Casio DW-9800 Module 1869 User Manual

Introduction

Congratulations on your purchase of a CASIO watch! This manual provides comprehensive information on operating your watch. Please read it carefully and keep it handy for future reference to fully utilize all the watch's functions.

Notation and Information Presentation:

• Buttons are labeled with letters (A, B, C, D) as shown in diagrams.
• Each section covers a specific mode. Refer to Section 9 for detailed technical information and Section 11 for care instructions.

Disclaimer: This watch's capabilities do not allow for measurements requiring professional or industrial precision. The values obtained are approximate. In critical situations like mountain climbing or activities where getting lost could be life-threatening, always carry a second compass to verify readings. CASIO COMPUTER CO., LTD. is not responsible for any losses resulting from the use of this watch.

General Description

Press the "MODE" button (labeled 'C' in some diagrams, or implied by context) to switch between modes. The main modes are:

• Timekeeping Mode (Режим текущего времени)
• World Time Mode (Режим всемирного времени)
• Orientation Mode (Режим ориентирования)
• Timer Mode (Режим таймера)
• Stopwatch Mode (Режим секундомера)
• Alarm Mode (Режим будильника)

Backlight (Подсветка)

The watch uses an electro-luminescent panel for full-screen illumination, allowing readings in darkness. The backlight activates automatically when you tilt the watch towards your face at a certain angle.

• To use the auto-backlight, it must first be enabled. An indicator will appear on the screen when the function is active.
• Manual Backlight: In any mode (except World Time), pressing button 'B' illuminates the screen for approximately two seconds. This works regardless of whether auto-backlight is enabled.

Auto-Backlight Operation:

• When the auto-backlight function is enabled, it activates automatically when you perform the following action: Tilt your watch so it is parallel to the ground, then turn it towards you at approximately a 40° angle. The screen backlight will turn on.

Diagram shows a watch tilted towards the face at a 40° angle for auto-backlight activation.

Warning!

• Do not read the watch in darkness while climbing or in other hazardous locations; it is dangerous and may lead to injury.
• Do not read the watch while walking along a road or in traffic; it is dangerous and may lead to serious injury.
• Do not read the watch while riding a bicycle, motorcycle, or driving a car; it is dangerous and may lead to injury or accidents.
• Before riding a bicycle, motorcycle, or car, ensure the auto-backlight function is turned OFF. Sudden activation of the auto-backlight could distract you, leading to a traffic accident and serious injury.

Timekeeping Mode (Режим текущего времени)

In this mode, you can set the current time and date, determine direction, and measure temperature. You can also calibrate the temperature sensor.

Seconds Correction

To synchronize seconds with an accurate time signal (radio, TV, etc.):

1. In Timekeeping Mode, press and hold button 'A' until the seconds digits flash.
2. Press button 'C' to set the seconds to "00". If the seconds are between 30-59 when you press 'C', the minute count will increment. If seconds are 00-29, minutes remain unchanged.
3. Press button 'A' to return to the timekeeping display.

Diagram shows the Timekeeping Mode display with Hour:Minute, Day of Week, Seconds, Month-Day, and AM/PM indicator.

Setting Current Time

To set the current time and date:

1. In Timekeeping Mode, press and hold button 'A' until the seconds digits flash.
2. Press button 'D' to cycle through the digits to be set: Seconds, Date, Hour, Minute, 12/24 Hour Format, Month, Year.
3. When the desired digits are flashing, press button 'C' to increase the value or button 'B' to decrease it. For 12/24 hour format, press 'C' to select the desired format.
4. After setting the time and date, press button 'A' to return to the timekeeping display.

Diagram shows the sequence for setting time: Seconds -> Date -> Hour -> Minute -> 12/24hr -> Month -> Year.

Notes:

• The year can be set from 1995 to 2039.
• The day of the week is set automatically based on the date.
• The built-in calendar automatically accounts for leap years and month lengths. It only needs manual adjustment after battery replacement.

Azimuth and Temperature Measurement

To measure azimuth and temperature:

1. In Timekeeping Mode, place the watch on a flat surface. If worn on the wrist, hold your hand horizontally.
2. Press button 'C' to start the measurement. After about 1 second, the current temperature, direction indicators, and azimuth reading (in degrees) will appear.

