Casio 1868 User Manual

Module No. 1868

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GETTING ACQUAINTED

Congratulations upon your selection of this CASIO watch. To get the most
out of your purchase, be sure to carefully read this User’s Guide and keep
it on hand for later reference when necessary.

About this User’s Guide

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Bearing bezel

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N

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Graphic area

Sensor

Press D to change from mode to mode. Each mode is explained on the
following pages.

• Button operations are indicated using the
letters shown in the illustration.

• Each section of this User’s Guide provides you

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with the information you need to perform
operations in each mode. Further details and

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technical information can be found in the
“REFERENCE” section.

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GENERAL GUIDE

1868-1

• The measurement functions built into this watch are not intended for
taking measurements that require professional or industrial precision.
Values produced by this watch should be considered as reasonable
representations only.

• When engaging in mountain climbing or other activities in which losing
your way can create a dangerous or life-threatening situation, always
be sure to use a second compass to confirm direction readings.

• CASIO COMPUTER CO., LTD. assumes no responsibility for any
loss, or any claims by third parties that may arise through the use of
this watch.

World Time Mode

Alarm Mode

Navigation Mode

Timekeeping Mode

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B

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Press D.

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BACKLIGHT

Auto light switch
on indicator

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Turning on the Backlight manually

In any mode (except for the World Time Mode), press B to illuminate the
display for about two seconds.

• The above operation turns on the backlight regardless of the current
auto light switch setting.

About the Auto Light Switch

Turning on the auto light switch causes the backlight to turn on for about two
seconds, whenever you position your wrist as described below in any mode.

• See “Backlight Precautions” for other important information about using
the backlight.

Moving the watch to a position that is parallel to the ground and then
tilting it towards you more than 40 degrees causes the backlight to light.

Warning!

• Never try to read your watch when mountain climbing or hiking in
areas that are dark or in areas with poor footing. Doing so is
dangerous and can result in serious personal injury.

• Never try to read your watch when running where there is danger of
accidents, especially in locations where there might be vehicular
or pedestrian traffic. Doing so is dangerous and can result in serious
personal injury.

• Never try to read your watch when riding on a bicycle or when operating
a motorcycle or any other motor vehicle. Doing so is dangerous and
can result in a traffic accident and serious personal injury.

• When you are wearing the watch, make sure that its auto light switch
is turned off before riding on a bicycle or operating a motorcycle or
any other motor vehicle. Sudden and unintended operation of the
auto light switch can create a distraction, which can result in a traffic
accident and serious personal injury.

The backlight uses an EL (electro-luminescent)
panel that causes the entire display to glow for
easy reading in the dark. The watch’s auto light

B

switch automatically turns on the backlight when
you angle the watch towards your face.

• The auto light switch must be turned on

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(indicated by the auto light switch on indicator)
for it to operate.

Parallel to
ground

More
than
40

°

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C

▲

Countdown Alarm Mode Stopwatch Mode

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To turn the auto light switch on and off

In the Timekeeping Mode, hold down B for two seconds to turn the auto
light switch on (Auto light switch on indicator displayed) and off (Auto light
switch on indicator not displayed).

• In order to protect against running down the batteries, the auto light switch
is automatically turned off approximately six hours after you turn it on.
Repeat the above procedure to turn the auto light switch back on if you
want.

• The auto light switch on indicator is on the display in all modes while the
auto light switch is turned on.

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TIMEKEEPING MODE

Use the Timekeeping Mode to set the current time and date, to take direction
and temperature readings, to select the temperature unit of measurement,
and to calibrate the temperature sensor.

Calibrating the Seconds Count

Hour : Minutes

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PM indicator

Day of week

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Seconds

Month – Day

3. Press A to return to the current time display.

Setting the Current Time

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Seconds

Day

Use the following procedure to calibrate the
seconds count on a time signal from a radio,
TV, or other source.

1. In the Timekeeping Mode, hold down A until
the seconds digits start to flash on the display.

2. Press C to set the seconds count to
when the time signal you are calibrating to
sounds.

• Pressing C while the seconds count is in

the range of 30 to 59 resets the seconds to

00 and adds 1 to the minutes. If the

seconds count is in the range of 00 to 29,
the minutes count is unchanged.

1. In the Timekeeping Mode, hold down A until

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the seconds digits start to flash on the display.

• The seconds digits are flashing because

they are

selected

2. Press D to move the flashing in the
sequence shown below to select other digits
and settings.

Hour

Minutes

.

12/24-Hour
Format

Month

00

Year

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3. While hour, minutes, year, month, or day is selected (flashing), press
C to increase the setting or B to decrease it.

• When the 12/24-hour setting is selected, use C to toggle between

12-hour (12H) and 24-hour (24H) timekeeping.

4. After the time and date are set the way you want them, press A to
return to the current time screen.

Notes

• The year can be set in the range of 1995 to 2039.

• The day of the week is automatically displayed in accordance with the

month and day setting.

