Casio STANDARD MWD100H

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Operation Guide 3487

E-9

Alarms

You can set up to five independent multi-function alarms

with hour, minutes, month, and day. When an alarm is

turned on, the alarm tone sounds when the alarm time is

reached. One of the alarms has a snooze feature.

You can also turn on an Hourly Time Signal that causes

the watch to beep every hour on the hour.

x There are five alarms numbered 1 through 5. The

Hourly Time Signal screen is indicated by :00.

x All of the operations in this section are performed

in the Alarm Mode, which you enter by pressing C

(page E-4).

Alarm time

(Hour : Minutes)

Alarm number

Alarm date

(Month – Day)

E-8

To toggle between 12-hour and 24-hour timekeeping

In the Timekeeping Mode, press D to toggle between 12-hour timekeeping and

24-hour timekeeping.

x 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 p.m. and no indicator appears to

the left of the hour digits for times in the range of midnight to 11:59 a.m.

x With the 24-hour format, times are displayed in the range of 0:00 to 23:59,

without any indicator.

x The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all other modes.

E-7

3. When the setting you want to change is flashing, press D to change it as

described below.

To change this setting Perform this button operation

Seconds

Press D to reset to 00.

Hour, Minutes, Year, Month, Day

Press D to increase the setting.

x Pressing D while the seconds are in the range of 30 to 59 resets them to 00

and adds 1 to the minutes. In the range of 00 to 29, the minutes are unchanged.

4. Press A to exit the setting screen.

x The day of the week is automatically displayed in accordance with the date

(year, month, and day) settings.

x The year can be set in the range of 2000 to 2099.

x The watch’s built-in full automatic calendar automatically makes allowances for

different month lengths and leap years. Once you set the date, there should be

no reason to change it except after you have the watch’s battery replaced.

E-6

Timekeeping

Use the Timekeeping Mode to set and view the current

time and date.

To set the time and date

1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting

screen.

2. Press C to move the flashing in the sequence shown

below to select other settings.

Seconds Hour Minutes

Day YearMonth

Hour : Minutes

Seconds

Day of week

Month – Day

PM indicator

E-5

Countdown Timer

Mode

Stopwatch Mode Dual Time Mode

x In any mode, hold down C for about one second to return to the Timekeeping

Mode.

E-4

General Guide

x Press C to change from mode to mode.

x In any mode, press B to illuminate the display.

Timekeeping Mode Alarm Mode

E-3

To set the Dual Time .............................................................................................E-21

To turn on the backlight .......................................................................................E-22

E-2

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-6

To toggle between 12-hour and 24-hour timekeeping ........................................E-8

To set an alarm time .............................................................................................E-11

To test the alarm ...................................................................................................E-13

To turn Alarms 2 through 5 and the Hourly Time Signal on and off .................E-14

To select the operation of Alarm 1 ......................................................................E-15

To use the countdown timer ................................................................................ E-16

To set the countdown start time .........................................................................E-17

To turn auto-repeat on and off ............................................................................E-18

To measure times with the stopwatch ................................................................E-20

E-1

Contents

General Guide .......................................................................................................... E-4

Timekeeping ............................................................................................................E-6

Alarms.......................................................................................................................E-9

Countdown Timer .................................................................................................. E-16

Stopwatch .............................................................................................................. E-19

Dual Time ...............................................................................................................E-21

Backlight ................................................................................................................E-22

Reference ............................................................................................................... E-23

Specifications ........................................................................................................E-25

Operating Precautions .......................................................................................... E-27

User Maintenance .................................................................................................E-37

About This Manual

x Button operations are indicated using the letters

shown in the illustration.

x 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.

x To ensure that this watch provides you with the years

of service for which it is designed, carefully read and

follow the instructions under “Operating Precautions”

and “User Maintenance”.

x Be sure to keep all user documentation handy for

future reference.

MA2003-EA

Need help?

Do you have a question about the Casio STANDARD MWD100H and is the answer not in the manual?

This document describes the operation and features of the CASIO Operation Guide 3487, a multi-function digital watch.

Function Description

The watch offers several modes to manage time and other functions:

Timekeeping Mode: Displays the current time (hour, minutes, seconds) and date (month, day, day of the week). It allows setting the time and date, and toggling between 12-hour and 24-hour formats. The built-in full automatic calendar adjusts for different month lengths and leap years.
Alarm Mode: Provides five independent multi-function alarms, including one with a snooze feature. Alarms can be set as daily, date, 1-month, or monthly alarms. The watch also features an Hourly Time Signal, which beeps every hour on the hour.
Countdown Timer Mode: A timer that can be set for durations from one minute to 24 hours. An alarm sounds when the countdown reaches zero. It includes an auto-repeat function that automatically restarts the countdown from the original value.
Stopwatch Mode: Measures elapsed time, split times, and two finishes with 1/100-second accuracy.
Dual Time Mode: Allows tracking time in a different time zone, with seconds synchronized to the Timekeeping Mode.
Backlight: An LED (light-emitting diode) backlight illuminates the display for easy reading in the dark.