Diagram shows a Timekeeping Mode display with temperature, direction indicators (N, S, E, W), and azimuth value (e.g., 245°).

3. You can repeat steps 1 and 2 as needed.
4. You can rotate the bezel or scale to align the 'N' (North) indicator with the magnetic north indicator on the display. This aligns all other directional markings.
5. Press button 'D' to return to the timekeeping display. The watch will automatically return to the timekeeping display if no button is pressed for about 60 minutes.

Note:

• If you only want to check the temperature, press 'C' in Timekeeping Mode. Azimuth readings will also appear, but may be inaccurate if the watch is not held correctly.
• The azimuth value in degrees indicates the direction the 12 o'clock mark is pointing.
• After measuring azimuth and temperature in Timekeeping Mode, the watch will measure and display the temperature every 2 minutes.

Temperature Sensor Calibration

The built-in temperature sensor is factory calibrated and usually does not require adjustment. However, if you notice significant errors, you can calibrate it yourself.

Caution: Incorrect calibration can lead to inaccurate results. Read these instructions carefully before proceeding.

• Compare your watch's reading with a reliable thermometer. If calibration is needed, remove the watch from your wrist and wait 20-30 minutes for its temperature to stabilize.

How to Calibrate the Temperature Sensor

1. In Timekeeping Mode, press button 'C' to display azimuth and temperature.
2. Press and hold button 'A' until the temperature digits flash.
3. Press button 'C' to increase the temperature reading by 0.1°C, or button 'B' to decrease it by 0.1°C. You can adjust the temperature by ±9.9°C. The total temperature range is -10.0°C to +60.0°C.

Diagram shows a display with temperature digits flashing, indicating calibration mode.

4. To restore factory calibration, press buttons 'B' and 'C' simultaneously.
5. After calibration, press button 'A' to return to the measurement display. Press 'D' to return to the timekeeping display.

Orientation Mode (Режим ориентирования)

This mode allows you to store up to 5 sets of data, each including direction, temperature, and the time of measurement.

Diagram shows a sequence of memory cells (1 through 5) and an initial screen.

Taking Readings in Orientation Mode

1. In Orientation Mode, press button 'A' to select the memory cell where you want to store data. Pressing 'A' cycles through the memory cells.

Diagram shows the sequence of memory cells being selected.

2. Place the watch on a flat surface. If worn on the wrist, hold your hand horizontally.
3. Press button 'C' to start the azimuth and temperature measurement. After about 1 second, the current temperature, direction indicators, and azimuth reading will appear.

Diagram shows a display with current time, temperature, and azimuth reading (e.g., 254°).

4. You can rotate the scale to align the 'N' (North) indicator with the magnetic north indicator. This aligns all directional markings.

Diagram shows the compass scale being adjusted to align with magnetic north.

5. Press button 'D' to return to the timekeeping display. The watch will automatically return to the timekeeping display if no button is pressed for about 60 minutes.

Note: Measurements will not be saved if you perform certain actions while the initial screen is displayed.

Accessing Stored Measurement Results

In Orientation Mode, use button 'A' to cycle through the stored measurement results.

Diagram shows the sequence of accessing stored data: Initial screen -> Memory 1 -> Memory 2 -> Memory 3 -> Memory 4 -> Memory 5.

Deleting All Data Stored in Orientation Mode

In Orientation Mode, press and hold buttons 'A' and 'C' simultaneously for about two seconds until "--" appears in the direction reading. This indicates all data has been erased.

• Individual memory cells cannot be deleted.

World Time Mode (Режим всемирного времени)

This mode allows you to view the current time and average temperature in any of the 27 cities (29 time zones) programmed into the watch.

• Refer to the "City Code Table" for detailed information on city codes.
• Timekeeping in Timekeeping Mode and World Time Mode is independent. You must set the time for each mode separately.
• Changing the time setting for one city in World Time Mode automatically updates the corresponding time settings for other cities.

Diagram shows the World Time Mode display with current time, city code (e.g., LON), and GMT difference.

Displaying Current Time and Temperature in Another City

1. In World Time Mode, press button 'C' to cycle forward through city codes, or button 'B' to cycle backward.
2. When a city is selected, the current time and its difference from Greenwich Mean Time (GMT) are displayed. The watch then returns to displaying your local time (from Timekeeping Mode).
3. Press button 'A' to display the average temperature for the selected city for the current month. Press 'C' to advance through months, or 'B' to go backward.

