Operation Guide 5113 5213
| To turn the auto light switch on and off | Auto light switch precautions |
1. In the Timekeeping Mode, hold down E until each of the following steps occurs.
• Hold SET appears on the digital display. ➝ HT flashes. ➝ Second hand points to the current Home City code.
2. Use D to cycle through the settings on the digital display until the current auto light switch setting (AT OFF or AT On) is flashing on the digital display.
•See step 3 under “To change the current time and date settings” (page
3.Press A to toggle the auto light switch setting between on (On) or off (OFF).
4.After the setting is the way you want, press E to exit the setting screen.
Illumination Precautions•Frequent use of illumination can run down the battery, which will require exposing the watch to light for charging.
The following guidelines give an idea of the charging time required to recover from a single illumination operation.
Approximately five minutes exposure to bright sunlight coming in through a window Approximately 50 minutes exposure to indoor fluorescent lighting
•Illumination may be hard to see when viewed under direct sunlight.
•Illumination turns off automatically whenever an alarm sounds.
•Frequent use of illumination runs down the battery.
•Wearing the watch on the inside of your wrist, movement of your arm, or vibration of your arm can cause frequent activation of the auto light switch and illumination. To avoid running down the battery, turn off the auto light switch whenever engaging in activities that might cause frequent illumination.
•Note that wearing the watch under your sleeve while the auto light switch is turned on can cause frequent illumination and can run down the battery.
•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.
Button Operation Tone |
| Troubleshooting |
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.
To turn the button operation tone on and off1. In the Timekeeping Mode, hold down E until each of the following steps occurs.
• Hold SET appears on the digital display. ➝ HT flashes. ➝ Second hand points to the current Home City code.
2. Use D to cycle through settings on the digital display until the current button operation tone (MUTE or BEEP 
) is displayed.
•See step 3 under “To change the current time and date settings” (page
3.Press A to toggle the button operation tone between on (BEEP 
) or off (MUTE).
4.After the setting is the way you want, press E to exit the setting screen.
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
■The time indicated by the hands is different from the time shown on the digital display
If the displayed time and the time indicated by the hands do not match, it could mean that the hand home positions are off. Use the Hand Home Position Adjustment Mode (page
When TOKYO (TYO) is selected as the Home City, the altitude unit is set automatically to meters (m), the barometric pressure unit to hectopascals (hPa), and the temperature unit to Celsius (°C). These settings cannot be changed.
■“Err” appears on the digital 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 digital display and sensor operations will be disabled.
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| Compass Reading | Barometric Pressure | Temperature Reading | Altitude Reading |
| Reading |
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•If Err appears while a measurement operation is being performed in a sensor mode, restart the measurement. If Err appears on the digital 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 Compass Mode, Barometer/Thermometer Mode, or Altimeter Mode sensor may be disabled if there is not enough voltage available to power it sufficiently. In this case, Err will appear on the digital display. This does not indicate malfunction, and sensor operation should resume once battery voltage returns to its normal level.
•If Err keeps appearing during measurement, it could mean there is a problem with the applicable sensor.
■“Err” appears on the digital 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.
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.
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 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
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
■Why doesn’t the second hand indicate the barometric pressure differential when I enter the Barometer/Thermometer Mode?
•This could indicate sensor error. Try pressing B again.
•The barometric pressure differential is not indicated by the second hand if the pressure reading is outside the allowable measurement range (260 to 1,100 hPa).
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
This can happen after the power level drops to Level 5 (page
Specifications
Accuracy at normal temperature: ±15 seconds a monthDigital Timekeeping: Month, day, day of the week Calendar: Full auto calendar from 2000 to 2099.
Other: Two display formats (day of the week and barometric pressure graph)
Analog Timekeeping: Hour, minute (moves every 10 seconds), second
Other: Home City code (can be assigned one of 29 city codes and Coordinated Universal Time); Standard Time/Daylight Saving Time (summer time)
Compass: 20 seconds continuous measurement; 16 directions; Angle value 0° to 359°; Hand indication of north; Calibration (bidirectional, northerly); Magnetic declination correction
Barometer:Measurement and display range:
260 to 1,100 hPa (or 7.65 to 32.45 inHg) Display unit: 1 hPa (or 0.05 inHg)
Measurement timing: Daily from midnight, at two hour intervals (12 times per day); Every five seconds in the Barometer/Thermometer Mode
Other: Calibration; Manual measurement (button operation); Barometric pressure graph; Hand indication of pressure differential
Thermometer:Measurement and display range:
Display unit: 0.1°C (or 0.2°F)
Measurement timing: Every five seconds in the Barometer/Thermometer Mode
Other: Calibration; Manual measurement (button operation)