Casio WVA-104HDA-7AV - User Manual

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Operation Guide COMBIWAVE1

MO0610-EA

About This Manual

• The operational procedures for Modules 2735, 3747, and 4772 are identical. All of

the illustrations in this manual show Module 2735.

• Button operations are indicated using the letters shown in the illustration.

• This watch does not have a time zone that corresponds to the Greenwich

Mean Time differential of –3.5 hours. Because of this, the radio-controlled

timekeeping and World Time functions will not display the correct time for

Newfoundland, Canada.

Module 2735 Module 3747 Module 4772

• 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.

General Guide

• Press C to change from mode to mode.

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

Timekeeping Mode

Press C.

▲

World Time Mode

Alarm Mode

Date Alert Mode

Time Recorder Mode

Stopwatch Mode

Hand Setting Mode

▲

Radio-controlled Atomic Timekeeping

This watch receives a time calibration signal and updates

its time setting accordingly. The time calibration signal

includes both Standard Time and Daylight Saving Time

(summer time) data.

• This watch is designed to pick up the time calibration

signal transmitted from Fort Collins, Colorado (USA).

Reception is possible within North America*.

The term “North America” in this User’s Guide refers to the

area that consists of Canada, the continental United States,

and Mexico.

Current Time Setting

This watch automatically adjusts its digital time setting in

accordance with a time calibration signal. You can also

perform a manual procedure to set the time and date,

when necessary.

Month – Day

Day of week

Minutes hand

Hour hand

• The first thing you should do after purchasing this watch is to set your Home City,

which is the city where you will normally use the watch. For more information, see

“To set your Home City” below.

• When using the watch outside of the range of the transmitter in Fort Collins, you

need to manually adjust the time as required. See “Timekeeping” for information

about manual settings.

• The analog time of this watch is synchronized with the digital time. Because of this,

the analog time setting is automatically adjusted whenever you change the digital

setting. See “Analog Timekeeping” for more information.

To set your Home City

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

transmitter indicator (

USA) starts to flash, which

indicates the setting screen.

2. Press C to display the city code setting screen.

3. Use D(east) and B(west) to select the city code you

want to use as your Home City.

• The following are the city codes for major cities in

North America.

LAX

: Los Angeles, San Francisco, Las Vegas,

Seattle, Vancouver, Tijuana

DEN

: Denver, El Paso, Edmonton, Culiacan

CHI

: Chicago, Houston, Dallas/Fort Worth,

New Orleans, Winnipeg, Mexico City

NYC

: New York, Detroit, Miami, Boston, Montreal

• Note that this watch does not have a city code that

corresponds to Newfoundland.

4. Press A twice to exit the setting screen.

City code

Transmitter

indicator

• The first press of A displays the 12/24-hour setting

screen. Pressing A again exits the setting screen.

Important!

• Normally, your watch should show the correct time as soon as you select your Home

City code. If it does not, it should adjust automatically after the next auto receive

operation (in the middle of the night). You can also perform manual receive or you

can set the time manually.

• If you are in an area that does not use Daylight Saving Time (summer time), turn off

the DST setting.

Time Calibration Signal Reception

There are two different methods you can use to receive the time calibration signal:

auto receive and manual receive.

• Auto Receive

With auto receive, the watch automatically picks up the time calibration signal four

times a day at 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. For more information,

see “About Auto Receive”.

Important!

• Position the watch as shown in the nearby illustration, with its 12 o’clock side facing

towards a window. Make sure there are no metal objects nearby.

Resin Band

Metal Band

• The watch should not be on its side or facing the wrong way.

• Proper signal reception can be difficult or even impossible under the conditions listed

below.

• Signal reception is normally better at night than during the day.

• Time calibration signal reception takes from two to six minutes, but in some cases it

can take as long as 12 minutes. Take care that you do not perform any button

operations or move the watch during this time.

Inside or

among

buildings

Inside a

vehicle

Near

household

appliances or

office

equipment,

or a mobile

phone

Near a

construction

site, airport, or

other sources

of electrical

noise

Near high-

tension

power lines

Among or

behind

mountains

• At distances further than about 600 miles (1,000 kilometers) from the transmitter,

signal reception may not be possible during certain times of year or times of day.

Radio interference may also cause problems with reception.

• Even when the watch is within the reception range of the transmitter, signal

reception is impossible if the signal is blocked by mountains or other geological

formations between the watch and signal source.