Diagram shows the display showing average temperature for a selected city and month.

4. If the city code displays "GMT" or "--", the average temperature is not shown.
5. Press button 'A' to return to the timekeeping display for the selected city.

Setting World Time

1. In World Time Mode, use buttons 'B' or 'C' to cycle through city codes and find the time zone you want to set.
2. Press and hold button 'A' until the Daylight Saving Time (DST) indicator starts flashing.

Diagram shows the DST indicator flashing, indicating it is selected for adjustment.

3. Press button 'D' to cycle through the settings that can be adjusted: DST, Hour, Minute.
4. When the DST indicator is flashing, press 'C' to enable ("DST") or disable ("OFF") Daylight Saving Time.
5. When the Hour or Minute digits are flashing, press 'C' to increase the value or 'B' to decrease it.
6. After setting the time, press button 'A' to return to World Time Mode.

Daylight Saving Time: When DST is enabled, 1 hour is added to the current time. DST settings can be made for each time zone. Note that DST is not observed in all countries.

Switching Between DST and Standard Time:

1. In World Time Mode, use buttons 'B' or 'C' to display the city code for which you want to switch between DST and standard time.
2. Press and hold button 'A' until the DST indicator starts flashing.
3. Press button 'C' to enable ("DST") or disable ("OFF") Daylight Saving Time.
4. After making the setting, press button 'A' to return to the World Time Mode.
5. When DST is enabled for a selected city, the "DST" indicator will appear on the screen.

Alarm Mode (Режим будильника)

You can set three independent alarms with specified hour, minute, month, and day. An hourly chime provides a double beep at the start of each hour.

Alarm Types: The alarm type depends on the settings.

Setting a Daily Alarm: Set the hour and minute for the alarm.

Diagram shows Alarm Mode display with Alarm number, time, and month-day.

Setting Alarm Time

1. In Alarm Mode, press button 'C' to select the alarm number.
2. After selecting the alarm number and type, press and hold button 'A' until the alarm hour digits flash.
3. Press button 'D' to cycle through the digits to be set: Hour, Minute, Month, Day.

Diagram shows the sequence for setting alarm time: Hour -> Minute -> Month -> Day.

4. When the Hour, Minute, Month, or Day digits are flashing, press 'C' to increase the value or 'B' to decrease it.
5. To set an alarm without specifying a month (daily or monthly alarm), enter "-" for the month.
6. To set an alarm without specifying a day (daily alarm or monthly alarm), enter "--" for the day.

Diagram shows how to enter '-' for month and '--' for day.

7. When setting the time in 12-hour format, pay attention to the "AM" (A) and "PM" (P) indicators.
8. After setting the alarm time, press button 'A' to return to the Alarm Mode display.

Using the Alarm

The alarm signal sounds for approximately 20 seconds or until any button is pressed.

Checking Alarm Signal

To listen to the alarm signal, press and hold button 'C'.

Enabling and Disabling Alarms and Hourly Chime

1. In Alarm Mode, press button 'C' to select the alarm or hourly chime function.
2. Press button 'A' to enable or disable the selected function.

Diagram shows indicators for Alarm ON, Hourly Chime ON.

3. The indicators for Alarm ON and Hourly Chime ON remain on the screen in any mode if these functions are enabled.
4. If an alarm is enabled, its indicator will be displayed even when another mode is active.

Stopwatch Mode (Режим секундомера)

The stopwatch measures elapsed time, allows for split times, and records two finish times. The maximum measurable time is 23 hours, 59 minutes, 59.99 seconds.

Diagram shows the Stopwatch Mode display with 1/100 second, minutes, seconds, and current time.

a) Measuring Elapsed Time

• Start: Press 'C'.
• Stop: Press 'C'.
• Repeat Start/Stop: Press 'C' again.
• Reset: Press 'A'.

Diagram shows Start (C), Stop (C), Reset (A) operations for elapsed time measurement.

b) Split Time Measurement

• Start: Press 'C'.
• First Split: Press 'A'.
• Second Split: Press 'A' again.
• Stop: Press 'C'.
• Reset: Press 'A'.

