G-Shock GDF-100 - Manual (Page 6)

Operation Guide 3255
E-50
To turn an alarm and the Hourly Time Signal on and off
1. In the Alarm Mode, use
C to select an alarm or the Hourly Time Signal.
2. When the alarm or the Hourly Time Signal you want is selected, press A to toggle
it between on and off.
• The alarm on indicator (when any alarm is on) and
the Hourly Time Signal on indicator (when the
Hourly Time Signal is on) are shown on the display
in all modes.
To stop the alarm
Press any button.
Hourly time signal
on indicator
Alarm on indicator
Hourly time signal
on indicator
Alarm on indicator
E-51
Illumination
The display of the watch is illuminated for easy reading in
the dark.
To turn on illumination
In any mode (except when a setting screen is on the
display), press
D to illuminate the display.
• You can use the procedure below to select either one
second or three seconds as the illumination duration.
When you press
D, the display will remain illuminated
for about one second or three seconds, depending on
the current illumination duration setting.
To change the illumination duration
1. In the Timekeeping Mode, hold down
A until the currently selected city code starts
to fl ash. This is the city code setting screen.
• Before the city code starts to fl ash, the message SET Hold will appear on the
display. Keep A depressed until SET Hold disappears and the city code
starts to fl ash.
E-52
2. Keep pressing B until LT1 or LT3 is displayed in the upper left corner of the
display.
• See step 3 under “To change the current time and date settings” (page E-17)
for information about how to scroll through setting screens.
3. Press C to toggle the illumination duration between three seconds (LT3 displayed)
and one second (LT1 displayed).
4. After the settings are the way you want, press A to exit the setting screen.
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.
E-53
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, and
Countdown Timer Mode alarm all operate normally.
To turn the button operation tone on and off
1. In the Timekeeping Mode, hold down A until the
currently selected city code starts to fl ash. This is the
city code setting screen.
• Before the city code starts to fl ash, the message
SET Hold will appear on the display. Keep A
depressed until SET Hold disappears and the city
code starts to fl ash.
E-54
2. Keep pressing B until MUTE or KEY is displayed in the upper left corner of the
display.
• See step 3 under “To change the current time and date settings” (page E-17)
for information about how to scroll through setting screens.
3. Press C to toggle the button operation tone between
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.
Mute indicator Mute indicator
E-55
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.
■ 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
E-17) to change the standard time/daylight saving time (DST) setting.
Sensor modes
■ I can’t change the temperature, barometric pressure, and altitude 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.
E-56
■ The battery indicator ( ) appears while a sensor operation is being
performed.
The battery indicator appears in the upper left corner of
the digital display whenever there is not enough battery
power available to perform a sensor operation in the
Barometer/Thermometer Mode or Altimeter Mode. Sensor
operation is disabled while the battery indicator is
displayed.
• Normal operation should return after battery power
recovers.
■ “ERR” appears while a sensor operation is in progress.
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.
Battery indicator Battery indicator
E-57
Barometric
Pressure/Temperature
Measurement
Altitude
Measurement
• 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.
• Barometer/Thermometer Mode and Altimeter Mode sensor operations are disabled
whenever there is not enough battery power available to perform a sensor
operation. This is true regardless of the current battery level. 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.
E-58
• If ERR keeps appearing during measurement, it could mean there is a problem with
the applicable sensor.
Whenever you have a sensor malfunction, take the watch to your original dealer or
nearest authorized CASIO distributor as soon as possible.
■ The barometric pressure differential pointer does not appear on the display
when I enter the Barometer/Thermometer Mode.
• This could indicate sensor error. Try using B to re-enter the Barometer/
Thermometer Mode.
• The barometric pressure differential pointer is not displayed when the displayed current
barometric value is outside of 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
E-41) for more information.
E-59
Specifi cations
Accuracy at normal temperature: ±15 seconds a month
Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 48 city codes); Standard Time /
Daylight Saving Time (summer time)
Altimeter:
Measurement range: –700 to 10,000 m (or –2,300 to 32,800 ft.) without reference
altitude
Display range: –10,000 to 10,000 m (or –32,800 to 32,800 ft.)
Negative values can be caused by readings produced based on a reference
altitude or due to atmospheric conditions.
Display unit: 5 m (or 20 ft.)
Measurement timing: 5-second interval for fi rst 3 minutes followed by 2-minute
interval for next 10 hours
Other: Reference altitude setting