reception.
When reception is complete, the display will show the last reception data and the “GET” indicator.
To stop the reception process and return to the Signal Reception Mode, press button “C”.
If signal reception is unsuccessful, “ERR” will appear on the display for 1-2 minutes, after which the watch will automatically return to the Timekeeping Mode.
You can return to Signal Reception Mode by pressing button “C”.

Auto-Calibration Signal

With auto-calibration turned on, the watch automatically receives the signal five or six times (during the night and early morning).
Auto-calibration only occurs when the watch is in Timekeeping Mode.
Signal reception takes from 2 to 7 minutes. Be careful not to move the watch during reception.

Signal Reception Indicator

This indicator shows the signal reception strength. Try to position the watch for optimal reception whenever possible. The watch requires about 10 seconds to establish the signal reception strength shown on the indicator. If the calibration indicator is not displayed, signal reception is not occurring. Perform manual calibration or check the watch's settings.

Turning Auto-Calibration ON and OFF

In Signal Reception Mode, press and hold button “E” until the setting flashes.
Press button “C” to turn auto-calibration ON or OFF.
Press button “E” to exit the setting procedure.

Viewing Last Signal Reception

When you enter Signal Reception Mode, the display shows the data from the last reception.

If “-:--” appears on the display, it means no reception was successful.
Press button “D” to return to Timekeeping Mode.

COMPASS MODE

The watch's built-in magnetic sensor detects magnetic north to determine direction. It can identify one of 16 cardinal directions.

Direction determination begins immediately upon entering Compass Mode (press button “A”).
After a few seconds, the display will show the direction indicated by the 12 o'clock position and the “ACT” indicator, signifying that the compass is measuring.
Press button “D” to return to Timekeeping Mode.

Performing Measurements

Place the watch on a level surface. The 12 o'clock position indicates the direction you want to determine.
Press button “A” to start measurement.
After a few seconds, the display will show the direction indicated by the 12 o'clock position.
- The watch measures continuously for 20 seconds.
- During measurement, the display shows the cardinal direction indicator, the angle between your current location and magnetic north, and graphical representations of cardinal directions (North, South, East, West).

Directional Labels:

N: North
E: East
S: South
W: West
NNE: North-Northeast
ENE: East-Northeast
ESE: East-Southeast
SSE: South-Southeast
SSW: South-Southwest
WSW: West-Southwest
WNW: West-Northwest
NNW: North-Northwest
NE: Northeast
SE: Southeast
SW: Southwest
NW: Northwest

Magnetic Sensor Calibration

If you suspect compass readings are inaccurate, perform calibration. You can use either bi-directional or north calibration. Bi-directional calibration is recommended if the watch has been exposed to magnetic interference. North calibration allows you to orient the watch to magnetic north. If you choose to perform both calibrations, do bi-directional calibration first, followed by north calibration.

Bi-directional Calibration

In Compass Mode, press button “E” to start calibration. The display will show “- 1 -”, and the magnetic north indicator will flash at the 12 o'clock position, indicating readiness for the first calibration direction.
Place the watch on a level surface and press button “A” to calibrate the first direction.
Upon completion, “OK” will appear, followed by “- 2 -”. The magnetic north indicator will flash at the 6 o'clock position, indicating readiness for the next calibration direction.
Rotate the watch 180 degrees.
Press button “A” to calibrate the second direction.
Upon completion, “OK” will appear, and the watch will automatically return to Compass Mode.
- You can only use two directions that are 180 degrees apart for bi-directional calibration.
- Do not move the watch during calibration, or “ERROR” may appear on the display. If this happens, you must start the calibration process from the beginning.
- The “ERROR” indicator may also appear if there is a strong source of magnetic interference nearby.
- It is best to perform compass calibration in the location where you intend to use it.

North Calibration

In Compass Mode, press button “E” to start bi-directional calibration. The display will show “- 1 -”, indicating the start of settings.
Press button “D” to start north calibration. The display will show “- N -”.
Place the compass on a level surface so that the 12 o'clock position aligns with North.
Press button “A” to start calibration.
Upon completion, “OK” will appear, and the watch will automatically return to Compass Mode after a short beep.
Do not move the watch during calibration, or “ERR” may appear on the display. If this happens, you must start the calibration process from the beginning.
The “ERROR” indicator may also appear if there is a strong source of magnetic interference nearby.

