Casio 2050 User manual

2050-1
Module No. 2050
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ABOUT THIS MANUAL
(MODE)
•Button operations are indicated using the
letters shown in the illustration.
•Eachsectionofthismanualprovidesyouwith
the information you need to perform
operations in each mode. Further details and
technical information can be found in the
“REFERENCE” section.
Warning!
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.
•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 “-” for the blood type and
“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.
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World Time Mode
Press M.
Identification Mode
Alarm Mode
Stopwatch Mode
▲
▲
▲
▲
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GENERAL GUIDE
ALM SIG
DIVETIME
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▲
▲
Dive Time
Measurement
Mode
Hold down M.
Timekeeping Mode
▲
•Press Mto change from mode to mode.
•While in any mode hold down Mfor one second, to enter the Dive Time
Measurement Mode.
•In any mode, press Bto illuminate the display.
TIMEKEEPING MODE
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.
•For details on how to view the log data, see
“Viewing Log Data”.
Calibrating the Seconds Count
1. IntheTimekeepingMode,holddownAuntil
the seconds digits start to flash.
2. Press Cto set the seconds count to OO.
•Pressing Cwhile 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
of00to29,the minutescountis unchanged.
3. Press Atoreturntothecurrenttimescreen.
Setting the Time and Date
1. IntheTimekeepingMode, hold down Auntil
the seconds digits start to flash.
2. Press Mto move the flashing in the
sequence shown below to select other
settings.
3. Whilehour, minutes, year,month, or dayisflashing,press Cto increase
the setting or Bto decrease it.
•When the 12/24-hour setting is selected, press Cto toggle between
12-hour (12H) and 24-hour (24H) timekeeping.
4. Press Ato 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.
•Thewatch’sbuilt-in full automaticcalendarautomatically 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.
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Day of week
Month – Day
Hour : Minutes
PM indicator
Seconds
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Hour
Seconds
Day
Minutes 12/24-Hour
Format
Year
Month
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DIVETIME
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DIVE TIME MEASUREMENT MODE
The Dive Time Measurement Mode lets you
measure the total time you spend underwater
while diving or snorkeling, and the amount of
timespentonthesurface (surface interval). The
watch also stores one set of diving time data
(total dive time and dive start time) into log
memory for later recall.
Warning!
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.
Current time
Mode indicator
Dive time
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.
•Checkto make sure thattimer operation is beingperformed 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.

2050-2
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DIVETIME
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Using the Dive Time Measurement Mode
1. Before diving/snorkeling, switch to the Dive
Time Measurement Mode by holding down
Mfor at least one second.
2. Tostart thedivetime measurement operation,
press C.
3. To stop the measurement, hold down Cfor
at least one second (until the watch emits a
long beep).
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 downAuntil the watch
emits a beep.
Notes
•The Pindicator 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 Cto stop
the dive time measurement operation in step 3, above. This timing is
performedinternally,andit is not indicatedonthe DiveTimeMeasurement
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.
Viewing Log Data 1. HolddownMfor at least one secondtoenter
the Timekeeping Mode from the Dive Time
Measurement Mode.
2. HolddownCto display theLogData screen.
The Log Data screen remains visible as long
as you hold down C. When you release C,
the normal Timekeeping Mode screen
returns.
•The surface interval continues to be timed
until you re-start dive time measurement
or until the surface interval reaches 24
hours.
Clearing the Log Data Memory
Log data in memory is automatically replaced
by the newest measurement. Use the following
operation if you want to manually clear the log
data memory.
1. While in the Timekeeping Mode, hold down
Cto display the Log Data screen.
2. WhileholdingdownC, press Ato clear the
log data memory.
•At this time, the display clears so that no
data is shown.
Dive time
(hours : minutes seconds)
Dive start time
Current time
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LOG ALM SIG
DIVETIME
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Dive start time
Surface interval
(hours : minutes)
Dive time
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B
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Mode indicator
GMT differential
Time in indicated city
(or site)
Current time
City code
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LOG ALM S IG
DIVETIME
WORLD TIME MODE
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.
•Wheneveryouchange the time setting for any
city (or site) in the World Time Mode, the
settings of all other cities are changed
accordingly.
•In the World Time Mode, the top line of the
displayscrollstoshowthecitycodeandGMT
differential.
•Acity code that corresponds to a diving site is
preceded by the symbol .
Viewing the Time in Another Zone
While in the World Time Mode, press Cto scroll forward through the city
codes (time zones).
•For full information on city codes, see the “CITY CODE TABLE”.
•Pressing Bwhile in the World Time Mode causes the current city code
and GMT differential to scroll across the display. It also turns on the
backlight.
Setting the World Time
1. In the World Time Mode, press Cto scroll
through the city code and find the one you
want.
