Casio 3261

E-1
ENGLISH
Congratulations upon your selection of this CASIO watch.
Operation Guide 3261 3281
MO1104-EA
E-2
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 that appears on the display of this watch is not
intended for navigation purposes. Always use proper instruments and
resources to obtain data for navigation purposes.
• When engaging in mountain climbing or other activities in which losing your
way can create a dangerous or life-threatening situation, always use a second
compass to confirm direction readings.
• 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-3
About This Manual
• Depending on the model of your watch, display text appears either as dark figures
on a light background (Module 3261), or light figures on a dark background
(Module 3281). All of the illustrations in this manual show Module 3261.
• Button operations are indicated using the letters shown in the illustration.
• Note that the product illustrations in this manual are intended for reference only,
and so the actual product may appear somewhat different than depicted by an
illustration.
Module 3261 Module 3281
E-4
Things to check before using the watch
1. Check the battery power level.
Is “H” or “M” displayed for the battery power indicator
(page E-14)?
Go to step 2.
Power is low. Charge the watch by placing it in a
location where it is exposed to light. For details,
see “Charging the Watch” (page E-12).
NO YES
YES
Does any one of the following conditions exist?
• Battery power indicator shows “
L
” and “
LOW
” is
displayed in the upper right corner of the screen.
• “
CHG
” is displayed in the upper right corner of the screen.
• The face is blank.
The watch is charged
sufficiently.
For details about
charging, see
“Charging the Watch”
(page E-12).
NEXT
Battery power
indicator
E-5
2. Check the Home City and the daylight saving time (DST) setting.
Use the procedure under “To configure Home City settings” (page E-26) to configure
your Home City and daylight saving time settings.
Important!
World Time Mode data depend on correct Home City, time, and date settings in the
Timekeeping Mode. Make sure you configure these settings correctly.
3. Set the current time.
• To set the time manually
See “Configuring Current Time and Date Settings” (page E-29).
The watch is now ready for use.
E-6
Contents
E-3 About This Manual
E-4 Things to check before using the watch
E-12 Charging the Watch
E-19 To recover from the sleep state
E-20 To turn Power Saving on and off
E-21 Mode Reference Guide
E-25 Timekeeping
E-26 Configuring Home City Settings
E-26 To configure Home City settings
E-28 To change the Daylight Saving Time (summer time) setting
E-7
E-29 Configuring Current Time and Date Settings
E-29 To change the current time and date settings
E-33 Digital Compass
E-34 To take a digital compass reading
E-40 To perform magnetic declination correction
E-42 To perform bidirectional calibration
E-43 To perform northerly calibration
E-46 To store a direction angle reading in Bearing Memory
E-48 To set a map and find your current location
E-50 To find the bearing to an objective
E-52 To determine the direction angle to an objective on a map and head in
that direction
E-8
E-57 Thermometer
E-57 To enter and exit the Digital Compass/Thermometer Mode
E-59 To calibrate the temperature sensor
E-61 Specifying Temperature Unit
E-61 To specify temperature unit
E-63 Temperature Reading Precautions
E-64 Using the Moon Data
E-64 To enter the Moon Data Mode
E-67 To reverse the displayed Moon phase
E-71 Checking the Current Time in a Different Time Zone
E-71 To enter the World Time Mode
E-72 To view the time in another time zone
E-72 To specify standard time or daylight saving time (DST) for a city
E-9
E-74 Using the Stopwatch
E-74 To enter the Stopwatch Mode
E-74 To perform an elapsed time operation
E-75 To pause at a split time
E-75 To measure two finishes
E-77 Using the Countdown Timer
E-77 To enter the Countdown Timer Mode
E-78 To specify the countdown start time
E-79 To perform a countdown timer operation
E-79 To stop the alarm

Casio 3261 Specifications

General

Model	3261
Category	Watch
Brand	Casio
Type	Digital
Movement	Quartz
Case Material	Resin
Dial Color	Black
Strap Material	Resin
Display	Digital
Alarm	Yes
Water Resistance	100 meters
Features	Countdown Timer
Battery Life	7 years
Backlight	LED backlight
Calendar	Auto-calendar (pre-programmed until the year 2099)

Summary

Things to Check Before Using the Watch

Check Battery Power Level

Verify the battery indicator status and take action if power is low.

Home City and DST Settings

Configure your Home City and daylight saving time (DST) settings for accurate timekeeping.

Set Current Time

Manually adjust the watch's current time and date settings.

Charging the Watch

Charging Guide and Precautions

Learn how to charge the watch using light and important warnings about heat.

