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E-80
Note
• The auto light switch is always disabled, regardless of its on/off setting, when any one of the following
conditions exists.
While an alarm is sounding
While a bearing sensor calibration operation is being performed in the Digital Compass Mode
While a sunrise or sunset time is being calculated
While in a sensor mode, an auto light switch operation is performed after a sensor reading
To turn the auto light switch on and off
In the Timekeeping Mode, hold down
L
for at least three seconds to
toggle the auto light switch on (
LT
displayed) and off (
LT
not displayed).
• The auto light switch on indicator (
LT
) is on the display in all modes
while the auto light switch is turned on.
• The auto light switch remains enabled for about six hours. After that
disables automatically.
Auto light switch on
indicator
Auto light switch on
indicator
E-81
Illumination Precautions
• 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.
Auto light switch precautions
• 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 E-78), even if you
keep the watch pointed towards your face.
• 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.
E-82
Button Operation Tone
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, barometric pressure
change alert, and Countdown Timer Mode alarm all operate normally.
To turn the button operation tone on and off
1. In the Timekeeping Mode, hold down
E
for at least two seconds.
First,
SET Hold
will fl ash on the display, and
CITY
will be displayed in
the upper display. After that, the currently selected city code and city
name will scroll across the upper display. Keep
E
depressed until the
scrolling starts.
2. Use
D
to cycle through settings on the display until the current button
operation tone (
MUTE
or
key
) is displayed.
• See the sequence in step 2 of the procedure under “To change the
current time and date settings” (page E-16) for information about
how to scroll through setting screens.
3.
Press
A
to toggle the button operation tone on (
key
) and off (
MUTE
).
4. After all of the settings are the way you want, press
E
twice to exit the
setting screen.
Note
• The mute indicator is displayed in all modes when the button
operation tone is turned off.
Mute indicatorMute indicator
E-83
Low Battery Indication
A low battery indicator appears on the display when battery power is low. Have the battery replaced as
soon as possible.
Note
• For information about battery life guidelines and supported battery types, see the product
specifi cations.
See “Specifi cations” (page E-89).
The functions below are disabled while the low battery indicator is fl ashing.
• All functions, except for the low battery indicator and timekeeping
• Updating of the barometric pressure change indicator
• Updating of trek log values
• Auto Light
Note
• Sequentially or repeatedly performing sensor, light, alarm, and other power intensive operations
over a short period can cause a sudden drop in battery power, which will make the low battery
indicator fl ash. Even though the low battery indicator may disappear and watch functions may
become re-enabled, battery replacement is recommended.
Low battery indicatorLow battery indicator
E-84
Troubleshooting
Time Setting
■
The current time setting is off by hours.
Your Home City setting may be wrong (page E-14). Check your Home City setting and correct it, if
necessary.
Altitude Readings
■
Altitude readings produce different results at the same location.
■
Readings produced by the watch are different from the elevation and/or sea level altitude
indications in my area. (Negative sea level altitude values are produced in a location where the
indicated elevation is a positive value.)
■
I can’t get correct altitude readings.
Relative altitude is calculated based on changes in barometric pressure measurement by its pressure
sensor. This means that barometric pressure changes can cause readings taken at different times at the
same location to be different. Also note that the value displayed by the watch may be different from the
actual elevation and/or sea level elevation indicated for the area where you are located.
When using the altimeter of this watch for mountain climbing or other activities, it is highly recommended
that you check a map, local altitude indications, or some other source for your current correct altitude and
regularly calibrate the altimeter with the latest information.
For more information, see “To specify a reference altitude value” (page E-47).
E-85
Taking Direction Readings
■
Abnormal magnetism detection is indicated.
• Move away from any potential source of strong magnetism and try
taking a reading again.
• If abnormal magnetism is detected again when you retry, it could mean
that the watch itself has become magnetized. If this happens, continue
to keep away from the source of strong magnetism, perform
bidirectional calibration, and then try taking a reading again. For more
information, refer to “To perform bidirectional calibration” (page E-23)
and “Location” (page E-27).
■
ERR appears on the digital display during sensor reading operations.
There is something wrong with the sensor. This could be due to nearby strong magnetic force. Move
location where magnetism is not present and try again. If, after multiple retries,
ERR
keeps appearing,
contact your original retailer or CASIO service center. See “Location” (page E-27).
■
ERR appears following bidirectional calibration.
If the screen displays hyphens (
- - -
) followed by the
ERR
(error) indicator, it could mean there is
something wrong with the sensor.
• Wait for about one second for the
ERR
indicator to disappear from the display, and then calibrate the
sensor again.
• If
ERR
continues to appear even after multiple attempts to calibrate, contact your original retailer or
CASIO service center.
E-86
■
The direction information indicated by the watch is different from that indicated by a backup
compass.
• Move away from and potential source of strong magnetism, perform bidirectional calibration, and then
try taking a reading again. For more information, refer to “To perform bidirectional calibration” (page
E-23) and “Location” (page E-27).
■
Direction readings produce different results at the same location.
• Move away from any potential source of strong magnetism and try taking a reading again. See
“Location” (page E-27).
■
I am having problems taking direction readings indoors.
• Move away from any potential source of strong magnetism and try taking a reading again. See
“Location” (page E-27).
Whenever you have a sensor malfunction, take the watch to your original dealer or nearest authorized
CASIO distributor as soon as possible.
Barometric Pressure Readings
■
The barometric pressure differential pointer does not appear on the display when I enter the
Barometer/Thermometer Mode.
• The reading value is outside of the allowable measurement range. See page E-32.
Calibrate the pressure sensor (page E-38).
• There may be a problem with the sensor. If
ERR
(error) is on the digital display, refer to “Direction,
Barometric Pressure, Temperature, and Altitude Readings” for more information.
E-87
Direction, Barometric Pressure, Temperature, and Altitude Readings
■
ERR appears on the digital display during sensor reading operations.
This indicates that there is a problem with the sensor, making sensor readings impossible.
• If the error is indicated while a reading operation in progress, restart the operation. If
ERR
appears
again, it could mean there is something wrong with the sensor.
• If
ERR
appears frequently, it could mean that the sensor is faulty. Contact your original retailer or
CASIO service center
■
I can’t change the temperature, barometric pressure, and altitude display units.
When
TYO
(Tokyo) 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.
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 E-77) for more information.
Operation Guide 3439