• The watch’s built-in full automatic calendar automatically make allowances

for different month lengths and leap years. Once you set the date, there
should be no reason to change it except after the replacement of the
watch’s batteries.

Taking a Direction and Temperature Reading

Magnetic north pointer

Direction value

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Temperature

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C

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E

• The watch automatically returns to the current time and date screen if
you do not perform any operation for about 60 minutes.

Notes

• T o take a temperature reading only, simply press C in the Timekeeping
Mode. This also performs a direction reading, but the pointers and
direction value will not be accurate if the watch is not oriented correctly.

• The direction value shows the direction that the 12 o’clock position of the
watch is pointing as an angle value. See “Direction Values” for details.

• After you take a direction and temperature reading in the Timekeeping
Mode, temperature readings continue to be performed every two minutes.

• See “Temperature and Direction Reading Precautions” and “Digital
Compass Precautions” for other important information about taking
direction and temperature readings.

1. In the Timekeeping Mode, place the watch
on a flat surface or (if you are wearing the
watch), make sure that your wrist is horizontal

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(in relation to the horizon).

2. Press C to start a reading operation.

• After about one second, the current

temperature, the direction pointers and
direction value appear on the display.

• You can repeat steps 1 through 2 as many

times as you like.

3. Next, you can adjust the rotary direction bezel

so that the “N” or “L” mark is aligned with
the magnetic north pointer. This aligns all of
the markings on the bezel with their
applicable directions.

• After you are finished taking direction
readings, press D to return to the current
time and date screen.

Changing the Temperature Measurement Unit

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D

4. When the measurement unit you want is displayed, press A to return
to the measurement result screen.

• To return to the current time and date screen, press D.

1. In the Timekeeping Mode, press C to

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perform a direction and temperature reading.

2. Hold down A until the temperature value
starts to flash on the display.

3. While the temperature value is flashing, press
D to toggle it between Celsius (°C) and
Fahrenheit (°F).

Calibrating the Temperature Reading

The temperature sensor of this watch is calibrated at the factory before
shipment and further adjustment is normally not required. If you notice
significant error in the temperature readings produced by this watch, you
can adjust it to correct the error.

Important!

Incorrectly calibrating the temperature reading of this watch can result in
incorrect readings. Carefully read the following before doing anything.

• Compare the readings produced by the watch with those of another
reliable, accurate thermometer.

• If adjustment is required, remove the watch from your wrist and wait for
20 or 30 minutes to give the temperature of the watch time to stabilize.

To calibrate the temperature reading

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• To return the temperature reading to its initial factory default calibration,
press B and C at the same time.

• If you have selected Fahrenheit as your unit of measurement, the
above operations change the reading by 0.2°F.

• You can change the displayed temperature value by ±9.9°C (18.0°F).
The overall temperature reading adjustment range is –10.0°C to 60.0°C
(14.0°F to 140.0°F).

4. After calibrating the temperature, press A to return to the measurement
result screen.

• To return to the current time and date screen, press D.

1. In the Timekeeping Mode, press C to

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perform a direction and temperature reading.

2. Hold down A until the temperature value
starts to flash on the display.

3. Press of C to increase the displayed
temperature by 0.1°C. Pressing B
decreases it.

NAVIGATION MODE

The Navigation Mode provides you with storage for up to five sets of direction
and temperature data. Each set of data includes direction, temperature,
and the time the readings were taken.

Taking Navigation Mode readings

Current time
Magnetic north pointer

Recalling Navigation Mode Data

Deleting All Navigation Mode Data

While in the Navigation Mode, hold down A and C for about two seconds,
until the direction value changes to ---. This indicates all Navigation
Mode memory data is deleted.

• You cannot delete individual memory area contents.

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Area number

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1. In the Navigation Mode, use A to select the

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memory area where you want to store the
data. Each time you press A, the selected
memory area changes in the following
sequence.

Initial
Screen

Area 1

Area 2

Mode indicator

Area 4Area 5 Area 3

• Each memory area is identified by a number from 1 through 5. The
Initial Screen shows the current time without a memory number.

• Navigation Mode data is not stored in memory if you perform the
following steps while the Initial Screen is on the display.

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Direction value

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Temperature

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C

2. Place the watch on a flat surface or (if you
are wearing the watch), make sure that your
wrist is horizontal (in relation to the horizon).

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3. Press C to take a reading.

• After about one second, the current

temperature, direction pointers, and a

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C

direction value appear on the display.

• You can repeat steps 1 through 3 as many

times as you like.

4. Next, you can adjust the rotary direction bezel
so that the “N” or “L” mark is aligned with
the magnetic north pointer. This correctly
aligns all of the markings on the bezel.

• See “Temperature and Direction Reading

Precautions” and “Digital Compass
Precautions” for other important information
about taking direction and temperature
readings.

While in the Navigation Mode, use A to scroll
through the data in the following sequence.

Initial
Screen

Area 1

Area 4Area 5 Area 3

Area 2