La Crosse Technology WT-3123A Manual

La Crosse Technology Vækkeur WT-3123A

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Side 1/2
La Crosse Technology
Radio Controlled
Analog Clock
OWNER’S MANUAL
Quick set up instructions
Welcome to the world of radio controlled 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 fresh AA, LR6
1.5 volt ALKALINE battery
• Press button to select a time zone. THAT’S IT! During the night your clock will
automatically set itself.
For a better understanding of how and why your clock works please continue reading.
Nothing is more precisely measured than time!
And nothing keeps track of time more precisely and trouble free than La Crosse Technology radio controlled clocks.
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 longwave 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 radio controlled clocks always keep precise time. The changeover from
standard time to daylight savings time, and vice versa, takes place automatically with the same precision.
Additional details
To set up your clock simply install one fresh 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. 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. The time zone
buttons may be pressed any time after installing the batteries. 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. Another time zone can be selected during or after the
clock has set itself. 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.
When the battery is installed the second hand will advance eight seconds (two seconds per step x four steps). The clock is now
searching for a signal. For the initial setting it is recommended to stand the clock in an upright position near a window. Within five
minutes the clock will either receive the WWVB signal and set itself to the exact time, or it will determine that the signal is not
receivable at its current location and time of day. If a signal is not receivable it will fast-forward the hands to the 4, 8, or 12 o’clock
position and search for WWVB each hour until a signal is received.
If the time is manually set the clock will continue to peri
odically
search for a signal and automatically reset the hands when the signal is received.
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 providing the best signa
l.
The WWVB time signal will easily penetrate Masonry and wood framed buildings. WWVB will penetrate almost every residential
building and most steel buildings if they have adequate windows. It is not possible, however, for WWVB 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 is exposed to the WWVB signal it will automatically set the
hands to the exact time.
La Crosse Technology clocks do not receive or process radio c any’s DCF 77, Japan’s J Ga AS, ontrolled time signals from Germ
or England’s MSFs atomically regulated transmitters. La Crosse Technology clocks can be manually set and used anywhere.
For more information on the NIST and radio controlled time, see www.boulder.nist.gov/timefreq/
Troubleshooting
The wonderful advantage of owning a La Crosse Technology radio controlled clock is that it is virtually trouble free. If the clock receives a
clear signal it will set itself perfectly. If it does not receive a signal consider the following:
Battery - The La Crosse Technology clock must have a fresh battery to receive and process the time signal.
Location - Try a different location, ideally near a window. It should be at TVs, air conditioners, other least six feet from computers, Radio-
Controlled clocks and other electrical appliances that cause interference.
Weather - Electrical storms between you and Colorado during the night will interfere with the WWVB signal.
Although we cannot control the weather we can help you predict it (see www.lacrossetechnology.com).
Daylight Savings Time
The National Institute of Standards and Technology and WWVB encode a special DST “bit” in the WWVB transmission for DST. Your La
Crosse Technology clock will read this information and autom in the fall. atically advance the hands one hour in the spring and eleven hours
Arizona and Indiana
If you live in an area that does not recognize DST you must press the (unmarked) DST button for one second to deactivate your clock’s DST
program. To reactivate the DST program simply press the DST button again for one second.
Frequently Asked Questions
Q. How long will the battery last?
A. A good AA alkaline battery will last over one year. If your clock is located in an area with little interference where it can quickly receive a
signal the battery will last much longer than one year.
Q. Can a La Crosse Technology clock be used outdoors?
A. Yes, but only in a dry environment and in a temperature range between 41 F and 131 F. The clock is NOT water-resistant.
Q. Can the La Crosse Technology clock be wired to control timing circuits?
A. No.
Q. Why does the second hand move only once every two seconds, but it moves two seconds per step? it moves two seconds per
A. When the battery drops below 1.25 volts the clock indicates that it is time to change the battery by advancing the second hand in two
second steps. The operating voltage range is 1.25 to 1.75 volts.
Warranty
La Crosse Technology warrants this clock to be free of any defect in workmanship or materials for a period of one year after the date of
purchase. You should notify La Crosse Technology promptly in writing or by e-mail in the event of any defect covered by this warranty. When
requesting warranty service you must provide evidence of the date of purchase.
This warranty does not cover the clock’s inability to receive a signal due to interference, whatever may be the source of that interference. In
addition, this warranty does not cover any defects resulting from improper use, unauthorized repairs, or faulty batteries.
In the event of a warranted problem please return the clock postage prepaid to the address below. La Crosse Technology will repair or
replace your clock with the same or similar model free of charge. La Crosse Technology, Ltd. will pay ground return shipping charges to the
owner of the product to a USA address only.
LA CROSSE TECHNOLOGY WILL NOT ASSUME LIABILITY FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR OTHER SIMILAR
DAMAGES ASSOCIATED WITH THE OPERATION OR MALFUNCTION OF THIS CLOCK.
This warranty gives you specific legal rights. You may also have other rights specific to your state. Some states do not allow the exclusion of
consequential or incidental damages so the above exclusion of limitation may not apply to you.
1116 South Oak Street
La Crescent, MN 55947
www.lacrossetechnology.com
507.895.7095 (ph)
507.895.8000 (fax)

Produkt Specifikationer

Mærke: La Crosse Technology
Kategori: Vækkeur
Model: WT-3123A

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