ATOMIC TIME AND WWVB SIGNAL
The NIST (National Institute of Standards and Technology) radio station is located in Ft. Collins Colorado. It transmits an exact time signal continuously throughout the continental United States at
60 KHz frequency. The Atomic Projection Clock with Temperature can receive this WWVB signal through its internal antenna from up to 2,000 miles away. Due to the nature of the Earth’s ionosphere, reception can be limited during the daylight hours. The radio
INDICATOR | STANDING FOR | INDICATOR | STANDING FOR |
| RADIO SIGNAL | ZZ | REPEAT ALARM INDICATION |
DATE | DATE | MONTH | MONTH |
| TIME ZONES |
| MOONPHASE |
PM | PM (12 HR DISPLAY ONLY) |
| DEGREE CELSIUS |
AM | AM (12 HR DISPLAY ONLY) |
| DEGREE FAHRENHEIT |
1 | ALARM 1 | 2 | ALARM 2 |
controlled clock will search for an alternate station that derives its signal from the NIST Atomic clock in Boulder, Colorado.
The WWVB tower icon on the main unit’s display will flash indicating radio signal reception from the WWVB station. If the tower icon is not fully lit, or if the time is not set automatically, please consider the following:
* During |
severe and reception may be improved. A single daily reception is |
sufficient enough to keep the clock accuracy reading within 1 second. |
* Make sure the main unit is positioned at 8 feet minimum distance |
GETTING STARTED
*After batteries are installed, the WWVB time signal receiver will automatically search for the time signal. This will take about 5 – 8 minutes. Always place clock by the window for better reception.
*If the radio signal is received, the date and time will be set automatically and the icon [
] will appear.
AM
PM
ZZ
MONTH | DATE | YEAR | ALARM 1 ALARM 2 |
|
| AM | 1 |
|
| PM | |
|
|
| 2 |
AM
PM
ZZ 
MONTH | DATE | YEAR | ALARM 1 ALARM 2 |
|
| AM | 1 |
|
| PM | |
|
|
| 2 |
from any interference source such as a TV, computer monitor, |
microwave, etc. |
* The successful reception of the atomic time signal depends on the |
positioning and location of the clock. Always place the main unit |
by the window for better reception. |
* Within concrete wall rooms such as basements or office buildings, |
the received signal may be weakened. Always place the unit |
near the window. |
*If after 8 minutes the time signal has not been received, press the “MODE” button to set the time manually. The clock will continue to search for the WWVB time signal daily from 1:00am to 4:30am. When the signal has been successfully received, the time and date will be updated automatically.