BAROMETER/THERMOMETER MODE

This watch is equipped with a sensor for measuring atmospheric pressure and temperature. Ambient temperature readings can be affected by body heat, direct sunlight, or moisture.

Monitoring Atmospheric Pressure/Temperature

Press button “B” to enter Barometer/Thermometer Mode and begin measuring atmospheric pressure and temperature, which takes about 4-5 seconds.
Atmospheric pressure readings are displayed in the center of the screen.
Press button “E” to switch between temperature readings and the pressure graph in the lower part of the screen.
Atmospheric pressure is displayed in 1 hPa (0.05 inHg). The measurement range is 260 – 1100 hPa (7.65 – 32.45 inHg).
If the measured atmospheric pressure is outside the sensor's range, “----” will appear on the display. Readings will resume when the pressure returns to normal.
Temperature readings are displayed in 0.1°C (0.2°F).
If “----°C” (°F) appears, it means the temperature is outside the allowable range of -10°C to 60°C (-14°F to 140°F). Readings will resume when the temperature returns to normal.

Atmospheric Pressure Graph

Measurements begin upon entering Barometer Mode and are taken every 2 hours, starting from the even hour. All measured values are displayed on the watch's graph.

The graph displays readings for the past 30 hours.
The flashing graph cursor indicates the latest measurement.
The graph rises or falls when the pressure changes by 1 hPa (0.05 inHg).
Sudden temperature changes may cause some graph segments to disappear. The display will resume when the temperature returns to normal. The following conditions may disrupt the graph display: Measurements outside the range (260 hPa – 1100 hPa / 7.65 – 32.45 inHg). Sensor malfunction.

Pressure Difference Display

When atmospheric pressure measurement begins in Barometer Mode, the first reading is taken as the base. Each subsequent reading is compared to the first, and the difference is displayed. Readings are displayed in a range of +/-15 hPa.

In Barometer/Thermometer Mode, press and hold button “E” until “SET” appears on the upper part of the display.
Release button “E” and wait about 4-5 seconds for “OFF” or the selected temperature unit to appear.
Press button “D” twice to enter the setting mode.
Press button “C” to turn the pressure difference display ON or OFF.
Press button “E” to save the settings and return to Barometer/Thermometer Mode.

Thermometer Calibration

The sensor is factory calibrated and does not require initial calibration. If readings are significantly inaccurate, recalibration may be necessary.

In Barometer/Thermometer Mode, press and hold button “E” until “SET” appears on the upper part of the display.
Release button “E” and wait about 4-5 seconds for “OFF” or the selected temperature unit to appear.
Wait another 4-5 seconds for “OFF” or the selected atmospheric pressure unit to appear.
After a few seconds, press button “C” to increase or button “A” to decrease the value by 0.1°C (0.2°F).
Pressing buttons “C” and “A” simultaneously resets all settings to their defaults (“OFF”).
Press button “E” to save the settings and return to Barometer/Thermometer Mode.

Barometer Calibration

The sensor is factory calibrated and does not require initial calibration. If readings are significantly inaccurate, recalibration may be necessary.

In Barometer/Thermometer Mode, press and hold button “E” until “SET” appears on the upper part of the display.
Release button “E” and wait about 4-5 seconds for “OFF” or the selected temperature unit to appear.
Wait another 4-5 seconds for “OFF” or the selected atmospheric pressure unit to appear.
After a few seconds, press button “D” to proceed to barometer sensor calibration.
Press button “C” to increase or button “A” to decrease the value by 0.1 hPa (0.05 inHg).

ALTIMETER MODE

The watch's built-in altimeter uses the pressure sensor to calculate altitude according to International Standard Atmosphere (ISA).

Altitude calculations based on atmospheric pressure readings are not precise. Do not use the altimeter for critical altitude measurements.
Sudden temperature changes can affect pressure readings.
Altimeter measurements are taken in 5m (20 ft) increments.
The measurement range is -700 to 10,000m (-2,300 to 32,800 ft).
If the measured altitude exceeds the allowable range, “- - - -” will appear on the display.

