User manual LA CROSS TECHNOLOGY WT-3141B QUICK START GUIDE

[. . . ] 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. Windows facing Colorado provide the best signal. 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. [. . . ] 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 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. MANUAL TIME SET OPTION · Press and hold the TIME SET BUTTON on the back of the movement continuously to set the manual time. Your clock is now working as a quartz clock and not searching for the WWVB signal. It is important to not release the button for more than 2 seconds during this time, or your clock will automatically return to the RADIO CONTROL MODE to begin searching for a WWVB signal again. If at any time your clock automatically advances to 4:00, 8:00, or 12:00, it has entered the RADIO CONTROLLED MODE and is searching for the WWVB signal. If you are trying to manually set your clock and have accidentally returned to the RADIO CONTROL MODE, you must remove the batteries, wait 2 minutes, and then reinstall the battery. The clock will advance to 4, 8, or 12 and allow you to use the MANUAL SET BUTTON. There are 2 ways to return to RADIO CONTROL MODE if your clock is manually set: 1. Remove the battery, reinstall it after 2 minutes, and start the clock again. Press the TIME SET BUTTON for more than 3 seconds. The hands will move to the 4:00, 8:00, or 12:00 o'clock position and begin searching for a WWVB signal. After successful WWVB signal is established, your clock will be set automatically and will work as a radio controlled clock. If reception of WWVB signal is not possible, your clock will switch back to the QUARTZ MODE after 10 minutes and show the quartz time. This movement is now functioning as a quartz clock and will not attempt to receive the WWVB signal again, unless you remove the batteries or press the TIME SET BUTTON again as described above. WARRANTY INFORMATION La Crosse Technology, Ltd provides a 1-year limited warranty on this product against manufacturing defects in materials and workmanship. This limited warranty begins on the original date of purchase, is valid only on products purchased and used in North America and only to the original purchaser of this product. [. . . ] LA CROSSE TECHNOLOGY, LTD WILL NOT ASSUME LIABILITY FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE, OR OTHER SIMILAR DAMAGES ASSOCIATED WITH THE OPERATION OR MALFUNCTION OF THIS PRODUCT. THIS PRODUCT IS NOT TO BE USED FOR MEDICAL PURPOSES OR FOR PUBLIC INFORMATION. This warranty gives you specific legal rights. You may also have other rights specific to your State. [. . . ]