Important Technical Specifications

Accuracy: ±30 seconds a month at normal temperature.
Timekeeping:
- Hour, minutes, seconds, p.m. (P), month, day, day of the week.
- Time system: Switchable between 12-hour and 24-hour formats.
- Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099.
Alarms:
- 5 Multi-function alarms (1 with snooze feature).
- Hourly Time Signal.
- Alarm types: Daily alarm, Date alarm, 1-month alarm, Monthly alarm.
Countdown Timer:
- Measuring unit: 1 second.
- Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments).
- Other: Auto-repeat function.
Stopwatch:
- Measuring unit: 1/100 of a second.
- Measuring capacity: 23:59'59.99".
- Measuring modes: Elapsed time, split time, two finishes.
Dual Time: Hour, minutes, seconds, p.m. (P).
Backlight: LED (light-emitting diode) backlight.
Battery: One lithium battery (Type: CR2025).
- Approximately 10 years on type CR2025 (assuming alarm operation 10 sec./day, and one backlight operation 1.5 sec./day).
Specifications are subject to change without notice.

Usage Features

Mode Navigation: Pressing the 'C' button changes from mode to mode. Holding down the 'A' button for about one second returns to the Timekeeping Mode from any other mode.
Display Illumination: Pressing the 'B' button illuminates the display for about one second in any mode.
Setting Operations: Button operations are indicated by letters (A, B, C, D) corresponding to the physical buttons on the watch. Holding down the 'A' button typically initiates a setting screen, indicated by flashing digits. The 'D' button is generally used to scroll through settings or increase values.
Time and Date Setting: In Timekeeping Mode, hold 'A' until seconds flash. Use 'C' to move flashing between seconds, hour, minutes, year, month, and day. Use 'D' to change values. Press 'A' to exit.
12/24-Hour Format: In Timekeeping Mode, press 'D' to toggle between 12-hour (with 'P' indicator for PM) and 24-hour formats. This setting applies to all modes.
Alarm Setting: In Alarm Mode, use 'D' to select an alarm (1-5) or the Hourly Time Signal (:00). Hold 'A' to enter setting mode. Use 'C' to move flashing between hour, minutes, month, and day. Use 'D' to change values. Press 'A' to exit. Setting '-' for month or day creates daily, monthly, or 1-month alarms.
Alarm Operation: Alarm tones sound for 10 seconds. Snooze alarm repeats every five minutes for a total of seven times. Any button press stops the alarm tone. Certain operations (like entering Timekeeping Mode setting screen or Alarm 1 setting screen) cancel snooze.
Alarm Test: In Alarm Mode, hold 'D' to sound the alarm.
Turning Alarms On/Off: For Alarms 2-5 and Hourly Time Signal, select the desired alarm/signal with 'D', then press 'A' to toggle on/off. Indicators show status in all modes.
Alarm 1 Operation Selection: For Alarm 1, use 'D' to select it, then press 'A' to cycle through Snooze On, Alarm On, and Alarm Off.
Countdown Timer Usage: In Countdown Timer Mode, press 'D' to start/pause the timer. Press 'A' to stop and reset to the starting value.
Countdown Timer Setting: In Countdown Timer Mode, hold 'A' until hours flash. Use 'C' to move flashing between hours and minutes. Use 'D' to increase values. Set 0:00 for 24 hours. Press 'A' to exit.
Countdown Timer Auto-Repeat: In Countdown Timer Mode, hold 'A' until hours flash, then press 'B' to toggle auto-repeat on/off. The auto-repeat indicator appears when on.
Stopwatch Usage: In Stopwatch Mode, 'D' starts/stops the timer, 'A' resets it. For split times, 'A' records split, 'D' stops. For two finishes, 'A' records first runner, 'D' stops second, 'A' displays second, then 'A' resets.
Dual Time Setting: In Dual Time Mode, hold 'A' until hour flashes. Use 'C' to move flashing between hour and minutes. Use 'D' to increase values. Press 'A' to exit.
Auto Return Feature: If a setting screen is left idle for two or three minutes, the watch automatically saves settings and exits the screen.
Data Scrolling: Holding down the 'D' button during a scroll operation scrolls through data at high speed.

Maintenance Features

Battery Life: The watch is powered by one CR2025 lithium battery, with an approximate battery life of 10 years, assuming typical alarm and backlight usage.
Calendar Maintenance: The full automatic calendar requires no adjustment for month lengths or leap years once the initial date is set, except after battery replacement.
Backlight Precautions:
- Illumination may be difficult to see under direct sunlight.
- The backlight automatically turns off when an alarm sounds.
- Frequent use of the backlight shortens battery life.