2. HolddownAuntil the hour digitsoftheworld
time start to flash.
3. PressMtomove the flashing in the following
sequence.
Hour Minutes
4. While hour or minutes is flashing, press Cto increase the setting or B
to decrease it.
•When setting the world time using the 12-hour format, take care to set
the time correctly as a.m. (no indicator) or p.m. (Pindicator).
5. Press Ato return to the World Time screen.
Daylight Saving Time (DST)
Daylight Saving Time automatically advances the time setting by one hour
fromStandardTime.You can makeindividualDaylightSaving Timesettings
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
1. In the World Time Mode, press Cto display
the city code (time zone) whose standard
time/daylight saving time setting you want to
change.
2. Hold down Bto toggle between Daylight
Saving Time (DST displayed) and Standard
Time (DST not displayed).
•The DST indicator is on the display
wheneveryoudisplayacity code for which
daylight saving time is turned on.
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DST
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DST
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IDENTIFICATION MODE
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.
About Identification Mode Data
•The Identification Mode has five pre-
programmed data titles: NAME(name),
C CARD (SCUBAdiver certificate number),
EMERGENCY NO. (emergencycontact
number), BLOOD TYPE (blood type),
and PASSPORT (passport number).
•Except for BLOOD TYPE, you can input 16 characters (letters,
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.
Viewing Identification Mode Data
In the Identification Mode, each press of Cscrolls through the data in the
sequence shown below.
C CARD
PASSPORT BLOOD TYPE
User Data
New Data
Screen
NAME EMERGENCY NO.
•In the TextArea, 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.
1. In the Identification Mode, display the title of
the data you want to input.
•Display the New Data screen when you
want to create your own title.
•The new data screen is the one that
contains no text or numbers.
2. Hold down Auntil the cursor appears in the
text area.
•If you do not want to input text into the text area, hold down Mfor at
least one second to move the cursor to the number area and jump to
step 7.
Text area
Mode indicator
Title
Number area
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Cursor

2050-3
3. Use Band Cto change the character at the cursor position in the text
area. The character changes in the following sequence.
-
)
Press C.Press B.
(space)
0 to 9
A to Z
( / .
4. Whenthecharacteryouwant is at the cursor position, pressMtomove
the cursor to the right.
5. Repeat the steps 3 and 4 until your text is complete.
6. After you input text, use Mto move the cursor to the number area.
•Holding down Mfor at least one second causes the cursor to jump
between the text area and number area.
•The text area in the Identification Mode can hold up to 16 characters.
When the cursor is located at the 16th space of the text area, moving the
cursor to the right causes it to jump down to the first digit in the number
area.Whenthecursoris at the 10th digit of the number area, moving it to
the right causes it jump back up to the first character of the text area.
7. Use Band Cto change the character (hyphen, number, or space) at
the cursor position in the number area. The character changes in the
following sequence.
x
(space)
0 to 9
Press C.
Press B.
8. Whenthecharacteryouwant is at the cursor position, pressMtomove
the cursor to the right.
9. Repeat steps 7 and 8 until you complete number input.
10.Press Ato store your data and return to the Identification Mode data
screen (without the cursor).
Inputting Your Blood Type
1. In the Identification Mode, display the
BLOOD TYPE title.
2. Hold down AuntilthebloodtypeABO starts
to flash.
3. UseBandCtoscrollthrough the available
blood type in the following sequence.
4. Press Mto advance to specification of the Rh factor.
•At this time the current Rh factor (xor *) will flash on the display.
5. Press Cto select either x(negative) or *(positive).
6. PressAtostoreyour data and return to theBLOOD TYPE screen.
Editing Identification Mode Data (except Blood Type Data)
1. In the Identification Mode, scroll through the data and display the one
you want to edit.
2. Hold down Auntil the cursor appears in the text area.
3. Use Mto move the cursor to the character you want to change.
4. Use Band Cto change the character.
•For details on inputting characters, see “Inputting Text and Numbers”
(step 3 for text input and 7 for number).
5. After making the changes that you want, press Ato store them and
return to the Identification Mode data screen.
Deleting Identification Mode Data (except Blood Type Data)
1. In the Identification Mode, scroll through the data and display the one
you want to delete.
2. Hold down Auntil the cursor appears in the text area.
3. Press Band Cat the same time to clear the data.
•At this time the cursor appears in the text area, ready for input.
4. Input data or press Ato return to the Identification Mode data screen.
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Blood type ABO Rh factor
A B- O AB
Press C.
Press B.
3. While hour or minutes is flashing, press Cto increase the setting or B
to decrease it.
•When setting the alarm time using the 12-hour format, take care to
set the time correctly as a.m. (no indicator) or p.m. (Pindicator).
4. Press Ato return to the alarm display screen.
Daily Alarm Operation
The alarm sounds at the preset time each day for about 20 seconds, or
until you stop it by pressing any button.