Monitoring Altimeter Readings

Press button “C” to enter Altimeter Mode.
The watch automatically begins calculating your current altitude, which takes about 4-5 seconds.
The “ACT” indicator is displayed while the altimeter is operating.
Leave the watch in Altimeter Mode for a while if you want to view changes in your altitude and the altitude graph. The “ACT” indicator is displayed for the first three minutes after starting the altimeter, during which measurements are taken every 5 seconds. After 3 minutes, measurements are taken every 2 minutes.
To restart altitude measurements (regardless of your current altitude), press button “C”.
To stop measurements and exit Altimeter Mode, press button “D”.

Data Logging

You can save up to 40 records in the watch's memory using the following modes: Auto-save, Saving Current Data, Saving Maximum/Minimum Data.

Auto-Save

In this mode, altitude values are saved to the watch's memory at specified intervals.

Press and hold button “C” to enable saving. This simultaneously saves the current data (month, day, time, and altitude).
All previous data is automatically deleted when saving is enabled.
The watch then automatically saves recorded values every 15 minutes.
Auto-save stops after 40 records are logged.
You can interrupt auto-save by pressing button “C”.

Saving Current Data

In this mode, you can view the following recorded data: maximum altitude (“MAX”), minimum altitude (“MIN”), total ascent (“ASC”), total descent (“DSC”), and average altitude difference (“REL”).

Saving Maximum/Minimum Values

This mode saves the highest altitude recorded, the lowest altitude recorded, total ascent, and total descent.

Viewing Auto-Save and Current Data

Press buttons “C” and “A” to view saved data.
Press button “D” to exit.
If no data is saved in these modes, “- - - -” will appear on the display.

Viewing Maximum/Minimum Values

In Altimeter Mode, press button “B”.
Press buttons “C” and “A” to view saved data.
Press button “B” to switch to viewing auto-save and current data.
Press button “D” to exit.

Deleting Maximum/Minimum Values

In Altimeter Mode, press button “B”.
Press and hold button “E” until “CLR” appears on the display.
Release button “E” after the indicator starts flashing.

Setting a Reference Altitude

The watch's altimeter measures relative altitude based on a reference altitude you set.

In Altimeter Mode, press and hold button “E”. The display will show “OFF” or the entered altitude.
Press button “C” to increase or button “A” to decrease the altitude value in 5m (20 ft) increments.
You can set the altitude from -10,000 to 10,000 meters (-32,800 to 32,800 ft).

Setting the Sound Alarm

You can set a sound alarm for a specific altitude. When this altitude is reached, the alarm will sound for about 5 seconds. Press any button to stop it.

In Altimeter Mode, press and hold button “E” until “SET” appears on the upper part of the display.
Release button “E” and wait about 4-5 seconds for “OFF” or the selected altitude unit to appear.
Press button “D” twice to enter the setting mode.
Press buttons “C” and “A” to set the altitude value in 5m (20 ft) increments.
- You can set the altitude from -10,000 to 10,000 meters (-32,800 to 32,800 ft).
- Pressing buttons “C” and “A” simultaneously resets the altitude value to zero.
Press button “E” to save the settings.

Turning the Sound Alarm ON and OFF

In Altimeter Mode, press and hold button “E” until “SET” appears on the upper part of the display.
Release button “E” and wait about 4-5 seconds for “OFF” or the selected altitude unit to appear.
Press button “D” twice to enter the setting mode.
Press button “C” to turn the sound alarm ON or OFF.
Press button “E” to save the settings.

WORLD TIME MODE

In this mode, you can view the time in any of 30 cities worldwide (29 time zones).

Press buttons “C” and “A” to view the time in other cities.

For Daylight Saving Time:

Use buttons “C” and “A” to select the city for which you want to set Daylight Saving Time.
Press button “E” to turn Daylight Saving Time (“DST”)/Standard Time ON or OFF.