2,000 miles

Fort Collins

600 miles

• Signal reception is affected by weather, atmospheric conditions, and seasonal

changes.

• See the information under “Signal Receive Troubleshooting” if you experience

problems with time calibration signal reception.

About Auto Receive

When auto receive is turned on, the watch automatically starts to receive the time

calibration signal when the digital time in the Timekeeping Mode reaches 2:00 a.m.,

3:00 a.m., 4:00 a.m., and 5:00 a.m. each day (calibration times).

• Manual Receive

Manual receive lets you start a time calibration receive operation with the press of a

button. For more information, see “To perform manual receive”.

Main Page

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Summary

About This Manual

General Guide

General operations for navigating modes and using the display illumination.

Radio-controlled Atomic Timekeeping

Information on receiving time calibration signals and automatic time updates.

Signal Reception and Setting

Procedure for selecting Home City, receiving signals, and auto receive details.

Signal Receive Troubleshooting

World Time Functions

Overview of World Time feature, viewing, and DST settings for different cities.

Alarms and Hourly Time Signal

Details on setting alarms, snooze, target alarms, and hourly time signals.

Time Recorder Functions

Recording and Recalling Times

Steps to capture and retrieve specific date and time records.

Deleting Time Records

Method for erasing all stored time records from the watch's memory.

Stopwatch Functions

Measuring Times with Stopwatch

Instructions for operating the stopwatch for various timing needs.

Timekeeping Operations

Setting Time and Date

Procedures for adjusting DST, manual digital time, and date settings.

Analog Hand Adjustment

How to manually synchronize the analog watch hands with the digital time.

Reference and Precautions

Detailed technical info, auto return, scrolling, and signal reception advice.

Timekeeping and Illumination Details

City Code Table

A reference list of city codes and their corresponding GMT differentials for World Time.

Summary

About This Manual

General Guide

General operations for navigating modes and using the display illumination.

Radio-controlled Atomic Timekeeping

Information on receiving time calibration signals and automatic time updates.

Signal Reception and Setting

Procedure for selecting Home City, receiving signals, and auto receive details.

Signal Receive Troubleshooting

World Time Functions

Overview of World Time feature, viewing, and DST settings for different cities.

Alarms and Hourly Time Signal

Details on setting alarms, snooze, target alarms, and hourly time signals.

Time Recorder Functions

Recording and Recalling Times

Steps to capture and retrieve specific date and time records.

Deleting Time Records

Method for erasing all stored time records from the watch's memory.

Stopwatch Functions

Measuring Times with Stopwatch

Instructions for operating the stopwatch for various timing needs.

Timekeeping Operations

Setting Time and Date

Procedures for adjusting DST, manual digital time, and date settings.

Analog Hand Adjustment

How to manually synchronize the analog watch hands with the digital time.

Reference and Precautions

Detailed technical info, auto return, scrolling, and signal reception advice.

Timekeeping and Illumination Details

City Code Table

A reference list of city codes and their corresponding GMT differentials for World Time.

Overview

Function Description
Timekeeping Mode
Important Technical Specifications (Timekeeping)
Usage Features (Timekeeping)
World Time Mode
Alarm Mode
Date Alert Mode
Stopwatch Mode
Time Recorder Mode
Illumination
Maintenance Features
Limitations

This document describes the operation of the CASIO COMBIWAVE1 watch, which includes Modules 2735, 3747, and 4772. The operational procedures are identical across these modules, with illustrations primarily showing Module 2735.

Function Description:

The COMBIWAVE1 is a radio-controlled atomic timekeeping watch that automatically adjusts its time setting by receiving time calibration signals. It features multiple modes including Timekeeping, World Time, Alarm, Date Alert, Stopwatch, Hand Setting, and Time Recorder.

Timekeeping Mode:

This is the primary mode for viewing and setting the current time and date. The watch receives time calibration signals from Fort Collins, Colorado (USA), enabling automatic adjustment of both digital and analog time. The time calibration signal includes Standard Time and Daylight Saving Time (summer time) data. Reception is possible within North America (Canada, continental United States, and Mexico). The watch automatically adjusts its digital time setting based on the signal. Manual time and date setting is also possible. The analog time is synchronized with the digital time, adjusting automatically when the digital setting changes.

