Casio Module 372 753 User's Guide

Important Information

Battery

The battery in your new watch is installed at the factory and needs replacement when its power runs low (e.g., backlight does not illuminate, display is dim). Contact your nearest CASIO dealer or distributor for replacement.

Water Resistance

Watches are classified by rating (from I to V) according to their water resistance. Refer to the table below for correct operation of your watch.

Rating	Marking	Splashes, Rain, etc.	Swimming, Car Washing, etc.	Scuba Diving, Snorkeling, etc.	Scuba Diving (with Helium-Oxygen Mix)
I	WATER RESISTANT	Yes	No	No	No
II	50M WATER RESISTANT	Yes	No	No	No
III	100M WATER RESISTANT	Yes	Yes	No	No
IV	200M WATER RESISTANT	Yes	Yes	Yes	No
V	300M WATER RESISTANT	Yes	Yes	Yes	Yes

Notes for relevant sections:

I: Watch is not water resistant. Avoid any contact with moisture.
III: Do not press any buttons while the watch is submerged in water.
IV: If the watch is exposed to salt water, rinse it thoroughly and dry it.
V: This watch can be used for scuba diving (except for depths requiring helium-oxygen mixture).

Note for watches with leather straps: Some water-resistant watches have leather straps. Do not wear these watches while swimming or engaging in any other activity that may expose the strap to water.

Care of Your Watch

Never attempt to open the case or remove the back cover.
The rubber gasket that provides water and dust resistance should be replaced every 2-3 years.
If moisture enters the watch, have it checked immediately by your nearest CASIO dealer or distributor.
Do not expose the watch to extreme temperatures.
While designed for normal use, avoid rough handling and dropping the watch.
Do not fasten the strap too tightly. A finger should fit between the strap and your wrist.
Clean the watch and strap with a dry, soft cloth, or a soft cloth dampened with a mild solution of water and neutral detergent. Never use volatile solvents (e.g., benzine, thinner, spray cleaners).
When not in use, store the watch in a dry place.
Avoid contact with benzine, cleaning solvents, spray aerosols, adhesives, paint, etc. Chemical reactions with these materials can damage gaskets, the case, and the watch's finish.
Some models have silk-screened designs on the strap. Be careful when cleaning such straps to avoid damaging the designs.
For watches with plastic straps: You may notice a white powdery substance on the strap. This substance is harmless to your skin or clothing and can be easily removed by wiping with a cloth. Exposure of the plastic strap to sweat or moisture, or storage in high humidity conditions can lead to damage, tearing, or cracking of the strap. To ensure a long service life for the plastic strap, wipe it clean of dirt and moisture with a soft cloth whenever possible.
For watches with fluorescent cases and straps: Prolonged exposure to direct sunlight can cause the fluorescent color to fade gradually. Prolonged contact with moisture can cause the fluorescent color to fade gradually. If any moisture gets on the watch surface, wipe it off as soon as possible. Prolonged contact with any other wet surface can cause the fluorescent color to fade. Ensure the fluorescent surface is free of moisture and avoid contact with other surfaces. Strong friction of a surface with fluorescent paint against another surface can cause the fluorescent paint to transfer to that surface.

CASIO COMPUTER CO., LTD. is not responsible for any damage that may occur from the use of this watch, nor does it accept any claims from third parties.

General Operation

The illustration shows the watch in the Timekeeping Mode. The overall appearance of the watch case may differ depending on the model.

Pressing button C cycles through the modes:

Timekeeping Mode → Notebook Mode → Protected Notebook Mode → Schedule Mode → Alarm Mode → Countdown Timer Mode → Stopwatch Mode → Time/Date Setting Mode → Timekeeping Mode.

Notebook Mode

Use buttons A and L to scroll through entries forward and backward. Holding down a button scrolls entries at a higher speed. Entries are saved in alphabetical order.

To enter the password-protected notebook section, you must enter the password. The screen displays 4 changing digits; each press of button A registers one digit. You must press button A four times to enter the password.

Changing Password

In the password entry mode, press button B.
Enter the old password by pressing button A four times.
Enter the new password by pressing button A four times.