STOPWATCH MODE

The Stopwatch Mode allows you to measure elapsed time, split times, and two finishes. The total elapsed time measurement range is 9 hours, 59 minutes, 59.99 seconds.

a) Measuring Elapsed Time: C (Start) – C (Stop) – C (Restart) – C (Stop) – A (Reset)

b) Measuring Split Times: C (Start) – A (Split) – A (Continue) – C (Stop) – A (Reset)

c) Measuring Two Finishes: C (Start) – A (Split 1. Display shows 1st finish time) – C (2nd finish) – A (Cancel split. Display shows 2nd finish time) – A (Reset)

COUNTDOWN TIMER MODE

The countdown timer can be set from 1 to 60 minutes.

When the countdown reaches zero, a long beep sounds.
For the last 10 seconds of the countdown, a short beep sounds every second.
In auto-repeat mode, when the countdown reaches zero, a beep sounds and the countdown restarts automatically from the preset value. This can repeat up to 10 times.
You can also set sound alerts for the countdown process. Four short beeps will sound at the start of each 10, 5, 4, 3, 2, and 1 minute remaining, and at the start of the last minute (50, 40, 30, 20, 10, 5, 4, 3, 2, and 1 second remaining).

Setting the Timer

In Timer Mode, press and hold button “E” while the start time is displayed. The start time will flash.
Pressing button “A” at this point toggles the sound alert ON or OFF.
Press button “D” to cycle through the settings: Start Time → Auto-Repeat Mode.
Use buttons “C” and “A” to enter the start time. You can set the start time from 1 to 60 minutes in 1-minute increments.
Press button “C” to turn auto-repeat ON or OFF.
Press button “E” to save the settings.

Using the Timer

Press button “C” in Timer Mode to start the countdown.
Press button “C” again to stop the countdown.
You can resume the countdown by pressing button “C”.
After stopping the countdown, press button “A” to reset the countdown time to the starting value.

ALARM MODE

You can set various daily alarms. The alarm sounds for 10 seconds at the set time.

If the hourly chime is enabled, a short beep sounds at the start of each hour.

Setting an Alarm

In Alarm Mode, press buttons “C” and “A” to select the alarm type in the following sequence: -1 → -2 → -3 → -4 → SIG (hourly chime).
After selecting the alarm type, press and hold button “E”. The hour digits will flash, indicating they are selected for setting. The alarm is automatically turned ON at this point.
Press button “D” to cycle through the settings: Hour – Minute – Hour.
Press button “C” to increase or button “A” to decrease the selected value. Holding down a button allows you to advance the value more quickly.
The 12-hour or 24-hour format matches the format you selected for the current time. When using the 12-hour format, be careful to set the time correctly for AM or PM.
Press button “E” to return to Alarm Mode.

Checking the Alarm

In Alarm Mode, press button “C” to check the alarm sound.

Turning the Alarm Sound/Hourly Chime ON and OFF

In Alarm Mode, press buttons “C” and “A” to select the alarm type or hourly chime.
Press button “B” to turn the selected alarm type or hourly chime ON or OFF.

Backlight

In any mode, press button “L” to turn on the backlight.
The backlight of this watch uses electro-luminescent (EL) panels, whose brightness decreases after long periods of use.
The watch emits an audible sound during illumination. This is caused by the vibration of the EL panel and does not indicate a malfunction.
The backlight is difficult to see in direct sunlight.
Frequent use of the backlight will shorten battery life.

Changing Backlight Duration

In Timekeeping Mode, press and hold button “E” until the Home City code flashes on the display, indicating the start of the setting procedure.
Press button “D” three times to access the backlight duration setting.
Press button “A” to select the backlight duration: 2.5 seconds or 1.5 seconds.
Press button “E” to save the settings.

Auto-Backlight

You can turn the auto-backlight function ON (indicator “A.EL”) or OFF by pressing and holding button “L” for two seconds in Timekeeping Mode. Auto-backlight activates automatically whenever your hand is tilted at an angle of approximately 40° from the horizontal.

POWER SOURCE

This watch is equipped with a solar rechargeable battery and a backup battery that is powered by the solar rechargeable battery. If your watch is kept in the dark for extended periods, the backup battery will discharge.

Battery Power Indicator

The display shows the battery power level.

