La Crosse Technology WT-3145U Manual

La Crosse Technology Ur WT-3145U

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Side 1/2

MANUAL TIME SET

BUTTON

PACIFIC TIME

CENTRAL TIME

Model WT- 3145

Radio Controlled Analog Clock

Quick Setup Instructions

Welcome to the world of atomic timekeeping technology. We hope you will enjoy

the convenience of never having to set your clock again and the confidence of

knowing exactly what time it is

• Insert 1 new AA, LR6 1.5 volt ALKALINE battery in the analog clock battery

compartment according to the polarity marked on the case, then 1 new

battery AA, LR6 1.5 V into the digital clock.

• Once the battery is installed, the clock will begin searching for a signal. For

the initial setting, it is recommended to stand the clock in an upright

position near a window. Within 10 minutes3 - the clock will either receive

the WWVB signal and set itself to the exact time (for the default Pacific

Time Zone), or it will determine that the signal is not receivable at its

current location and time of day If the clock does not receive a radio signal .

soon after activated, the clock will start running from the 12:00 position and

will continue to run. In this case, do not attempt to reset the hands

manually even though the time displayed on the clock is incorrect. The

clock is synchronizing to the WWVB signal and once the radio signal is

decoded, the hands will automatically adjust to the correct time. The clock

will fast-forward the hands to the 12 o’clock position immediately and

search for WWVB at specific time until a signal is received. If the time is

manually set, the clock will continue to periodically search for a signal and

automatically reset the hands when the signal is received.

•

• Press time zone button to select a time zone after the clock received the

WWVB signal. If you are in the Pacific Time Zone- you are ready to hang

your clock.

•

If you are not in the Pacific Time Zone, select your time zone by press and

holding for 5 second, one of the four time zone buttons PT-Pacific Time,

MT- - -Mountain Time, CT Central Time, ET Eastern Time. If multiple buttons

are pressed, the clock will set to the time zone selected last. If no time

zone is selected the clock will default to Pacific Time. If you live in an area

that does not recognize DST (Arizona) you must press the (unmarked) DST

button for one second to deactivate your clock’s DST program.

For time zones outside of PT, MT, CT or ET you must manually set the time

using the Manual Time set button on the back of the movement. (See

instructions below). Please Note: WWVB time will over ride a manual

setting.

For a better understanding of how and why your clock works please continue

reading.

NOTHING IS MORE PRECISELY MEASURED THAN TIME!

Since the beginning of time, man has been fascinated with the measurement of

time and has devised more accurate machines to trap and measure time. Today,

time is precisely measured in the United States by the most accurate clock in

North America, the Atomic Clock of the US National Institute of Standards and

Technology, Time and Frequency Division in Boulder, Colorado. A team of

atomic physicists continually measures 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 atomic clock regulates the WWVB radio

transmitter located in Fort Collins, Colorado, where the exact time signal is

continuously broadcast throughout the United States at 60 kHz to take advantage

of stable long wave radio paths found in that frequency range. Radio waves at

these low frequencies use the earth and the ionosphere as a wave guide and -

follow the curvature of the earth for long distances.

The built in antenna system will receive the WWVB signal anywhere in North

America within 2000 miles of Fort Collins where long wave radio reception is -

undisturbed. A microprocessor activates the receiver and processes the time

signal from Fort Collins overnight.

Through the radio signals, La Crosse Technology atomic clocks always keep

precise time. The changeover from standard time to daylight saving time, and

vice versa, takes place automatically with the same precision.

ADDITIONAL DETAILS

To set up your clock simply install one new AA, LR6 ALKALINE battery.

Due to the nature of long wave radio signals it is normally not possible to

receive a signal during the day so it is best to install the battery late in the

evening. After the clock sets itself to Pacific Time, select your time zone by

pressing one of the four time zone buttons PT- -Pacific Time, MT Mountain

Time, CT Central Time, ET- -Eastern Time. Your clock can only set itself to

one of the four time zones stated above. For time zones outside of PT, MT,

CT or ET you must manually set the time using the Manual Time set button

on the back of the movement. Please Note: WWVB time will over ride a

manual setting.

The La Crosse Technology atomic clock is designed for indoor use . For indoor

locations, select a location to place your radio controlled clock where it will be at

least six feet away from a TV, computer, air conditioner or other household

electrical appliances. The optimal location is near a window. Windows facing

Colorado provide the best signal.

Note:

• Do not submerge clock in water.

• Extreme temperatures, vibration, and shock should be avoided to prevent

damage to the clock.

The WWVB time signal will easily penetrate masonry and wood framed buildings.

The WWVB signal will penetrate almost every residential building and most steel

buildings if they have adequate windows. It is not possible, however, for the

WWVB signal to penetrate most indoor shopping malls and rooms in the center

of large office buildings that do not have windows. In buildings that WWVB

cannot penetrate you may set the time using the manual time set button. When

the clock receives the WWVB signal it will automatically set the hands to the

exact time.

La Crosse Technology atomic clocks do not receive or process radio

controlled time signals from Germany’s DCF 77, Japan’s J Ga AS, or

England’s MSFs atomically regulated transmitters. La Crosse Technology

atomic clocks can be manually set and used anywhere. Please Note: WWVB

time will over ride a manual setting.

For more information on the NIST and radio controlled time, see

www.boulder.nist.gov/timefreq/

SET THE TIME USING THE MANUAL TIME SET BUTTON

In some cases, the La Crosse Technology atomic clock may not receive the

WWVB signal due to atmospheric disturbances or hard to reach locations such

as inside shopping malls. In this case, please use the Manual Time Set button,

located at the back of the clock to manually set the time. To do this:

1. Remove the battery and press the Manual set button 10 times.

2. Insert 1 new AA Alkaline battery.

3. Press and hold the Manual Set button until the second hand of the clock

moves to the 12 position.

4. Release the Manual Set button and again press and hold the Manual Set

button fast. The minute and hour hands will -forward while the button is

held.

5. Keep holding the Manual Set button until the time is set as required.

6. Release the button. About 3 seconds later, the second hands will start to

move and the clock is now running with manual time.

Note: When the clock displays manual time, it will continue to try to receive the

WWVB signal at each of the even numbered hours: 0:00, 2:00, 4:00, 6:00 …

20:00 & 22:00.

BATTERY

COMPARTMENT

FOR THE

DIGITAL CLOCK

BATTERY

COMPARTMENT

EASTERN TIME

MOUNTAIN TIME

DST ON/OFF BUTTON

MANUAL TIME

SET

BUTTON

BATTERY

COMPARTMENT

FOR THE

ANALOG CLOCK

Produkt Specifikationer

Mærke:	La Crosse Technology
Kategori:	Ur
Model:	WT-3145U

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