Casio 3377 Operation Manual

MO0402-EA

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
when necessary.
The pressure sensor of this watch provides depth gauge capabilities when skin diving
or snorkeling.
Warning!
• The measurement functions built into this watch are not intended for taking
measurements that require professional or industrial precision. Readings
produced by this watch should be considered as reasonable representations
only.
• This watch is intended for use up to skin diving and snorkeling. Never use this
watch while scuba diving.
• Be sure to obtain adequate safety instruction and training before engaging in
skin diving or snorkeling.
• 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.
About This Manual
Crown

General Guide

• The hour hand, minute hand, and 24-hour (middle) dial indicate the current time in
all modes. The information indicated by the depth/chronograph hand and the other
two dials depends on the current mode. For details, see the sections of this manual
that cover each of the modes.
Depth/chronograph hand
Hour hand
Minute hand
• The pressure sensor is located on the back of the watch.
• Use B to cycle between modes as shown below.
Diving Mode
Hold down B
for about two
seconds.
L
• When you change to another mode, the depth/chronograph hand rotates at high
speed a number of times and finally stops at the 12 o'clock position. Make sure you
wait until the depth/chronograph hand stops before you perform any other operation
in the mode you select.

Timekeeping

Depth/chronograph hand
Hour
Minutes
Date
Crown
24-hour dial
Seconds
Crown
Unlocked
Locked
• Never unlock the crown while the watch, especially the area around the crown, is
wet. Doing so creates the risk of water getting inside the watch, which can lead to
malfunction.
• Never press A or B while the crown is unlocked. Doing so can cause the watch to
enter another mode and result in misalignment of hands.
• Make sure you lock the crown after you finish setting the current time and date.
• Make sure that the hand of the middle (24-hour) dial is pointing to the correct hour of
the day when setting the time. An incorrect middle dial setting can cause the date to
change at noon instead of midnight.
• The date indicator is based on a 31-day month. Because of this, you will need to
change the date setting at the end of February, April, June, September, and
November to adjust for the shorter month.
• Avoid changing the date setting while the current time is between 9:00 p.m. and
1:00 a.m. If you change the date setting during this period, the date setting may not
change properly to the next day at midnight.
Operation Guide 3377
• Button operations are indicated using the letters 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 technical information can be
found in the "Reference" section.
Top dial
Middle dial
Date
Crown
Bottom dial
Timekeeping Mode
Chronograph Mode
Top dial hand
Press B.
Hold down B for
about two seconds.
Use the Timekeeping Mode to set the current time and
date.
• All of the operations in this section are performed in the
Timekeeping Mode.
• In the Timekeeping Mode, the current time seconds
count is indicated by the bottom dial. The depth/
chronograph hand remains stopped at the 12 o'clock
position.
Read this before setting current time and date!
• Make sure that the top dial hand is pointing at TM
(Timekeeping Mode) before setting the time and date.
• This watch has a screw lock crown. Do not pull on the
crown with undue force while it is locked.
To set the time
1. Rotate the crown towards you to unlock it.
2. Pull out the crown to the second click.
• At this time, the hand of the bottom dial will move to
the 12 o'clock position and stop there.
3. Rotate the crown to set the correct time.
• Note that the hand of the middle (24-hour) dial moves
in coordination with the hour and minute hands. When
adjusting the time, keep an eye on this dial to make
sure that its hand indicates the correct hour of the
day.
4. When the setting is the way you want, re-lock the crown
by pressing it in as you rotate it away from you.
Unlock
First click
Second click
(Sets the time.)
To set the date
1. Rotate the crown towards you to unlock it.
2. Pull the crown out to the first click.
3. Rotate the crown towards you to set the date.
4. When the setting is the way you want, re-lock the crown
by pressing it in as you rotate it away from you.
Unlock
First click
(Sets the date.)

Diving

The pressure sensor of the watch can be used to perform
Depth underwater depth measurement while skin diving or
snorkeling.
Depth dial
The watch maintains a single maximum depth reading,
(Unit: 1 meter)
which is the maximum depth measured during your last
dive.
• Depth measurement starts automatically whenever you
enter the water while the watch is in the Diving Mode.
• In the Diving Mode, the depth/chronograph hand points
to the value of the depth dial around the periphery of the
face that corresponds to the current depth reading.
Important!
• Never use this watch to measure depth while scuba
diving.
Seconds • Never perform any button operations or rotate the
crown while underwater.
• Relatively accurate depth measurement is guaranteed within the temperature range
of 10°C to 40°C. Do not use this watch in temperatures outside this temperature
range.
• If you do not submerge past one meter for about 30 minutes while the depth/
chronograph hand indicates zero (12 o'clock) in the Diving Mode, the watch will
automatically switch to the Timekeeping Mode.
Be sure to read "Diving Mode Precautions" before actually using the watch while
skin diving or snorkeling.
What is "a dive" ?
A dive starts when you pass a depth of one meter while the watch is in the Diving
Mode. The dive ends when you are on the surface and exit the Diving Mode. A dive
does not end if you surface but do not exit the Diving Mode.
Enter the Diving Mode.
Depth = 1.0 m
Start of dive
Maximum depth
• Remember that the term "dive" as used in this manual refers to skin diving or
snorkeling only.
• When you enter the water while the watch is in the Diving Mode, the watch will start
depth measurement automatically when the sensor detects that your depth exceeds
one meter. Depth measurement stops automatically whenever your depth becomes
less than one meter.
• When there is large difference between air temperature and water temperature,
immerse the watch in the water for two or three minutes before starting a Diving
Mode measurement.
• After you enter the Diving Mode, the watch automatically takes a reference pressure
reading and sets the result as 0 meters. This means that before starting a dive, you
should enter the Diving Mode while at the water's surface, never while the watch is
submerged.
Exit the Diving Mode.
End of dive
1