MO0306-EA Operation Guide 2608 2638 2688 Getting Acquainted Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary. · 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. Expose the watch to bright light to charge its battery before using it. You can use this watch even as its battery is being charged by exposure to bright light. · Be sure to read "Battery" of this manual for important information you need to know when exposing the watch to bright light. About This Manual · The operational procedures for Modules 2608, 2638 and 2688 are identical. All of the illustrations in this manual show Module 2608. · 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. If the display of the watch is blank... Sleep indicator If the sleep indicator (S /SLEEP ) is on the display, it means that the display is blank because the watch's Power Saving function has shut it to conserve power. Power Saving automatically turns off the display and enters a sleep state whenever your watch is left in an area where it is dark for a certain period. · The initial factory default setting is Power Saving on. · The watch recovers from the sleep state if you move it to a well-lit area*, if you press any button, or if you angle the watch towards your face for reading. · See "Power Saving Function" for more information. (Light) (Light) (Light) Module 2608 Module 2638 Module 2688 * It can take up to two seconds for the display to turn on. General Guide · Press C to change from mode to mode. · In any mode, press L to illuminate the display. Time Recorder Mode L World Time Mode Timekeeping Mode Press C. Stopwatch Mode Alarm Mode Radio-controlled Atomic Timekeeping PM indicator Day of week L Month ­ Day Hour : Minutes Seconds 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*. "North America" in this refers to the * The term consists of Canada, theUser's GuideUnited States, area that continental and Mexico. · 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". · 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". Important! · When getting ready to receive the time calibration signal, 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. Current Time Setting This watch automatically adjusts its time setting in accordance with a time calibration signal. You can also perform a manual procedure to set the time and date, when necessary. · 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. Resin Band Metal Band To set your Home City 1. In the Timekeeping Mode, hold down A until the city code starts to flash, which indicates the setting screen. City code 2. 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(P (Pacific) indicator): Los Angeles, San Francisco, Las Vegas, Seattle, Vancouver, Tijuana DEN(M (Mountain) indicator): Denver, El Paso, Edmonton, Culiacan E/C/M/P indicator CHI(C (Central) indicator): Chicago, Houston, Dallas/Fort Worth, New Orleans, Winnipeg, Mexico City NYC(E (Eastern) indicator): New York, Detroit, Miami, Boston, Montreal · Note that this watch does not have a city code that corresponds to Newfoundland. 3. Press A twice to exit the setting screen. · 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. · 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. L 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 hightension power lines · 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. 2,000 miles 600 miles Time Calibration Signal Reception There are two different methods you can use to receive the time calibration signal: auto receive and manual receive. Fort Collins · Under good reception conditions, signal reception is possible within a radius of about 2,000 miles (3,000 kilometers) from the Fort Collins transmitter. L Among or behind mountains L 1 Operation Guide 2608 2638 2688 · 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 interferance may also cause problems with reception. · 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 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). Note · The auto receive operation is performed only if the watch is in the Timekeeping Mode or World Time Mode when one of the calibration times is reached. It is not performed if a calibration time is reached while an alarm is sounding, or while you are configuring settings (while settings are flashing on the display). · Auto receipt of the calibration signal is designed to be performed early in the morning, while you sleep (provided that the Timekeeping Mode time is set correctly). Before going to bed for the night, remove the watch from your wrist, and put it in a location where it can easily receive the signal. · When auto receive is turned on, the watch receives the calibration signal for two to six minutes everyday when the Timekeeping Mode time reaches each of the calibration times. Do not perform any button operation within six minutes before or after any one of the calibration times. Doing so can interfere with correct calibration. · Remember that reception of the calibration signal depends on the time kept in the Timekeeping Mode. The receive operation will be performed whenever the display shows any one of the calibration times, regardless of whether or not the Timekeeping Mode time is actually the correct time. · When two, three, or four receptions are successful, the watch uses the data of the last reception for calibration. When only one reception is successful, the watch uses the data of the successful reception. About the Receiving Indicator The receiving indicator shows the strength of the calibration signal being received. For best reception, be sure to keep the watch in a location where signal strength is strongest. Modules 2608, 2638, and 2688 Module 2608 Module 2638 Receiving indicator Weak (Level 1) Strong (Level 4) Signal Receive Troubleshooting Check the following points whenever you experience problems with calibration signal reception. Problem Probable Cause Cannot perform · The watch is not in the Timekeeping Mode. manual receive. · Your current Home City is not one of the following city codes: LAX, DEN, CHI, or NYC. Auto receive is · You changed the time setting manually. turned on, but · The watch was not in the Timekeeping or World Time Mode, or you performed the Level 4 receiving some button operation during the auto indicator does receive operation. not appear on · Even if receive is successful, the Level 4 receiving indicator disappears every the display. day at 3 am. · Time data (hour, minutes, seconds) only was received during the last receive operation. The Level 4 receiving indicator appears only when time data and date data (year, month, day) are both received. · If the time is one hour off, the DST Time setting is setting may be incorrect. incorrect following signal · The Home City code setting is not correct for the area where you are using reception. the watch. What you should do · Enter the Timekeeping Mode and try again. · Select LAX, DEN, CHI, or NYC as your Home City. · Perform manual signal receive or wait until the next auto signal receive operation is performed. · Check to make sure the watch is in a location where it can receive the signal. · Change the DST setting to Auto DST. · Select the correct Home City code. · For further information, see "Important!" under "Time Calibration Signal Reception" and "Radio-controlled Atomic Timekeeping Precautions". World Time City code World Time shows the current time in 30 cities (29 time zones) around the world. · For full information on city codes, see the "City Code Table". · The current time for all city codes in the World Time Mode is calculated in accordance with the Greenwich Mean Time (GMT) differential for each city, based on the your Home City time setting. · All of the operations in this section are performed in the World Time Mode, which you enter by pressing C. Home city time Current time in the selected city code · Even in an area where signal strength is strong, it takes about 10 seconds for signal reception to stabilize enough for the receiving indicator to indicate signal strength. · Use the receiving indicator as a guide for checking signal strength and for finding the best location for the watch during signal receive operations. · Following reception of the time calibration signal and calibration of the watch's time setting, the Level 4 receiving indicator will remain on the display in all modes. The Level 4 receiving indicator will not be displayed if signal reception was unsuccessful or after you adjust the current time setting manually. · The Level 4 receiving indicator is displayed only when the watch is able to successfully receive both time and date data. It does not appear when only time data is received. · The Level 4 receiving indicator indicates that at least one of the auto calibration signal receive operations was successful. Note, however, that the Level 4 receiving indicator is cleared from the display at 3:00 a.m. each day. To view the time for another city code While in the World Time Mode, press D to scroll through the city codes (time zones) to the east or B to scroll to the west. · If the current time shown for a city is wrong, check your Timekeeping Mode time and Home City settings and make the necessary changes. To toggle a city code time between Standard Time and Daylight Saving Time 1. In the World Time Mode, use B and D to display the city code (time zone) whose Standard Time/Daylight DST indicator Saving Time setting you want to change. 2. Hold down A to toggle Daylight Saving Time (DST indicator displayed) and Standard Time (DST indicator not displayed). · The DST indicator is on the display whenever you display a city code for which Daylight Saving Time is turned on. · Note that the DST/Standard Time setting affects only the Module 2608 currently displayed city code. Other city codes are not affected. · Daylight Saving Time (DST) advances the time setting by one hour from Standard Time. Remember that not all countries or even local areas use Daylight Saving Time. · The ...