La Crosse Technology WT-941 Manual

La Crosse Technology Ur WT-941

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Side 1/2

MODEL: WT-941

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 OPERATIO

II.

III.

IV.

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.

ACTIVATION

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).

DAYLIGHT SAVING TIME (DST)

Through the WWVB signals, the watch automatically adjusts for Daylight

Saving Time.

SHUTDOWN AND RESETTING

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

activate the watch again.

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.

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 “-:--”.

TIME ZONE key

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

“Hawaii Time displayed

(GMT-10)

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.

VII.

VIII.

TROUBLESHOOTING

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.

Problem: No WWVB signal (indicated by the absence of the WWVB tower icon).

Solution: 1) Check the selected Time Zone. If it is set between GMT+1 and GMT

+12, the WWVB signal will not be received. Change the Time Zone.

2) Move watch 10 feet (3 meters) away from any interfering sources, i.e.

electrical appliances (refrigerators, TV’s, computers), metal surfaces or

objects.

3) To help with overni h in a window with the ght reception, place watc

band inline with the general direction of Ft. Collins, Colorado.

4) There are a few places the signal is very weak (Los Angeles area, Some

parts of Florida and New York City). Since the watch has a much smaller

receiver than our other clocks, it is possible no reception can be made.

Please inform La Crosse Technology in this case.

Problem: The watch displays “-:--” and no date

Solution: 1) The watch entered the power off mode and was reactivated. No signal

has been located, and no time is set. Once the watch receives the time

signal successfully (usually at night), it will display the correct time and

date (Eastern Time zone is the default).

Problem: The hour or minute is incorrect, even though the tower icon is on

(indicating a successful reception of the WWVB time signal the previous

night) and it is set to the proper time zone.

Solution: 1) Electrical interference caused the time signal to be improperly received.

Be sure the watch is at least six feet from any source of electrical activity

(television, computer). Overnight it should correct itself.

2) You may need to perform a reset; follow the directions outlined in

section IV.

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

to 100 feet, do not submerge in water for extended periods of time.

1. ADJUSTING THE STRAP

The rubber strap is adjustable to fit most all wrist sizes. It is also

replaceable with a properly sized band available at a local watch or

department store. The strap is held in place by a pin on each side.

REPLACING THE BATTERY

The battery can either be replaced by a qualified jeweler or watch repair shop,

or by the user.

Any damage resulting from this procedure

is not covered under warranty.

Note: For all questions not answered contact La Crosse Technology (contact

information is below).

WARRANTY INFORMATION

La Crosse Technology provides a 1-year warranty on this watch. Contact La Crosse Technology

immediately upon discovery of any defects covered by this warranty. Before sending the watch in

for repairs, contact La Crosse Technology. The watch will be repaired or replaced with the same

or similar model. This warranty does not cover any defects resulting from improper use,

unauthorized repairs, faulty batteries, or the watch’s inability to receive a signal due to any source

of interference.

Battery clip

Battery

compartment

1. Remove the four screws located

on the back and remove the cover.

Be sure the watch movement and

gasket do not come out of

the case. LA CROSSE TECHNOLOGY WILL NOT ASSUME LIABILITY FOR INCIDENTAL,

CONSEQUENTIAL, PUNITIVE, OR OTHER SIMILAR DAMAGES ASSOCIATED WITH

THE OPERATION OR MALFUNCTION OF THIS WATCH. THIS PRODUCT IS NOT TO BE

USED FOR MEDICAL PURPOSES OR FOR PUBLIC INFORMATION. THIS PRODUCT IS

NOT A TOY. KEEP OUT OF CHILDRENS’ REACH.

2. Remove the old battery

by gently prying up the

battery clip.

3. Insert a new battery of the type “CR1620” 3 Volt Lithium Cell battery This warranty gives you specific legal rights. You may also have other rights specific to your