La Crosse Technology Watch WT 951 User Manual

MODEL: WT-951  
WWVB—RADIO CONTROLLED WATCH  
II.  
TIME ZONE SELECTION  
ABOUT WWVB (Radio Controlled Time)  
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.  
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.  
1.  
2.  
3.  
Hold down the TIME ZONE button for 2 seconds, or until a Time  
Zone abbreviation and “ZONE” flash in the LCD, and release.  
Repeatedly press the TIME ZONE button until the appropriate Time  
Zone is displayed.  
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  
SET-UP GUIDE, FEATURES, AND OPERATIO
Eastern Time (EST): GMT-5  
Central Time (CST): GMT-6  
Mountain Time (MST): GMT-7  
Pacific Time (PST): GMT-8  
Hawaii Time (HAW): GMT-10  
Greenwich Mean Time (GMT): GMT  
TIME ZONE key  
I.  
ACTIVATION  
III. DAYLIGHT SAVING TIME (DST)  
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).  
Through the WWVB signals, the watch automatically adjusts for Daylight  
Saving Time.  
IV. SHUTDOWN AND RESETTING  
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.  
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.”  
2.  
Within six minutes, the watch will either set to the exact time and  
date (Eastern is the default), or will display “-:--”.  
V.  
MANUALLY ACTIVATING THE WWVB SEARCH  
At any time after the Time Zone has been selected, and during the normal  
operating mode:  
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.  
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  
 

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