Casio 2050 Owner's Manual

Module No. 2050

ABOUT THIS MANUAL

• Button operations are indicated using the

A

P

M

ALM SIG

(MODE)

Note the following important points concerning Identification Mode data
stored in the memory of this watch.

• SCUBA diver certificate number, passport number, and emergency

contact number data stored in the memory of this watch can be
misused whenever the watch is in the hands of another party.

• To protect against the misuse of SCUBA diver certificate number,

passport number, and emergency contact number data, input them
in coded form that cannot be understood by others.

letters shown in the illustration.

B

• Each section of this manual provides you with
the information you need to perform
operations in each mode. Further details and

C

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

Warning!

GENERAL GUIDE

2050-1

• Make sure you correctly input your name and blood type data. Once

you input your data, take care that the watch is not borrowed by
another person. Otherwise, emergency medical personnel may
assume that your data applies to the person who borrowed the
watch.

• The default blood type screen setting when you first purchase the

watch or after you change the battery is “
“Rh *” for the Rh factor. To avoid problems caused by display of
the wrong blood type, we recommend that you input your correct
blood type data as soon as possible after purchasing the watch
and after having the battery replaced.

• CASIO COMPUTER CO., LTD. shall not be held liable to you or any

third party for any losses or damages suffered through the misuse
of data stored in the memory of this watch.

-” for the blood type and

• Press M to change from mode to mode.

• While in any mode hold down M for one second, to enter the Dive Time

Measurement Mode.

• In any mode, press B to illuminate the display.

Dive Time

Measurement

Mode

P

DIVETIME

ALM SIG

Hold down M.

▲

Timekeeping Mode

A

▲

M

Press M.

B

P

ALM SIG

▲

C

TIMEKEEPING MODE

Month – Day

Day of week

A

P

M

Hour : Minutes

PM indicator

ALM SIG

Seconds

Setting the Time and Date

A

P

M

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

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

4. Press A to return to the current time screen.

Notes

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

date (year, month, and day) settings.

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

• 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 battery.

ALM SIG

Seconds

Day

12-hour (

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

In addition to normal timekeeping, use the
Timekeeping Mode to set the current time and
date. You can also view the Dive Time
Measurement Mode log data.

B

• For details on how to view the log data, see
“Viewing Log Data”.

Calibrating the Seconds Count

C

1. In the Timekeeping Mode, hold down A until

the seconds digits start to flash.

2. Press C to set the seconds count to OO.

• Pressing C while the seconds count is in
the range of 30 to 59 resets the seconds to

OO and add 1 to the minutes. In the range

of 00 to 29, the minutes count is unchanged.

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

1. In the Timekeeping Mode, hold down A until

B

the seconds digits start to flash.

2. Press M to move the flashing in the
sequence shown below to select other
settings.

C

Hour

Minutes

Month

12/24-Hour
Format

Year

World Time Mode

P

P

▲

ALM SIG

Stopwatch Mode

ALM SIG

▲

Identification Mode

▲

ALM SIG

▲

Alarm Mode

P

P

ALM SIG

DIVE TIME MEASUREMENT MODE

Current time

Mode indicator

A

P

DIVETIME

M

Before Diving/Snorkeling

• Be sure to check if the battery power is low (check for low light

intensity, a dim display, or the flashing indicator). If it is, do not
use the watch for diving/snorkeling.

• Make sure that the watch is set to the correct time.

• Check the glass, case and band for cracks or chips.

• Make sure that the band is fastened securely around your wrist.

While Diving/Snorkeling

• Always use the “buddy system” when diving – never dive alone.

• Check to make sure that timer operation is being performed properly.

• Take care when diving/snorkeling near rocks or coral to avoid

scratching the watch.

After Diving/Snorkeling
To avoid corrosion, rinse your watch thoroughly with fresh water to
remove salt water, dirt, etc. When possible, soak the watch in fresh
water overnight to make sure that all salt is removed.

ALM SIG

Dive time

The Dive Time Measurement Mode lets you
measure the total time you spend underwater
while diving or snorkeling, and the amount of
time spent on the surface (surface interval). The
watch also stores one set of diving time data

B

(total dive time and dive start time) into log
memory for later recall.

Warning!

C

For your own safety, never operate the
buttons of the watch while underwater or
while on the water’s surface. Perform button
operations in a safe place after leaving the
water.

2050-2

C CARD

PASSPORT BLOOD TYPE

User Data

New Data

Screen

NAME

EMERGENCY NO.

Using the Dive Time Measurement Mode

Dive start time

Current time

A

P

DIVETIME

M

Dive time
(hours : minutes seconds)

Notes

• The P indicator appears in the dive start time (center) display to indicate
a p.m. time, but not in the current time (top) display.

• Timing of the surface interval starts whenever you hold down C to stop
the dive time measurement operation in step 3, above. This timing is
performed internally, and it is not indicated on the Dive Time Measurement
Mode screen. For details on how to view surface interval data, see
“Viewing Log Data”.

• Do not recall log data while a dive time measurement is stopped
and you plan to re-start it. If you do, the dive time to that point will be

stored into memory and the data will be cleared when you exit the Dive
Time Measurement Mode.