Diagram shows Start (C), First Split (A), Second Split (A), Stop (C), Reset (A) operations for split time measurement.

c) Split Time Measurement and Recording 1st and 2nd Finish Times

• Start: Press 'C'.
• First Finisher: Press 'A' to record the first split time.
• Second Finisher: Press 'A' again to record the second split time.
• Stop: Press 'C'.
• Reset first split, display second finish time: Press 'A'.
• Reset all: Press 'A' again.

Diagram shows the sequence for recording two finish times.

Timer Mode (Режим таймера)

The countdown timer can be set from 1 minute to 24 hours. An audible signal sounds when the timer reaches zero.

• The auto-repeat function can be enabled. When the timer reaches zero, the previously set time will be restored, and the countdown will start again automatically.

Diagram shows the Timer Mode display with Hour, Minute, Second, and current time.

Setting the Timer Time

1. In Timer Mode, press and hold button 'A' until the hour digits flash.
2. Press button 'D' to cycle through the digits to be set: Hour, Minute, Second.
3. When the Hour, Minute, or Second digits are flashing, press button 'C' to increase the value.
4. To set the timer for 24 hours, set the time to "0:00'00".
5. After setting the time, press button 'A' to return to the Timer Mode display.

Using the Timer

• To start the timer, display the timer screen and press button 'C'.
• When the timer reaches zero, an audible signal sounds for 10 seconds (or 1 second if the set time is 10 seconds or less). Press any button to stop the signal. After the signal stops, the countdown ceases, and the timer resets to its initial setting.
• To pause the countdown while it is running, press button 'C'.
• To resume the countdown, press button 'C' again.
• To stop the timer and reset it to its initial setting, first pause it (by pressing 'C'), then press button 'A'.

Enabling and Disabling Auto-Repeat Function

1. In Timer Mode, press and hold button 'A' until the hour digits flash.
2. Press button 'B' to enable or disable the auto-repeat function.

Diagram shows the graphic area indicating whether the auto-repeat function is enabled (with bars) or disabled (blank).

3. Press button 'A' to return to the Timer Mode display.

Notes:

• The initial Timer Mode screen does not show indicators for the auto-repeat function. To check its status, follow step 1 to display the setting screen; the graphic area will indicate if it's enabled. Then press 'A' to return to the initial screen.
• When the timer reaches zero with auto-repeat enabled, an audible signal sounds, the timer resets to its original setting, and the countdown restarts. You can interrupt this by pressing 'C' and manually reset by pressing 'A'.
• Normally, the timer signal sounds for 10 seconds. If the set time is 10 seconds or less, the signal sounds for only one second.

Reference Information (СПРАВОЧНЫЕ СВЕДЕНИЯ)

This section provides more detailed information and additional technical data about the watch's functions, including important notes and precautions.

Warning Indicators

Warning indicators appear on the screen when certain errors occur, stopping any measurement operations. Indicators appear at the top of the screen, and "--" replaces direction or temperature readings.

• In some cases, "ERR" or "BAT" messages may disappear after changing modes. You can continue using the watch until the message reappears.
• If the sensor malfunctions, contact an authorized CASIO dealer or service center as soon as possible.

Diagram shows "ERR" and "BAT" indicators.

Magnetic Field Indicator

This indicator appears when the digital compass cannot provide accurate readings, usually due to a strong magnetic field affecting the watch. Move the watch to a different location and try the procedure again. Refer to "Digital Compass Function Features" for error causes.

Battery Indicator (BAT)

This message indicates that the battery is critically low, preventing measurements. It appears when battery power drops below a certain level or when using the watch at very low temperatures (below -10°C).

• If "BAT" appears during use at low temperatures, it will disappear when the watch returns to normal temperatures, and normal operation will resume.
• If the battery is critically low at normal temperatures (indicated by "BAT"), replace the battery as soon as possible. Note that replacing the battery will erase all memory contents.

Sensor Malfunction Indicator (ERR)

This message indicates a malfunction in the sensor's electrical circuit. The "ERR" indicator flashes on the screen. The "ERR" message may also appear during digital compass calibration. In such cases, it does not indicate a sensor failure and will disappear after recalibrating the digital compass.

Auto Return Function

• After performing operations in any mode, you can return to Timekeeping Mode by pressing button 'D'.
• If no button is pressed for two to three minutes while digits are flashing in any setting mode, the watch automatically saves the entered values and exits the setting mode.