To test the alarm
Hold down Cto sound the alarm.
Turning the Daily Alarm and Hourly Time Signal on and off
In the Alarm Mode, press Cto cycle through the on and off settings a
shown below.
[Alarm On Indicator / Hourly Time Signal On Indicator]
ALARM MODE
You can set a Daily Alarm that sounds at the
same time each day, while it is turned on. You
can also turn on an Hourly Time Signal that
causes the watch to beep twice every hour on
the hour.
Setting the Alarm Time
1. In the Alarm Mode, hold down Auntil the
hour digits of the alarm time start to flash.
•This operation automatically turns on the
Daily Alarm.
2. PressMtomove the flashing in the following
sequence.
Hour Minutes
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P
Mode indicator
Current time
Alarm on indicator
Hour : Minutes
Hourly time signal
on indicator
Alarm On
Signal On Alarm Off Signal Off Alarm On Signal Off Alarm Off Signal On
ALM SIG SIGALM
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STOPWATCH MODE
TheStopwatchModeletsyou measure elapsed
time, split times, and two finishes. The range of
the stopwatch is 23 hours, 59 minutes, 59.99
seconds.
1/100 second
Hours : Minutes
Mode indicator
Seconds
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AUTO
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AUTO
BACKLIGHT
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
switchautomaticallyturns on the backlight when
you angle the watch towards your face.
•The auto light switch must be turned on
(indicatedbythe auto light switch onindicator)
for it to operate.
Turning on the Backlight manually
In any mode, press Bto illuminate the display for about two seconds.
•The above operation turns on the backlight regardless of the current
auto light switch setting.
Auto light switch
on indicator
First runner
finishes. Second runner finishes.
Record time of first
runner.
Record time of
second runner.
(a) Elapsed Time
CC C C A
Start Stop Re-start Stop Clear
(b) Split Time
CA A C A
Start Split Split release Stop Clear
(c) Two Finishes
CA C A A
Start Split Stop Split release Clear
J J J J
J J J J
J J J J
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
tiltingittowardsyoumore than 40 degrees causes the backlight to light.
Parallel to
ground
More
than
40
°

2050-4
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.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down Bfor two seconds to turn the auto
light switch on (
AUTO
displayed) and off (
AUTO
not displayed).
•In order to protect against running down the battery, the auto light switch
is automatically turned off approximately four hours after you turn it on.
Repeat the above procedure to turn the auto light switch back on if you
want.
•Theautolightswitchonindicator(
AUTO
)isonthedisplayinallmodes
while the auto light switch is turned on.
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REFERENCE
This section contains more detailed and technical information about watch
operation.It also containsimportantprecautions and notesaboutthe various
features and functions of this watch.
Graphic Area and Text Area
•The graphic area shows the passage of
minutes in the Timekeeping, Dive Time
Measurement, World Time, and Stopwatch
Modes, and the Log Data screen.A segment
appears in the graphic area each time five
minutes pass.
•The text area can show up to four characters,
so longer text scrolls continually from right to
left.
Graphic area
Text area
•In the Timekeeping Mode, an animated figure appears in the text area at
00 and 30 seconds, and whenever the backlight is turned on.
Auto Return Feature
•After you perform an operation in any mode (except for the backlight
operation), pressing Mreturns to the Timekeeping Mode.
•If you leave a screen with flashing digits or cursor on the display for two
orthree minutes withoutperformingany operation, thewatchautomatically
savesanything you have inputupto that point andexitsthe setting screen.
Data and Setting Scrolling
The Band Cbuttons are used in various modes and screens 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.
12-hour/24-hour Timekeeping Formats
The12-hour/24-hour timekeepingformatyou selectin theTimekeepingMode
isalso appliedinthe DiveTimeMeasurement,WorldTime,andAlarmModes.
•With the 12-hour format, the P(PM) indicator appears to the left of the
hour digits for times in the range of noon to 11:59 pm. No indicator is
shown from midnight to 11:59 am.
•With the 24-hour format, times are indicated in the range of 00:00 to
23:59, with 24 indicator.
World Time Mode
•The GMT differential is the time difference of the time zone where the
city is located from Greenwich Mean Time.
•The seconds count of the World Time is synchronized with the seconds
count of the Timekeeping Mode.
•GMT differential is calculated by this watch based on Universal Time
Coordinated (UTC) data.
•The time zone that is displayed when you leave the World Time Mode
will still be displayed when you enter the World Time Mode again.
Backlight Precautions
•The electro-luminescent (EL) panel loses illuminating power after very
long use.
•The illumination provided by the backlight may be hard to see when
viewed under direct sunlight.
•Thewatchwillemitanaudiblesoundwheneverthe display is illuminated.