ALM SIG

1. Before diving/snorkeling, switch to the Dive
Time Measurement Mode by holding down
M for at least one second.

2. To start the dive time measurement operation,
press C.

B

3. To stop the measurement, hold down C for
at least one second (until the watch emits a
long beep).

C

4. To re-start timing from the dive time shown
on the display, press C.

• You can repeat steps 3 and 4 as many

times as you like.

5. To clear the Dive Time Measurement Mode,
stop the measurement operation (step 3,
above) and then hold down A until the watch
emits a beep.

Viewing Log Data

1. Hold down M for at least one second to enter
the Timekeeping Mode from the Dive Time
Measurement Mode.

2. Hold down C to display the Log Data screen.
The Log Data screen remains visible as long
as you hold down C. When you release C,

B

the normal Timekeeping Mode screen
returns.

• The surface interval continues to be timed

C

until you re-start dive time measurement
or until the surface interval reaches 24
hours.

Surface interval
(hours : minutes)

A

LOG ALM SIG

M

Dive time

Dive start time

P

DIVETIME

Clearing the Log Data Memory

Log data in memory is automatically replaced

A

M

DIVETIME

LOG ALM SIG

by the newest measurement. Use the following

B

operation if you want to manually clear the log
data memory.

1. While in the Timekeeping Mode, hold down

C

C to display the Log Data screen.

2. While holding down C, press A to clear the
log data memory.

• At this time, the display clears so that no

data is shown.

WORLD TIME MODE

Mode indicator

GMT differential

City code

A

P

P

M

Time in indicated city
(or site)

ALM SIG

Current time

Viewing the Time in Another Zone

While in the World Time Mode, press C to scroll forward through the city
codes (time zones).

• For full information on city codes, see the “CITY CODE TABLE”.

• Pressing B while in the World Time Mode causes the current city code

and GMT differential to scroll across the display. It also turns on the
backlight.

The World Time Mode shows the current time
in 26 cities and 9 diving sites (27 time zones)
around the world.

• The time settings of the Timekeeping Mode

and the World Time Mode are independent
from each other, so you must make separate
settings for each.

B

• Whenever you change the time setting for any

city (or site) in the World Time Mode, the

C

settings of all other cities are changed
accordingly.

• In the World Time Mode, the top line of the

display scrolls to show the city code and GMT
differential.

• A city code that corresponds to a diving site is

preceded by the symbol .

Setting the World Time

A

P

P

M

4. While hour or minutes is flashing, press C to increase the setting or B
to decrease it.

• When setting the world time using the 12-hour format, take care to set

5. Press A to return to the World Time screen.

ALM SIG

the time correctly as a.m. (no indicator) or p.m. (P indicator).

1. In the World Time Mode, press C to scroll

B

through the city code and find the one you
want.

2. Hold down A until the hour digits of the world
time start to flash.

C

3. Press M to move the flashing in the following
sequence.

Hour Minutes

Daylight Saving Time (DST)

Daylight Saving Time automatically advances the time setting by one hour
from Standard Time. Y ou can make individual Daylight Saving Time settings
for each city code (time zone). Remember that not all countries or even
local areas use Daylight Saving Time.

To switch between Standard Time and Daylight Saving Time

A

P

DST

DST

P

M

ALM SIG

1. In the World Time Mode, press C to display
the city code (time zone) whose standard

B

time/daylight saving time setting you want to
change.

2. Hold down B to toggle between Daylight
Saving Time (DST displayed) and Standard

C

Time (DST not displayed).

• The DST indicator is on the display

whenever you display a city code for which
daylight saving time is turned on.

IDENTIFICATION MODE

Mode indicator

Title

Text area

A

M

• Except for
numbers, symbols) in the text area and 10 digits in the number area.

• In the case of BLOOD TYPE, you can input a blood type (ABO)
and Rh factor.

ALM SIG

Number area

BLOOD TYPE, you can input 16 characters (letters,

Viewing Identification Mode Data

In the Identification Mode, each press of C scrolls through the data in the
sequence shown below.

• In the Text Area, the title alternates with the input text.

• No title is displayed in the text area of the new data screen, so you can

input your own title.

• User Data appears only if you have created your own title and input
data. This item is skipped if there is no user data in memory.

• The New Data screen does not appear if there is already data input for
all five of the user data entries.

Inputting Text and Numbers

The following procedure is the same for NAME, C CARD,

EMERGENCY NO., and PASSPORT, and your original data.

Cursor

A

M

• If you do not want to input text into the text area, hold down M for at

ALM SIG

least one second to move the cursor to the number area and jump to
step 7.

With the Identification (ID) Mode, you can store
your name, SCUBA diver certificate number,
emergency contact number, passport number,
and blood type. There is also memory for five
general memo text records.

B

About Identification Mode Data

• The Identification Mode has five pre­programmed data titles: NAME (name),

C CARD (SCUBA diver certificate number),

C

EMERGENCY NO. (emergency contact

number), BLOOD TYPE (blood type),
and PASSPORT (passport number).

1. In the Identification Mode, display the title of

the data you want to input.

B

• Display the New Data screen when you
want to create your own title.

• The new data screen is the one that

C

contains no text or numbers.

2. Hold down A until the cursor appears in the
text area.