Operation Guide 3261 3281
•Illumination may not turn on if the face of the watch is more than 15 degrees above or below parallel. Make sure that the back of your hand is parallel to the ground.
• Illumination turns off after the preset illumination duration (page
•Static electricity or magnetic force can interfere with proper operation of the auto light switch. If illumination does not turn on, try moving the watch back to the starting position (parallel with the ground) and then tilt it back towards your face again. If this does not work, drop your arm all the way down so it hangs at your side, and then bring it back up again.
•You may notice a very faint clicking sound coming from the watch when it is shaken back and forth. This sound is caused by mechanical operation of the auto light switch, and does not indicate a problem with the watch.
Graphic Area
The information shown in the graphic area depends on the current mode.
Graphic Area | Mode | Graphic Area |
| Timekeeping Mode | Timekeeping Mode seconds |
| World Time Mode | World Time Mode hours |
| Alarm Mode | Timekeeping Mode hours |
| Stopwatch Mode | Stopwatch Mode minutes |
| CountdownTimer Mode | CountdownTimer Mode minutes |
Button Operation Tone
To turn the button operation tone on and off
The button operation tone sounds any time you press one of the watch’s buttons. You can turn the button operation tone on or off as desired.
•Even if you turn off the button operation tone, the alarm, Hourly Time Signal, and Countdown Timer Mode alarm all operate normally.
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1.In the Timekeeping Mode, hold down A until SET starts to flash and the city name starts to scroll on the display.
•This is the setting screen.
2.Keep pressing D until KEY
or MUTE is displayed.
•See step 3 under “To change the current time and date settings” (page
3.Press E to toggle the button operation tone on (KEY 
) and off (MUTE).
4.After the settings are the way you want, press A to exit the setting screen.
Note
•The mute indicator is displayed in all modes when the button operation tone is turned off.
Troubleshooting
Time Setting
■The current time setting is off by one hour.
You may need to change your Home City’s standard time/daylight saving time (DST) setting. Use the procedure under “To change the current time and date settings” (page
Sensor modes
■I can’t change the temperature unit setting.
The temperature unit setting is always Celsius (°C) whenever TOKYO is selected as the Home City. In this case, the setting cannot be changed.
•If ERR keeps appearing during measurement, it could mean there is a problem with the applicable sensor.
■ERR appears on the display after I perform bidirectional calibration or northerly calibration.
If - - - appears and then changes to ERR (error) on the calibration screen, it means that there is something wrong with the sensor.
•If ERR disappears after about one second, try performing the calibration again.
•If ERR keeps appearing, contact your original dealer or nearest authorized CASIO distributor to have the watch checked.
■ERR appears on the display after I perform northerly calibration.
The ERR message indicates there may be some problem with the sensor. The ERR message also may be due to movement of the watch while the calibration procedure is being performed. Try performing calibration again, taking care to ensure that the watch is not moved.
If this does not solve the problem, the problem may be due to some nearby source of terrestrial magnetism. Try performing the calibration procedure again from the beginning.
■Why am I having problems taking direction readings indoors?
A TV, personal computer, speakers, or some other object is interfering with terrestrial magnetism readings. Move away from the object causing the interference or take the direction reading outdoors. Indoor direction readings are particularly difficult inside
World Time Mode
■The time for my World Time City is off in the World Time Mode.
This could be due to incorrect switching between standard time and daylight saving time. See “To specify standard time or daylight saving time (DST) for a city” (page
Charging
■The watch does not resume operation after I expose it to light.
This can happen after the power level drops to Level 5 (page
■“ERR” appears on the display while I am using a sensor.
Subjecting the watch to strong impact can cause sensor malfunction or improper contact of internal circuitry. When this happens, ERR (error) will appear on the display and sensor operations will be disabled.
•If ERR appears while a measurement operation is being performed in a sensor mode, restart the measurement. If ERR appears on the display again, it can mean there is something wrong with the sensor.
•Even if battery power is at Level 1 (H) or Level 2 (M), the Digital Compass/ Thermometer Mode sensor may be disabled if there is not enough voltage available to power it sufficiently. In this case, ERR will appear on the display. This does not indicate malfunction, and sensor operation should resume once battery voltage returns to its normal level.
Whenever you have a sensor malfunction, take the watch to your original dealer or nearest authorized CASIO distributor as soon as possible.
■What causes incorrect direction readings?
•Incorrect bidirectional calibration. Perform bidirectional calibration (page
•Nearby source of strong magnetism, such as a household appliance, a large steel bridge, a steel beam, overhead wires, etc., or an attempt to perform direction measurement on a train, boat, etc. Move away from large metal objects and try again. Note that digital compass operation cannot be performed inside a train, boat, etc.
■What causes different direction readings to produce different results at the same location?
Magnetism generated by nearby
Specifications
Accuracy at normal temperature: ±15 seconds a month
Timekeeping: Hour, minutes, seconds, p.m. (P), year, month, day, day of the week Time format:
Calendar system: Full
Other: Home City name (can be assigned one of 48 city names); Standard Time / Daylight Saving Time (summer time)
Digital Compass: 20 seconds continuous measurement; 16 directions; Angle value 0°
to 359°; Four direction pointers; Calibration (bidirectional, northerly); Magnetic declination correction; Bearing Memory
Thermometer:
Measurement and display range:
Display unit: 0.1°C (or 0.2°F)
Measurement timing: Every five seconds in the Digital Compass/Thermometer Mode
Other: Calibration; Manual measurement (button operation)