Important Technical Specifications (Timekeeping):

Time Calibration Signal: Transmitted from Fort Collins, Colorado (USA).
Reception Range: Within North America.
Automatic Date Update: From January 1, 2000, to December 31, 2039.
Leap Year Support: Differentiates between leap years and non-leap years.
Accuracy (without signal reception): ±20 seconds per month at normal temperature.
Time Formats: 12-hour and 24-hour formats.
GMT Differential: Calculated based on UTC (Universal Time Coordinated) data.

Usage Features (Timekeeping):

Home City Setting: Essential first step after purchase. Determines the city for time calibration and World Time calculations.
Auto Receive: The watch automatically attempts to receive the time calibration signal four times a day at 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. (calibration times). This operation occurs only in Timekeeping or World Time Mode, not during alarms or setting configurations.
Manual Receive: Allows initiation of a time calibration receive operation by pressing a button.
Receiving Indicator: Displays signal strength (Level 1 to Level 4). Level 4 indicates successful reception of both time and date data.
Daylight Saving Time (DST) Setting: Can be set to Auto DST, DST off, or DST on. Auto DST automatically switches between Standard Time and DST based on the received signal.
Analog Time Adjustment: Automatically synchronized with digital time. Manual adjustment is possible in Hand Setting Mode if analog time does not match digital time.
Displaying Last Signal Screen: Shows the date and time of the last successful time calibration signal reception.

World Time Mode:

Displays the current time in 30 cities (29 time zones) around the world.

Usage: Scroll through city codes using the D button.
DST Toggle: Toggle between Standard Time and Daylight Saving Time for a selected city code by holding down the A button. Note that this does not affect the Home City DST setting.

Alarm Mode:

Offers four one-time alarms (AL1, AL2, AL3, TAL) and one snooze alarm (SNZ). One of the one-time alarms functions as a "target alarm" (TAL) with a countdown feature. The Hourly Time Signal (SHZ) can also be turned on/off in this mode.

Usage: Scroll through alarm screens using the D button. Hold down A to set alarm time.
Alarm Operation: Alarm tone sounds for 10 seconds. Snooze alarm repeats seven times every five minutes.
Testing Alarm: Hold down D in Alarm Mode to sound the alarm.

Date Alert Mode:

Allows setting up to five date alerts (DA1 through DA5) to remember important dates. A date alert indicator (!) and the current date flash for 24 hours when an alert date arrives.

Usage: Scroll through alert screens using the D button. Hold down A to set the alert date (month and day).

Stopwatch Mode:

Measures elapsed time, split times, and two finishes.

Technical Specifications: Display range of 59 minutes, 59.99 seconds.
Usage: D button for Start/Stop/Re-start. A button for Split/Split release.

Time Recorder Mode:

Stores up to 30 time entries (month, day, hour, minutes) with a single button press. Useful for recording event start and end times.

Usage: Press D to record current date and time. Press A to recall recorded times. Hold down A and press D to delete all records.
Storage: Records are assigned numbers sequentially from T1 to T30. Storing a new record when memory is full deletes T1 and shifts remaining records.

Illumination:

The watch features an EL (electro-luminescent) panel that illuminates the entire display for approximately one second for easy reading in the dark.

Usage: Pressing the B button activates illumination.
Maintenance: Frequent use of illumination runs down the battery. The EL panel loses power after very long use.

Maintenance Features:

Auto Return: If left in Alarm, Date Alert, or Hand Setting Mode for two to three minutes without operation, the watch automatically returns to Timekeeping Mode. If left with a flashing setting, it saves settings and exits.
Troubleshooting: The manual provides a troubleshooting guide for signal reception issues, including common problems and solutions (e.g., incorrect Home City, manual time changes, DST settings).
Precautions:
- Strong electrostatic charge can result in wrong time settings.
- Signal reception can be affected by weather, atmospheric conditions, seasonal changes, and geographical obstructions (mountains, buildings).
- Avoid button operations or moving the watch during signal reception (2-12 minutes).
- Position the watch with its 12 o'clock side facing a window, away from metal objects.
- Signal reception is generally better at night.

Limitations:

The watch does not have a time zone for Newfoundland, Canada, and therefore cannot display the correct time for this region via radio control or World Time.
Signal reception may not be possible at distances greater than 600 miles (1,000 kilometers) from the transmitter during certain times of year or day.
Radio interference can cause reception problems.