Viewing Date and Other Settings

Buttons 'B' and 'C' are used in various modes to scroll through data. Holding these buttons down usually scrolls through the data rapidly.

12-Hour or 24-Hour Time Display Format

The 12-hour or 24-hour format set in Timekeeping Mode is also used in Orientation, World Time, and Alarm modes.

Backlight Usage Precautions

• Prolonged use of the electro-luminescent panel can reduce its brightness.
• The backlight may not be visible in bright sunlight.
• The watch emits a sound when the digital screen is illuminated. This is due to slight vibrations from the electro-luminescent source, which is normal and not a sign of malfunction.
• The backlight automatically turns off whenever an alarm sounds.

Auto-Backlight Mode Precautions

• Avoid wearing the watch on the inside of your wrist. This can cause the auto-backlight function to activate unintentionally, significantly reducing battery life.
• The backlight turns off automatically after approximately two seconds, even if you continue to hold the watch parallel to the ground.
• The backlight may not activate if your hand's position deviates from horizontal by more than 15°. Ensure your hand is held parallel to the ground.

Diagram shows hand positions: Parallel to ground, Raised more than 15°, Lowered more than 15°.

• Static electricity or magnetic fields can interfere with the auto-backlight function. If it does not activate, return the watch to its original position (parallel to the ground), then tilt it towards you again. If this does not help, lower your arm along your body, then raise it again and follow the procedure described above.
• Under certain conditions, the backlight may activate up to 1 second after performing the above actions. This is normal and does not indicate a malfunction.

World Time Mode

• Second counts in World Time Mode are synchronized with Timekeeping Mode.
• The watch calculates time differences from GMT based on Coordinated Universal Time data.
• Average monthly temperatures displayed are based on data from the World Climate Table provided at the end of this manual, published by the Japan Meteorological Agency.

Features for Direction and Temperature Measurement

• The display of temperature and direction readings is interrupted during alarm or hourly chime signals. If this happens, repeat the display procedure.
• If the watch is not held horizontally during direction measurement, the results will be inaccurate.
• If data is already stored in a memory cell for orientation, new data will overwrite the old data.

Digital Compass Function Features

This watch has a built-in magnetic sensor for measuring azimuth, which is sensitive to the Earth's magnetic field. The North direction indicated by the watch is Magnetic North, which differs slightly from Geographic North. Magnetic North is located in northern Canada, while Magnetic South is in southern Australia. The difference between Magnetic North and Geographic North increases as you approach the magnetic poles. Some maps show Geographic North, so be aware of this difference when using maps.

Azimuth Values

Azimuth values displayed on the watch represent the angle measured clockwise from Magnetic North (0 degrees) to the direction indicated by the watch's 12 o'clock mark.

Diagram shows Magnetic North, the 12 o'clock mark, and the azimuth angle.

Influence of Measurement Location on Azimuth Accuracy

• Serious errors in readings can occur when using the digital compass near strong magnets. Avoid using it near: permanent magnets (magnetic necklaces, bracelets, etc.), large iron objects (iron doors, safes), high-voltage wires, antennas, or household appliances (TVs, computers, washing machines, refrigerators, etc.).
• Accurate direction measurements are not possible on trains, boats, or airplanes.
• Accurate measurements are also difficult indoors, especially in reinforced concrete structures, due to the magnetic fields generated by household appliances and metal frameworks.

Storage

• Compass measurement accuracy may decrease if the watch becomes magnetized. Avoid storing the watch near objects with strong magnetic fields, such as permanent magnets or household appliances.
• If you suspect your watch has become magnetized, perform one of the calibration procedures described in "Digital Compass Calibration."

Digital Compass Calibration

If you find the digital compass is giving inaccurate results, it needs calibration.

There are two calibration procedures: Two-Direction Calibration and North Calibration.

• Two-Direction Calibration: Use this if the compass is affected by strong magnetic fields interacting with the Earth's magnetic field. It's also used if the watch has become magnetized.
• North Calibration: This procedure involves simply pointing the watch to North (using another compass or method). This can be used to set the watch to Geographic North instead of Magnetic North.

Important:

• If performing both calibrations, do Two-Direction Calibration first, then North Calibration. Two-Direction Calibration resets any previous North Calibration settings.
• The accuracy of your digital compass depends on the precision of the Two-Direction Calibration. Perform it whenever you use the compass in a new location or environment, or if you suspect inaccurate readings.