It does not indicate malfunction of the watch.
•The backlight automatically turns off whenever an alarm sounds.
More than 15
degrees too high
Parallel to ground More than 15
degrees too low
Auto light switch precautions
•Avoid wearing the watch on the inside of your wrist. Doing so causes the
autolight switch to operate when it is not needed, which shortens battery
life. If you want to wear the watch on the inside of your wrist, turn off the
auto light switch feature.
•Thebacklight may not lightifthe face ofthewatch is more than15degrees
off the parallel as shown below. Make sure that the back of your hand is
parallel to the ground.
•The backlight turns off in about two seconds, even if you keep the
watch pointed towards your face.
•Static electricity or magnetic force can interfere with proper operation of
the auto light switch. If the backlight does not light, try moving the watch
back to the starting position (parallel with the ground) and then tilt it back
toward you again. If this does not work, drop your arm all the way down
so it hangs at your side, and then bring it back up again.
•Undercertain conditions the backlightmaynot light untilaboutone second
afteryouturn the face ofthewatchtowards you.Thisdoes not necessarily
indicate malfunction of the backlight.
About the Battery
Whenever battery power is below a certain level, the flashing indicator
appears, display characters appear dim, the backlight may fail to light, the
alarm may fail to sound and the auto light switch does not operate. For safety
reasons, the watch will not enter the Dive Time Measurement Mode when
battery power is low. This is indicated by the message BATT appearing
when you hold down Mto enter the Dive Time Measurement Mode. Using
the watch while the battery is low can result in abnormal operation.
Even when the battery power is not low, backlight, alarm, and other
sustained high-power consumption operations can cause the flashing
indicator to appear temporarily. In this case, the indicator should
disappear from the display in about 10 minutes. However, note that the
above listed functions, which are normally disabled when battery power is
low, are also disabled while the indicator is temporarily flashing on the
display.
CITY CODE TABLE
City Code
LON
PAR
IST
RED SEA
JED
THR
DXB
MAURITIUS
KBL
KHI
MALDIVES
DEL
DAC
RGN
BKK
HKG
TYO
ADL
SYD
GBR
GUAM
NOU
WLG
PPG
HAWAII
TAHITI
ANC
LAX
DEN
CHI
GALAPAGOS
NYC
CAYMAN
CCS
RIO
City
LONDON
PARIS
ISTANBUL
RED SEA
JEDDAH
TEHRAN
DUBAI
MAURITIUS
KABUL
KARACHI
MALDIVES
DELHI
DHAKA
YANGON
BANGKOK
HONG KONG
TOKYO
ADELAIDE
SYDNEY
GREAT BARRIER REEF
GUAM
NOUMEA
WELLINGTON
PAGO PAGO
HAWAII
TAHITI
ANCHORAGE
LOS ANGELES
DENVER
CHICAGO
GALAPAGOS
NEW YORK
CAYMAN
CARACAS
RIO DE JANEIRO
GMT
Differential
+00
+01
+02
+03
+3.5
+04
+4.5
+05
+5.5
+06
+6.5
+07
+08
+09
+9.5
+10
+11
+12
–11
–10
–09
–08
–07
–06
–05
–04
–03
Other major cities in same time zone
DUBLIN, LISBON, CASABLANCA,
DAKAR, ABIDJAN
MILAN, ROME, MADRID,AMSTERDAM,
ALGIERS, HAMBURG, FRANKFURT,
VIENNA, STOCKHOLM, BERLIN
CAIRO, JERUSALEM,ATHENS, HELSINKI,
BEIRUT, DAMASCUS, CAPE TOWN
KUWAIT, RIYADH, ADEN, ADDIS ABABA,
NAIROBI
SHIRAZ
ABU DHABI, MUSCAT
MUMBAI, CALCUTTA
COLOMBO
JAKARTA, PHNOM PENH, HANOI,
VIENTIANE
SINGAPORE, KUALA LUMPUR, BEIJING,
TAIPEI, MANILA, PERTH, ULAANBAATAR
SEOUL, PYONGYANG
DARWIN
MELBOURNE, RABAUL
PORT VILA
CHRISTCHURCH, NADI, NAURU ISLAND
HONOLULU, PAPEETE
NOME
SAN FRANCISCO, LAS VEGAS,
VANCOUVER, SEATTLE, DAWSON CITY
EL PASO, EDMONTON
HOUSTON, DALLAS/FORT WORTH, NEW
ORLEANS, MEXICO CITY, WINNIPEG
MONTREAL, DETROIT, MIAMI, BOSTON,
PANAMA CITY, HAVANA, LIMA, BOGOTA
LA PAZ, SANTIAGO, PORT OF SPAIN
SAO PAULO, BUENOS AIRES, BRASILIA,
MONTEVIDEO
* Based on data as of June 1998.