La Crosse Technology setup guide Model WT-951 WWVB-RADIO Controlled Watch

MODEL: WT-951

WWVB—RADIO CONTROLLED WATCH

ABOUT WWVB (Radio Controlled Time)

The NIST (National Institute of Standards and Technology—Time and Frequency Division) WWVB radio station is located in Ft. Collins, Colorado, and transmits the exact time signal continuously at 60 kHz. The signal can be received up to 2,000 miles away through the internal antenna in the watch. However, due to the nature of the Earth’s Ionosphere, reception is very limited during daylight hours. The Watch will search for a signal every night when reception is best. The WWVB radio station derives its signal from the NIST Atomic clock in Ft. Collins, Colorado. A team of atomic physicists is continually measuring every second, of every day, to an accuracy of ten billionths of a second per day. These physicists have created an international standard, measuring a second as 9,192,631,770 vibrations of a Cesium-133 atom in a vacuum. This watch is regulated by the WWVB transmitter.

SET-UP GUIDE, FEATURES, AND OPERATION

I. ACTIVATION TIME ZONE key

The Radio-Controlled watch is programmed and shipped in a battery-saving mode. The LCD (Liquid Crystal Display) displays “OFF” and must be activated before set-up can begin. Your watch may not be in this mode; if not all you need to do is set your time zone (the correct time may or not be shown).

1.Press the TIME ZONE button briefly to activate the WWVB reception search. The LCD lights up briefly and will then display “-:--” and the watch will begin to search for the WWVB signal. If a signal is found, a “tower” icon will flash; if no signal is present, no icon will flash.

2.Within six minutes, the watch will either set to the exact time and date (Eastern is the default), or will display “-:--”.

Do not press the TIME ZONE button while the watch is searching for the WWVB signal, which normally takes 6-10 minutes. However, the optimal time for WWVB reception is between midnight and 6:00 a.m., reception may not occur until this time period. When the WWVB search is complete the time and date will automatically be displayed in the LCD. If the watch is not within range of WWVB signals for an extended period of time it will still continue to operate as a highly accurate quartz controlled clock.

II.TIME ZONE SELECTION

The default Time Zone is Eastern Time (EST, also GMT-5). There are 25 Time Zones to choose from. The selection will cycle from GMT-5 to GMT- 12, then GMT+12 to GMT +1, then GMT, then GMT-1 to GMT –5.

1.Hold down the TIME ZONE button for 2 seconds, or until a Time Zone abbreviation and “ZONE” flash in the LCD, and release.

2.Repeatedly press the TIME ZONE button until the appropriate Time Zone is displayed.

3.Wait 6 seconds for the automatic time-out to exit the Time Zone selection mode.

“Hawaii Time displayed (GMT-10)

Atlantic Time (ATL): GMT-4	Alaska Time (ALA): GMT-9
Eastern Time (EST): GMT-5	Hawaii Time (HAW): GMT-10
Central Time (CST): GMT-6
Mountain Time (MST): GMT-7
Pacific Time (PST): GMT-8	Greenwich Mean Time (GMT): GMT

III.DAYLIGHT SAVING TIME (DST)

Through the WWVB signals, the watch automatically adjusts for Daylight Saving Time.

IV. SHUTDOWN AND RESETTING

This procedure will clear all information. Follow the above sections (I, II) to activate the watch again.

1.Hold down the TIME ZONE button for 6 seconds. The LCD will cycle from normal display, to Time Zone display, and back to normal display. The final display will be “OFF.”

V.MANUALLY ACTIVATING THE WWVB SEARCH

At any time after the Time Zone has been selected, and during the normal operating mode:

1.Hold down the TIME ZONE button for 4 seconds (the LCD will display the time zone then will revert back to normal view). The WWVB tower icon will appear in the upper right corner of the LCD, indicating that the watch is searching for a WWVB signal.

Note: It is important not to hold the TIME ZONE button down long enough to shutdown or reset the watch.

VI. LOW BATTERY INDICATOR

The watch is supplied with, and powered by a high quality 3V lithium battery with a life expectancy of over 2 years. There is a low-battery indicator that appears between the minutes and the date when the battery is low. The battery should be replaced within 2 months of the appearance of the low- battery indicator.

VII. MAINTENANCE AND CARE

Under normal conditions, the watch is shock resistant, however avoid excessive “rough” treatment of the watch as this may cause serious damage. Clean the watch with a soft dry cloth, or with one moistened with a mild soap solution. Do not use any chemical cleaning solutions, these may cause permanent damage to the watch’s surface. While the watch is water resistant