Level	Indicator	Description
1	H	Battery power is sufficient for normal operation.
2	M	Battery power is sufficient for normal operation.
3	L	The alarm, backlight, and electronic display do not work. The display shows the “C” indicator.
4	CHG	The battery is completely discharged.
5		The battery is completely discharged, and all settings are automatically deleted.

If there is no indicator on the display, the battery is completely discharged. Place your watch in a well-lit area. Be careful not to place your watch in direct sunlight for extended periods, as this may cause malfunctions. If the battery indicator shows “RECOV”, it means the battery is recharging due to frequent use of the backlight or alarms.

Battery Charging

After a full charge, the watch will operate for approximately 5 months under the following conditions: The watch is not exposed to direct sunlight. 6 minutes of calibration per day. 1.5 seconds of backlight use per day. 10 seconds of alarm use per day. 10 seconds of compass use per day. 10 hours of altimeter use per week. 30 seconds of barometer/thermometer use per day. 18 hours of operation, 6 hours (per day) in sleep mode.

Exposing the watch to sunlight every day ensures continuous battery charging:

Light Intensity	Approximate Exposure Time
Direct Sunlight (50,000 lux)	5 minutes
Sunlight through Window (10,000 lux)	24 minutes
Daylight in Cloudy Weather (5,000 lux)	48 minutes
Daylight Lamp (500 lux)	8 hours

The following table shows the approximate time required to charge the battery:

Light Intensity	Level 5, 4	Level 3	Level 2	Level 1
Direct Sunlight	2 hours	13 hours	6 hours	4 hours
Sunlight through Window	63 hours	29 hours
Daylight in Cloudy Weather	128 hours	58 hours
Daylight Lamp	80 hours

POWER SAVING MODE

Sleep Mode conserves battery power when the watch is left in the dark. The following table shows the availability of watch functions when in Sleep Mode:

Duration in Sleep Mode	Functions
60 – 70 minutes	Display is off. All functions are available. The display shows the “PS” indicator.
6 – 7 days	Display is off. Functions are unavailable. The display shows the “PS” indicator.

Turning Power Saving Mode ON and OFF

In Timekeeping Mode, press and hold button “E” until the Home City code flashes on the display, indicating the start of the setting procedure.
Press button “D” nine times to access the Power Saving Mode settings.
Press button “C” to turn Power Saving Mode ON or OFF.
Press button “E” to save the settings.

Your watch may also enter Sleep Mode automatically. To return the watch to normal operation, place it in a well-lit area or press any button.

TIMEKEEPING MODE

Setting the Time and Date

Press button “E” in Timekeeping Mode. The Home City code will flash, indicating the start of the setting procedure.
Press button “D” to cycle through the settings: Home City Code → DST (Daylight Saving Time) → 12/24 Hour Format → Seconds → Hour → Minute → Year → Month → Day → Power Saving Mode → Temperature Unit → Altitude Unit → Pressure Unit → Home City.
If you select seconds for correction (seconds display flashes), press button “C” to reset the seconds to 00. If you press button “C” when the seconds are between 30 and 59, the seconds will reset to 00 and the minutes will advance by 1. If the seconds are between 00 and 29, the minutes will not change.
Use button “C” to increase or button “A” to decrease the values for minutes, etc. Holding down a button allows you to advance the value more quickly.
The day of the week is set automatically based on the date.
You can set the year from 2000 to 2099.
Press button “C” to turn Daylight Saving Time (“DST”)/Standard Time ON, OFF, or select Auto DST (“AT”). Auto DST switching is only possible if your Home City is set to London, Paris, Berlin, Athens, New York, Chicago, Denver, Tokyo, Seoul, Hong Kong, or Los Angeles.
Press button “C” to switch between 12-hour and 24-hour formats. In the 12-hour format, “P” indicates PM.
Press buttons “C” and “A” to select the Home City code.
Press button “C” to turn Power Saving Mode ON or OFF.
Press button “E” to return to Timekeeping Mode.

If you do not press any button for a while, the watch will automatically return to Timekeeping Mode. You can turn the button operation beep ON or OFF by pressing button “D”.