Power Levels and Indicators

Understand the battery power indicator levels and their corresponding function statuses.

Charging Times

View estimated times required to charge the watch from different levels under various light conditions.

Power Saving Function

Understanding Power Saving States

Learn about display and function sleep states when Power Saving is active.

Recovering from Sleep State

Methods to wake the watch from its sleep state, such as moving to light or pressing buttons.

Managing Power Saving

Toggle Power Saving OnOff

Procedure to enable or disable the Power Saving function and its indicator.

Mode Reference Guide

Overview of Watch Modes

List of available watch modes and their primary functions.

Selecting a Mode

Navigating Between Watch Modes

Instructions on how to switch between different functional modes of the watch.

Timekeeping Mode Operations

Viewing Time and Date

How to view current time, date, day of the week, and dual time settings.

Configuring Home City and DST

Setting Home City

Procedure to select your primary Home City for accurate time and date settings.

Changing Daylight Saving Time

How to toggle the Daylight Saving Time (DST) setting on or off for the selected city.

Setting Current Time and Date

Adjusting Time and Date Settings

Steps to manually change the current time, date, year, and 12/24-hour format.

Digital Compass Functionality

Taking a Compass Reading

Instructions on how to use the watch's built-in compass to determine direction.

Understanding Compass Readings

Explanation of direction indicators, angle values, and pointers shown during measurement.

Calibrating the Bearing Sensor

Procedures for magnetic declination correction, bidirectional, and northerly calibration.

Magnetic Declination Correction

Setting Declination Angle

How to input magnetic declination for accurate true north readings.

Bearing Sensor Calibration

Performing Bidirectional Calibration

Steps to calibrate the sensor using two opposing directions for accuracy.

Performing Northerly Calibration

How to calibrate the sensor by teaching it the direction of true north.

Bearing Memory Function

Storing Direction Readings

How to store a specific direction angle in memory for later reference.

Using Compass for Navigation

Setting a Map and Finding Location

Aligning a map with the watch's direction indication to find your current position.

Finding Bearing to an Objective

Using the compass and map to determine the direction towards a specific point.

Heading Towards an Objective

Steps to determine direction angle and follow it using Bearing Memory.

Digital Compass Precautions

Factors Affecting Accuracy

Information on magnetism, location, and environmental factors affecting compass readings.

Thermometer Operations

Entering and Exiting Thermometer Mode

How to access the thermometer function and return to other modes.

Temperature Sensor Calibration

Procedure to calibrate the temperature sensor for accurate readings.

Specifying Temperature Unit

Setting Temperature Units (CF)

How to choose between Celsius and Fahrenheit for temperature display.

Temperature Reading Precautions

Ensuring Accurate Temperature Readings

Tips for taking accurate temperature measurements, such as removing the watch.

Using the Moon Data

Entering Moon Data Mode

How to access the mode displaying Moon phase and age information.

Reversing Moon Phase Display

Procedure to flip the Moon phase indicator for correct viewing from your location.

World Time Mode

Viewing Other Time Zones

How to check the current time in different cities around the world.

Setting DST for World Cities

How to adjust standard time or daylight saving time for selected World Time cities.

Using the Stopwatch

Stopwatch Operations

Instructions for starting, stopping, splitting, and measuring two finishes with the stopwatch.

Using the Countdown Timer

Countdown Timer Operations

How to set, start, stop, and manage the countdown timer and its alarm.

Using the Alarm

Setting and Managing Alarms

How to set, test, and turn alarms and the hourly time signal on or off.

Illumination Features

Manual and Auto Illumination

How to turn on the display light manually or use the auto light switch.

Adjusting Illumination Duration

How to select between 1.5-second and 3-second illumination times.

Auto Light Switch Precautions

Important safety notes and usage tips for the auto light switch function.

Display Area Overview

Understanding the Graphic Area

Explanation of the information displayed in the watch's graphic area depending on the mode.

Button Operation Tone

Managing Button Beep Sounds

How to turn the button operation tone on or off and the function of the mute indicator.

Troubleshooting Guide

Time and Sensor Errors

Common issues with time settings, sensor malfunctions, and ERR messages.

Compass and World Time Issues

Solutions for incorrect direction readings, calibration errors, and World Time discrepancies.

Charging and Resume Problems

Troubleshooting watch not resuming after exposure to light and other charging issues.

Watch Specifications

Technical Details and Accuracy

Key specifications including accuracy, timekeeping, modes, and sensor capabilities.

Component Specifications

Sensor Precision and Other Features

Details on bearing sensor precision, temperature sensor, moon data, world time, and stopwatch.