Casio 2050 Owner's Manual

Module No. 2050	2050-1
ABOUT THIS MANUAL

A

P

MALM SIG

(MODE)

∙ Button operations are indicated using the

Bletters shown in the illustration.

∙Each section of this manual provides you with the information you need to perform

operations in each mode. Further details and

Ctechnical 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.

GENERAL GUIDE

∙ Press M to change from mode to mode.	World Time Mode	Identification Mode
∙ While in any mode hold down Mfor one second, to enter the Dive Time

Measurement Mode.
∙ In any mode, press B to illuminate the display.							P		▲
							P
Dive Time						▲	ALM SIG		ALM SIG
Measurement			Timekeeping Mode
Mode						.	Stopwatch Mode		▲
									Alarm Mode
						M
	Hold down M.		A		B	Press
P	▲	▲
			P			▲		▲	P
									P
DIVE TIME ALM SIG			M	ALM SIG	C
							ALM SIG		ALM SIG

TIMEKEEPING MODE

Month – Day

Day of week

A B

P

M

ALM SIG C

Hour : Minutes

Seconds

PM indicator

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.In the Timekeeping Mode, hold down Auntil 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 Ato return to the current time screen.

Setting the Time and Date

		1.	In the Timekeeping Mode, hold down Auntil
A		B	the seconds digits start to flash.
		2.	Press M to move the flashing in the
	P		sequence shown below to select other
M	ALM SIG	C	settings.
	Seconds	Hour		Minutes	12/24-Hour
					Format
	Day		Month		Year

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

∙When the 12/24-hour setting is selected, press Cto toggle between 12-hour (12H) and 24-hour (24H) timekeeping.

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.

DIVE TIME MEASUREMENT MODE

Current time

Mode indicator

A B

P

M DIVE TIME ALM SIG C

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 (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.

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.

2050-2

Using the Dive Time Measurement Mode

Dive start time

	Current time
A	B
	P
M	DIVE TIME ALM SIG C

Dive time

(hours : minutes seconds)

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

2.To start the dive time 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 down Auntil the watch emits a beep.

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 Cto 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.

Viewing Log Data

Dive start time

Surface interval (hours : minutes)

A	B
	P
M	LOG DIVE TIME ALM SIG C
	Dive time

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

2.Hold down Cto display the Log Data 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

A

M LOG

DIVE TIME ALM SIG

Log data in memory is automatically replaced

Bby the newest measurement. Use the following operation if you want to manually clear the log data memory.

C1. While in the Timekeeping Mode, hold down Cto display the Log Data screen.

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

∙At this time, the display clears so that no data is shown.

WORLD TIME MODE

GMT differential

Mode indicator

City code

A

P	B
P
M	ALM SIG C
	Current time

Time in indicated city (or site)

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.

∙Whenever you change 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 display scrolls to show the city code and GMT differential.

∙A city 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 C to scroll
A	B	through the city code and find the one you
P	2.	want.
P		Hold down Auntil the hour digits of the world
M	ALM SIG C	time start to flash.
	3.	Press Mto move 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. (P indicator).

5.Press Ato return to the World Time screen.

Daylight Saving Time (DST)

Daylight Saving Time automatically advances the time setting by one hour from Standard Time. You 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

			1. In the World Time Mode, press Cto display
A		B	the city code (time zone) whose standard
			time/daylight saving time setting you want to
		P	change.
		DST
	P		2. Hold down B to toggle between Daylight
M		ALM SIG C	Saving Time (DST displayed) and Standard
			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 B

M

ALM SIG C

Number area

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 preprogrammed data titles: NAME (name), C CARD(SCUBA diver certificate number), EMERGENCY NO.(emergency contact 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.

NAME C CARD EMERGENCY NO.

	New Data		User Data		PASSPORT		BLOOD TYPE
	Screen

∙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	1.	In the Identification Mode, display the title of
			the data you want to input.
A		B	∙ Display the New Data screen when you
			want to create your own title.
			∙ The new data screen is the one that
M	ALM SIG	C	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.