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Operation Guide 2872
7
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
• The flashing CHARGE indicator at Level 3 tells you that battery power is
very low, and that exposure to bright light for charging is required as soon
as possible.
Battery power
indicator
Level
1
2
3
4
Battery Power
Indicator
Function Status
All functions enabled.
All functions enabled.
Except for timekeeping and
battery power indicator, all
functions and display indicators
are disabled.
All functions disabled.
(Charge Soon Alert)
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
• At Level 4, all functions are disabled, memory contents are cleared, and
settings return to their initial factory defaults. Functions are enabled once
again after the rechargeable battery is charged, but you need to set the
time and date after the battery reaches Level 3 (indicated by the L
indicator) from Level 4. You will not be able to set any of the other settings
until the battery reaches Level 2 (indicated by the M indicator) after
dropping to Level 4.
• Display indicators reappear as soon as the battery is charged from Level 4
to Level 3.
• Leaving the watch exposed to direct sunlight or some other very strong light
source can cause the battery power indicator to temporarily show a reading
that is higher than the actual battery level. The correct battery level should
be indicated after a few minutes.
• If you use the backlight or alarms a number of
times during a short period, RECOV. appears
on the display and the backlight, alarm,
countdown timer alarm, hourly time signal, and
sensor operations become disabled until
battery power recovers.
After some time, battery power will recover and
RECOV. will disappear, indicating that the
above functions are enabled again.
• Even if battery power is at Level 1 or Level 2, the Digital Compass Mode,
Barometer/Thermometer Mode, or Altimeter Mode sensor may be disabled
if there is not enough voltage available to power it sufficiently. This is
indicated by RECOV. on the display.
If battery power goes low while a measurement operation is in progress,
the value produced by the last successful measurement operation remains
on the display. Attempting to perform a sensor operation in the Digital
Compass Mode will cause xxx to appear on the display. In other sensor
modes, the display will go blank. In the case of temperature, the last
successfully measured value will appear on the display.
Recover indicator
• If RECOV. appears frequently, it probably means that remaining battery
power is low. Leave the watch in bright light to allow it to charge.
Charging Precautions
Certain charging conditions can cause the watch to become very hot. Avoid
leaving the watch in the areas described below whenever charging its
rechargeable battery.
Also note that allowing the watch to become very hot can cause its liquid
crystal display to black out. The appearance of the LCD should become
normal again when the watch returns to a lower temperature.
Warning!
Leaving the watch in bright light to charge its rechargeable battery can
cause it to become quite hot. Take care when handling the watch to
avoid burn injury. The watch can become particularly hot when exposed
to the following conditions for long periods.
• On the dashboard of a car parked in direct sunlight
• Too close to an incandescent lamp
• Under direct sunlight
Charging Guide
After a full charge, timekeeping remains enabled for up to about six months.
• The following table shows the amount of time the watch needs to be
exposed to light each day in order to generate enough power for normal
daily operations.
Approximate
Exposure Time
5 minutes
24 minutes
48 minutes
8 hours
Exposure Level (Brightness)
Outdoor Sunlight (50,000 lux)
Sunlight Through a Window (10,000 lux)
Daylight Through a Window on a Cloudy Day (5,000 lux)
Indoor Fluorescent Lighting (500 lux)
Recovery Times
The table below shows the amount exposure that is required to take the
battery from one level to the next.
• The above exposure time values are all for reference only. Actual required
exposure times depend on lighting conditions.
Approximate Exposure Time
Level 4 Level 3 Level 2 Level 1
2 hours 16 hours 5 hours
4 hours 81 hours 23 hours
7 hours 165 hours 45 hours
88 hours - - - - - - - - - - - - - - - -
Exposure Level
(Brightness)
Outdoor Sunlight
(50,000 lux)
Sunlight Through a
Window (10,000 lux)
Daylight Through a
Window on a Cloudy
Day (5,000 lux)
Indoor Fluorescent
Lighting (500 lux)
▲
▲
▲
• Since these are the specs, we can include all the technical details.
• Watch is not exposed to light
• Internal timekeeping
• Display on 18 hours per day, sleep state 6 hours per day
• 1 backlight operation (1.5 seconds) per day
• 10 seconds of alarm operation per day
• 10 digital compass operations per week
• 10 hours of altimeter measurements, once per month
• Stable operation is promoted by frequent charging.
Reference
This section contains more detailed and technical information about watch
operation. It also contains important precautions and notes about the various
features and functions of this watch.
Auto Return Features
• The watch automatically returns to the Timekeeping Mode if you do not
perform any button operation for two or three minutes in the Data Recall,
Alarm, Digital Compass, or Barometer/Thermometer Mode.
• If you do not perform any button operation while in the Altimeter Mode, the
watch automatically returns to the Timekeeping Mode after nine or 10
hours.
• If you leave a screen with flashing digits on the display for two or three
minutes without performing any operation, the watch automatically exits the
setting screen.
• Holding down C for about one second while in the Stopwatch, Countdown
Timer, or Data Recall Mode returns to the Timekeeping Mode.
Scrolling
The B and D buttons are used on the setting screen to scroll through data
on the display. In most cases, holding down these buttons during a scroll
operation scrolls through the data at high speed.
Sensor Malfunction Indicator
Subjecting the watch to strong impact can cause its sensor to malfunction or
improper contact of internal circuitry. When this happens,
Err
(error) will
appear on the display and sensor operations will be disabled.
Barometric
Pressure
Measurement
Digital
Compass
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.
• Even if battery power is at Level 1 or Level 2, the Digital 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 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.
Whenever you have a sensor malfunction, be sure to take the watch to
your original dealer or nearest authorized CASIO distributor as soon as
possible.