Manual Casio 2894 (page 9 of 12) (English)

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Operation Guide 2894

Important!

• Storing the watch for long periods in an area where there is no light or

wearing it in such a way that it is blocked from exposure to light can cause

rechargeable battery power to run down. Be sure that the watch is normally

exposed to bright light whenever possible.

• This watch uses a special rechargeable battery to store power produced by

the solar cell, so regular battery replacement is not required. However, after

very long use, the rechargeable battery may lose its ability to achieve a full

charge. If you experience problems getting the special rechargeable battery

to fully charge, contact your dealer or CASIO distributor about having it

replaced.

• Never try to remove or replace the watch’s special battery yourself. Use of

the wrong type of battery can damage the watch.

• All data stored in memory is deleted, and the current time and all other

settings return to their initial factory defaults whenever battery power drops

to Level 5 and when you have the battery replaced.

• Turn on the watch’s Power Saving function and keep it in an area normally

exposed to bright light when storing it for long periods. This helps to keep

the rechargeable battery from going dead.

Battery Power Indicator and Recover Indicator

The battery power indicator on the display shows you the current status of the

rechargeable battery’s power.

Battery power

indicator

Level

Battery Power

Indicator

(Charge Soon Alert)

Function Status

All functions enabled.

Illumination, beeper, and

sensor operation disabled.

Except for timekeeping and

the

indicator, all

functions and display

indicators are disabled.

All functions disabled.

• The flashing LOW 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.

• At Level 5, all functions are disabled and settings return to their initial

factory defaults. Once the battery reaches Level 2 (indicated by M indicator)

after falling to Level 4, reconfigure the current time, date, and other

settings.

• Display indicators reappear as soon as the battery is charged from Level 4

to Level 2.

• Leaving the watch exposed to direct sunlight or some other very strong light

source can cause the battery power indicator to show a reading temporarily

that is higher than the actual battery level. The correct battery level should

be indicated after a few minutes.

• Performing multiple sensor, illumination, or

beeper operations during a short period may

cause RECOV to appear on the display.

Illumination, alarm, countdown timer alarm,

hourly time signal, and sensor operations will

be 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 RECOV appears frequently, it probably means that remaining battery

power is low. Leave the watch in bright light to allow it to charge.

Recover indicator

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.

• Since these are the specs, we can include all the technical details.

• Watch not exposed to light

• Internal timekeeping

• Display on 18 hours per day, sleep state 6 hours per day

• 1 illumination 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.

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)

Approximate

Exposure Time

5 minutes

21 minutes

42 minutes

7 hours

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 5 Level 4 Level 3 Level 2 Level 1

2 hours 13 hours 6 hours

4 hours 63 hours 29 hours

8 hours 128 hours 58 hours

80 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)

▲

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.

Power Supply

This watch is equipped with a solar cell and a special rechargeable battery

(secondary battery) that is charged by the electrical power produced by the

solar cell. The illustration shown below shows how you should position the

watch for charging.

Example: Orient the watch so its face is

pointing at a light source.

• The illustration shows how to position a

watch with a resin band.

• Note that charging efficiency drops when

any part of the solar cell is blocked by

clothing, etc.

• You should try to keep the watch outside

of your sleeve as much as possible. Even

if the face of the watch is only partially

blocked from light, charging will be

significantly reduced.

Solar cell

Scrolling

The A and C 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.

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Casio 2894 User Manual - German - 13 pages

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Casio 2894 Manual

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