How to Perform Two-Direction Calibration

1. In Orientation Mode, press and hold button 'A' until "-1-" appears at the top of the display.

Diagram shows "-1-" indicator at the top of the display.

2. The magnetic north indicator will flash, indicating readiness for the first direction calibration. Place the watch on a flat, horizontal surface and press button 'C' to perform the first calibration.
3. After calibration is complete, "OK" will appear. The display will then show "-2-" and the magnetic north indicator will flash for the second direction calibration.
4. Rotate the watch 180°.
5. Press button 'C' again to perform the second calibration.
6. After calibration is complete, "OK" will appear. The watch will automatically return to the Orientation Mode display.

Features of Two-Direction Compass Calibration:

• You can use any two opposite directions for calibration, but they must be 180° apart. Incorrect calibration will lead to inaccurate readings.
• Do not move the watch for one or two seconds after pressing 'C' during calibration. If you do, "ERR" will appear. If this happens, restart the calibration.
• "ERR" may also appear due to local interference. If you suspect this, move to a different location and restart the procedure.
• Perform calibration under the conditions you intend to use the digital compass. For example, if you plan to use it in an open field, calibrate it in an open field.

How to Perform North Calibration

1. In Orientation Mode, press and hold button 'A' until "-1-" appears at the top of the display.

Diagram shows "-1-" indicator at the top of the display.

2. Press button 'D' to start the North Calibration procedure.

Diagram shows "0°" indicator appearing.

3. Place the watch on a flat, horizontal surface and align the 12 o'clock mark with North (use another compass to determine North).
4. Press button 'C' to start the calibration.
5. After calibration is complete, "OK" will appear. The watch will automatically return to the Orientation Mode display.

Questions and Answers

Q: Why are direction readings inaccurate?

A: Possible causes include:

• Improper two-direction calibration of the digital compass. Perform two-direction calibration, especially after battery replacement.
• Proximity to a strong magnetic field source (appliances, steel structures, high-voltage wires, etc.). Move the watch away from such objects and try again. Do not use the digital compass on trains or boats.

Q: Why does the digital compass give different results in the same location?

A: Magnetic fields from nearby high-voltage wires can affect readings. Move the watch away from these wires and try measuring again.

Q: "--" appears instead of a direction reading. What does this mean?

A: This indicates the watch is affected by a strong magnetic field. Move the watch to a different location and try measuring again.

Q: Why are digital compass results inaccurate indoors?

A: Appliances like TVs, computers, and speakers generate magnetic fields that interfere with the Earth's magnetic field. Move the watch away from the source or use it outdoors. It is particularly difficult to use the digital compass inside reinforced concrete structures. Avoid using it on trains or airplanes.

Q: What do the numbers on the circular scale represent?

A: The circular scale shows degrees, increasing counter-clockwise. These numbers help determine the angle between your direction and Magnetic North. For example, if the magnetic north indicator is near "90", it means the angle is 90° (the 12 o'clock mark points East).

Technical Specifications

• Timekeeping Accuracy: ±15 seconds per month (at normal temperatures).
• Timekeeping: Hour, Minute, Second, AM/PM, Month, Date, Day of Week.
• Calendar System: Auto-calendar, programmed from 1995 to 2039.
• Other Functions: Azimuth and temperature readings, temperature sensor calibration.
• Orientation Mode: Azimuth and temperature readings.
• Azimuth Range: 0° to 359°.
• Temperature Range: -10.0°C to +60.0°C (in 0.1°C increments).
• Memory Capacity: Up to 5 data sets, each including direction, temperature, and time of measurement.
• Other Functions: Compass calibration (two-direction and North calibration).
• World Time Mode: Displays current time and average temperature for 27 cities (29 time zones).
• Alarm Mode: 3 multi-function alarms, hourly chime.
• Stopwatch Mode: 1/100 second accuracy. Maximum measurement time: 23 hours, 59 minutes, 59.99 seconds. Measurement modes: elapsed time, split time, 1st and 2nd finish times.
• Timer Mode: 1/10 second unit. Setting range: 1 second to 24 hours. Auto-repeat function.
• Direction Reading Accuracy: Max ±10° (at ambient temperatures of 10°C to 40°C).
• Temperature Sensor Accuracy: ±2.0°C within the temperature range of -10.0°C to +60.0°C.
• Other Functions: Backlight (electro-luminescent panel), warning indicators.
• Power: Two silver-oxide batteries (Type SR927W).
• Battery Life: Approximately 18 months for SR927W batteries (assuming 2 seconds of backlight use per day, 20 seconds of alarm use per day, 3 direction measurements per day, or 33 temperature measurements per day). Battery life is reduced with more frequent backlight use or direction readings.

