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Operation Guide 3185

MO1101-EA

E-1

Getting Acquainted

Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to read this manual carefully.

Warning!

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.

The Moon phase indicator and tide graph data that appear on the display of this
watch are not intended for navigation purposes. Always use proper instruments
and resources to obtain data for navigation purposes.

This watch is not a precision instrument for calculating low tide and high tide
times. The tide graph of this watch is intended to provide a reasonable
approximation of tidal movements only.

Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any
damage or loss suffered by you or any third party arising through the use of this
product or its malfunction.

E-2

Keep the watch exposed to bright light

The electricity generated by the solar cell of the watch is
stored by a rechargeable battery. Leaving or using the
watch where it is not exposed to light causes the battery
to run down. Make sure the watch is exposed to light as
much as possible.

When you are not wearing the watch on your wrist,
position the face so it is pointed at a source of bright
light.

You should try to keep the watch outside of your sleeve
as much as possible. Charging is reduced significantly if
the face is covered only partially.

ll

l

l

l

l

l

l

l

l

l

Bright Light

Solar cell

E-3

All
functions
enabled

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Charge

Rechargeable battery

Bright Light

Electrical 
energy

Solar cell
(Converts light to 
electrical power.)

Some or all 
functions
disabled

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Dis-

charge

Battery charges in the light.

Battery discharges in the dark.

The watch continues to operate, even when it is not exposed to light. Leaving the
watch in the dark can cause the battery to run down, which will result in some watch
functions to be disabled. If the battery goes dead, you will have to re-configure watch
settings after recharging. To ensure normal watch operation, be sure to keep it
exposed to light as much as possible.

E-4

The actual level at which some functions are disabled depends on the watch model.

Frequent display illumination can run down the battery quickly and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.

Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately about 8 hours exposure to indoor fluorescent lighting

Be sure to read “Power Supply” (page E-52) for important information you
need to know when exposing the watch to bright light.

If the display of the watch is blank...

If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.

See “Power Saving Function” (page E-66) for more information.

E-5

About This  Manual

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.

E-6

Contents

General Guide ....................................................................................................... E-10
Timekeeping .......................................................................................................... E-12
Using the Diving Mode ......................................................................................... E-18
Tide/Moon Data ..................................................................................................... E-28
World Time ............................................................................................................. E-36
Alarms .................................................................................................................... E-38
Stopwatch .............................................................................................................. E-43
Countdown Timer .................................................................................................. E-45
Illumination ............................................................................................................ E-48
Power Supply ........................................................................................................ E-52
Reference .............................................................................................................. E-60
Specifications ....................................................................................................... E-73

E-7

Procedure Lookup

The following is a handy reference list of all the operational procedures contained in
this manual.

To set the time and date ....................................................................................... E-13

To change the Daylight Saving Time (summer time) setting ............................ E-17

To start dive time measurement .......................................................................... E-21

To stop dive time measurement .......................................................................... E-21

To reset a dive time measurement and start interval measurement ................ E-22

To reset a dive time measurement and exit the Diving Mode ........................... E-22

To view diving log records ................................................................................... E-25

To delete diving log records ................................................................................ E-27

To adjust the high tide time ................................................................................. E-33

E-8

To reverse the displayed Moon phase ................................................................ E-35

To view the time in another city ........................................................................... E-37

To toggle a city code time between Standard Time

and Daylight Saving Time ............................................................................... E-37

To set an alarm time ............................................................................................. E-39

To test the alarm ................................................................................................... E-40

To turn an alarm on and off .................................................................................. E-41

To turn the Hourly Time Signal on and off .......................................................... E-42

To measure times with the stopwatch ................................................................ E-44

To configure the countdown timer ...................................................................... E-46

To use the countdown timer ................................................................................ E-47

To illuminate the display manually ...................................................................... E-48

E-9

To specify the illumination duration ................................................................... E-49

To turn the auto light switch on and off .............................................................. E-51

To turn the button operation tone on and off ..................................................... E-65

To recover from the sleep state ........................................................................... E-67

To turn Power Saving on and off ......................................................................... E-68

Summary of Contents for 3185

Page 1: ... actual level at which some functions are disabled depends on the watch model Frequent display illumination can run down the battery quickly and require charging The following guidelines give an idea of the charging time required to recover from a single illumination operation Approximately 5 minutes exposure to bright sunlight coming in through a window Approximately about 8 hours exposure to ind...

Page 2: ...e hour and minutes Change the year month or day Toggle the button operation tone between on and off Toggle the illumination duration between approximately 1 5 seconds and approximately 3 seconds Toggle between Power Saving on and off Press D Press D Use D and B Use D and B Press D Press D Press D E 16 5 Press A to exit the setting screen The day of the week is displayed automatically in accordance...

Page 3: ...l prior to the dive if there was one There is enough memory for 10 diving log records If there are already 10 diving log records in memory when you perform a reset operation the oldest record currently in memory is deleted automatically to make room for the new record E 25 To view diving log records 1 In the Timekeeping Mode press C to enter the Diving Log Recall Mode This displays the newest reco...

Page 4: ...Moon phase 1 In the Tide Moon Data Mode hold down A until the hour digits start to flash 2 Press C twice This will cause the Moon phase indicator to flash This is the indicator switching screen 3 Press D to toggle the Moon phase indicator between the southerly view indicated by and northerly view indicated by Northerly view Moon is north of you Southerly view Moon is south of you 4 When the Moon p...

Page 5: ...E 45 Countdown Timer You can set the countdown timer within a range of one minute to 24 hours An alarm sounds when the countdown reaches zero All of the operations in this section are performed in the Countdown Timer Mode which you enter by pressing C page E 11 Countdown End Beeper The countdown end beeper lets you know when the countdown reaches zero The beeper stops after about 10 seconds or whe...

Page 6: ...Charge Soon Alert Function Status All functions enabled All functions enabled Illumination beeper and Diving Mode access disabled Except for timekeeping and the CHG charge indicator all functions and display indicators disabled All functions disabled Battery Power Indicator and Recover Indicator The battery power indicator on the display shows you the current status of the rechargeable battery s p...

Page 7: ...e setting screen 2 Press C nine times until the current button operation tone setting or appears 3 Press D to toggle the setting between tone on and tone off 4 Press A to exit the setting screen The mute indicator is displayed in all modes when the button operation tone is turned off Mute indicator E 66 Power Saving Function When turned on the Power Saving function enters a sleep state automatical...

Page 8: ...om the year 2000 to 2099 Other Home City code can be assigned one of 48 city codes Standard Time Daylight Saving Time summer time Diving Functions Dive time measurement unit 1 second Dive time measurement range 23 59 59 24 hours Dive interval time measurement unit 1 minute Dive interval time measurement range 47 59 48 hours Diving log records 10 Dive start month day and time dive time dive interva...

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