MALFUNCTION INDICATORS

Certain circumstances or environmental conditions may cause sensor malfunctions, indicated by “ERR” on the display. If normal conditions resume or you re-enter the relevant mode, “ERR” should disappear. If it persists, the sensors may be damaged. Contact a service center.

TECHNICAL SPECIFICATIONS

Feature	Specification
Accuracy	+-15 seconds per month
Timekeeping Mode	Hour, minute, second, AM/PM (P), Year, Month, Day. Automatic calendar from 2000 to 2099. 12/24 hour format, Daylight Saving Time (DST).
Calibration Signal	Receives calibration signal (5 times during the night), manual calibration, calibration signal indicator, time display.
Stopwatch Mode	Maximum measurement range: 9 hours, 59 minutes, 59.99 seconds. Measurement modes: elapsed time, split times, two finishes.
World Time Mode	Displays time in 30 cities worldwide (29 time zones).
Alarm Mode	Various daily alarms. Alarm sounds for 10 seconds at the set time. Hourly chime.
Countdown Timer Mode	Countdown range: 1 to 60 minutes. Sound alert upon countdown completion. Auto-repeat function.
Compass Mode	Determines cardinal directions, magnetic north position. Bi-directional and north calibration.
Barometer/Thermometer Mode	Barometer measurement range: 260 to 1100 hPa (7.65 to 31.00 inHg). Unit: 1 hPa (0.05 inHg). Thermometer measurement range: -10°C to 60°C (-14°F to 140°F). Unit: 0.1°C (0.2°F).
Altimeter Mode	Measures altitude based on pressure sensor. Altitude difference measurement, maximum/minimum altitude, total ascent/descent, average altitude difference. Altitude graph. Stores up to 40 records.
Other	Backlight (LED), Auto-backlight, backlight duration setting, power saving mode, malfunction indicators.

Product Information

Name: Wrist electronic / electro-mechanical quartz watches (Men's/Women's)
Brand: CASIO
Manufacturer: CASIO COMPUTER Co.,Ltd. (CASIO Computer Co., Ltd.)
Manufacturer's Address: 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan
Importer: OOO "Casio", 127055, Moscow, Sushchevskaya St., Bldg. 27, Str. 1, Russia
Country of Origin: Japan
Warranty Period: 1 year
Address for Authorized Claims: As indicated on the warranty card.
Compliance: Product complies with GOST 26270-98 (sec. 4.35). Certificate of Conformity No. RUSS JP. АЯ 46.Д00003.

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	Casio Operation Guide 3410: Comprehensive Features and Usage Detailed operation guide for the Casio 3410 watch, covering its advanced features such as altimeter, barometer, thermometer, digital compass, radio-controlled atomic timekeeping, stopwatch, countdown timer, alarms, and illumination. Includes setup, usage instructions, troubleshooting, and specifications.
	Casio PRW-5000/5100 Watch User Manual - Features and Operation Comprehensive user manual for Casio PRW-5000/5100 series watches (models 5114, 5214), detailing timekeeping, world time, stopwatch, alarms, barometer, altimeter, thermometer, and compass functions.
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	CASIO 3499 User's Guide: Comprehensive Operation Manual Detailed instructions for the CASIO 3499 watch, covering charging, mode navigation, time settings, compass, barometer, altimeter, stopwatch, and specifications. Learn how to use all features.
	Casio G-SHOCK GDF-100 Watch User Manual Comprehensive user manual for the Casio G-SHOCK GDF-100 watch, covering features, operation, maintenance, and international warranty information.
	Operation Guide 3499 - Casio Watch This operation guide provides detailed instructions for the Casio 3499 watch, covering its various functions including timekeeping, digital compass, barometer, thermometer, altimeter, stopwatch, countdown timer, alarms, and world time. It also includes sections on charging, maintenance, troubleshooting, and specifications.
	Casio LAW-21 Модуль 2789: Руководство пользователя и характеристики Полное руководство пользователя для часов Casio LAW-21 (Модуль 2789). Содержит инструкции по эксплуатации, уходу, описания режимов работы (текущее время, мировое время, таймер, секундомер, будильник) и технические характеристики.