Care for Your Watch (УХОД ЗА ЧАСАМИ)

Battery

Replace batteries immediately when signs of depletion appear (dim display, no backlight) by visiting a dealer or distributor.

Water Resistance

Watches are classified by water resistance levels (I to V). Refer to the table below for usage rules.

Notes:

• Grade I watches are not water-resistant. Avoid all contact with moisture.
• Do not press buttons underwater.
• Grade III watches can be used for swimming. If exposed to saltwater, rinse thoroughly with fresh water and dry.
• Grade IV and V watches can be used for scuba diving (except for depths requiring helium-oxygen gas mixtures).
• Some water-resistant watches have leather straps. Do not wear these models while swimming or engaging in activities that may expose the strap to water.

General Care

• These watches are designed for use in harsh conditions, with shock-absorbing gaskets to protect internal circuits from impact and vibration.
• Shock Resistance: Suitable for active sports. Avoid hitting the crystal with hard objects.
• Vibration Resistance: Suitable for activities like motorcycling, using chainsaws, or drilling stone.
• Never attempt to open the watch case or remove the back cover.
• Replace the gasket (which protects against moisture and dust) every 2-3 years.
• If moisture enters the watch, have it checked by a dealer immediately.
• Avoid exposing the watch to extreme temperatures.
• Do not wear the strap too tightly; allow a finger to fit between the strap and your wrist.
• Clean the watch and strap with a dry, soft cloth, or a soft cloth dampened with a mild neutral detergent solution. Never use volatile substances like gasoline, solvents, or aerosol cleaners.
• Avoid contact with hairspray, cologne, sunscreen, or other toiletries, as they can damage plastic parts. If contact occurs, wipe immediately with a dry cloth.
• Store the watch in a dry place when not in use.
• Avoid contact with gasoline, solvents, aerosols, adhesives, or paint, as chemical reactions can damage gaskets, cases, and finishes.
• Some models have silk-screened designs on the strap. Clean these carefully to avoid damaging the designs.
• Keep this manual and any other supplied documentation in an easily accessible place.

For Watches with Polymer Straps

• A white powdery substance may appear on the strap. This is harmless and can be easily removed by wiping with a cloth.
• Exposure of polymer straps to moisture or prolonged storage in humid conditions can cause damage, tearing, or cracking. To ensure longevity, wipe the strap clean of dirt and water frequently with a soft cloth.

For Watches with Fluorescent Cases and Straps

• Prolonged exposure to direct sunlight can degrade the fluorescent coating.
• Prolonged contact with moisture can also degrade the fluorescent coating. Wipe off any moisture immediately.
• Prolonged contact with other damp surfaces can cause discoloration of the fluorescent coating. Keep the fluorescent surface dry and avoid contact with other surfaces.
• Strong friction of the fluorescent surface against other surfaces can cause the fluorescent paint to wear off.

Sensor

The sensor in your watch is highly accurate. Never attempt to disassemble or repair it yourself. Keep the sensor area free of sand, dirt, and other foreign matter. Rinse with clean water when cleaning. Do not insert needles or other sharp objects into the sensor openings.

City Code Table (Таблица кодов городов)

Product Information

Name: Wristwatch / Electronic-Mechanical Quartz Watch (Men's/Women's)

Brand: CASIO

Manufacturer: CASIO COMPUTER Co., Ltd.

Manufacturer Address: 6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan

Importer: CASIO LLC, Moscow, ul. Sushchevskaya, d.27, str. 1, Russia

Country of Origin: Japan

Warranty Period: 1 year

Authorized Service Organization Address: As specified in the warranty certificate.

Product Compliance: Complies with GOST 26270-98 (Clause 4.35). Certificate of Conformity No. ROSS JP. AY46.D00003.