Entering Information into Notebook

Use buttons A or L to scroll to a blank entry.
Press button B.
Use buttons A or L to enter letters and numbers. Move the cursor with button C.
Press button B to save the information.
To cancel the entered information, press buttons A and L simultaneously.

Schedule Mode

Up to 50 entries, each up to 12 characters, can be stored in the schedule. When the specified time and date arrive, an alarm will sound for 20 seconds. The audible alarm can be turned off by pressing any button.

Searching Schedule Entries

When entering Schedule Mode, the entry with the nearest upcoming date is displayed. Use buttons A and L to scroll forward and backward. Once the date specified in a schedule entry has passed, the entry is automatically deleted.

Entering Information

In Schedule Mode, use buttons A or L to scroll to a blank entry.
Press button B.
Use buttons A or L to enter letters and numbers. Move the cursor with button C.
The cursor moves between entry fields in the following sequence: Message Text → Month → Day → Hour → Minute → Predefined Text. There are 5 types of predefined text messages: TEL, MTG (meeting), APP (appointment), TRVL (travel), DR. (doctor).
Press button B to save the information.
To cancel entry, press buttons A and L simultaneously.

Alarm Mode

When the specified time is reached, an alarm will sound for 20 seconds. The audible alarm can be turned off by pressing any button.

Checking the Alarm Sound

In Alarm Mode, press and hold button A to test the alarm sound.

Setting Alarm Activation Time

In Alarm Mode, press button B.
Use button C to move the cursor: Hour → Minute.
Button A increases the selected value, button L decreases it.
Press button B to save the settings.

Managing Alarm Modes

In Alarm Mode, press button L to select the alarm sound mode:

All On
All Off
Daily Alarm Only
Hourly Chime Only

Countdown Timer Mode

The Countdown Timer can be set from 1 minute to 24 hours. When the timer reaches 0, an alarm sounds for 10 seconds. The audible alarm can be turned off by pressing any button.

Setting Initial Value

In Countdown Timer Mode, press button B.
Use button C to move the cursor: Hour → Minute.
Pressing button A increases the selected value, pressing button L decreases it.
Press button B to save the settings.

Stopwatch Mode

The Stopwatch measurement range is 23 hours 59 minutes 59.99 seconds.

Measuring Elapsed Time

A (Start) → A (Stop) → A (Start) → A (Stop) → L (Reset).

With Split Times

A (Start) → L (Split) → L (Cancel Split) → A (Stop) → L (Reset).

1st and 2nd Place Times

A (Start) → L (Split. 1st place) → A (Stop. 2nd place, display shows 1st place result) → L (Cancel Split. Display shows 2nd place result) → L (Reset).

Technical Specifications

Feature	Specification
Timekeeping Mode	Hour, Minute
Digital Display	Hour, Minute, Second, AM/PM indicator, Year, Month, Day, Day of the week. 12/24-hour format switching.
Timekeeping Accuracy	±20 seconds per month (at normal temperature)
Calendar System	Auto calendar up to 2029.
Notebook Mode	50 entries (8 letters, 12 digits)
Schedule Mode	50 entries (12 characters)
Alarm Mode	Daily alarm, hourly chime.
Countdown Timer	Range: 1 minute to 24 hours. Unit: 1 second.
Stopwatch Mode	Measurement accuracy: 1/100 second. Maximum measurement range: 23 hours 59 minutes 59.99 seconds. Measurement modes: Elapsed time, split time, 1st/2nd place times.
Power Supply	One battery (Type SR1120W).
Battery Life	Approximately 2 years (based on 20 seconds of alarm use per day).

Product Information

Information	Details
Name	Wristwatch, electronic / electro-mechanical quartz (Men's/Women's)
Brand	CASIO
Manufacturer	CASIO COMPUTER Co., Ltd.
Manufacturer Address	6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan
Importer	CASIO LLC, Moscow, Sushchevskaya St., 27, Bldg. 1, Russia
Country of Origin	Japan
Warranty Period	1 year
Authorized Service Center for Claims	As per warranty card
Compliance	Product complies with GOST 26270-98 (Clause 4.35). Certificate of conformity No. ROSS JP. AY46.D00003.

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