3
INSTALL BATTERIES IN THE TRANSMITTER:
x
Remove the screws and the battery cover from the back of the transmitter with a small
screwdriver.
x
Select the channel to transmit the outdoor temperature.
x
NOTE
: if using more than one transmitter, set each transmitter to a different channel to be
displayed on the atomic clock.
x
Insert two fresh AAA alkaline batteries into the transmitter, observing the correct polarity
(see marking inside battery compartment).
x
Keep transmitter 5-10 feet from the atomic clock.
x
Select Fahrenheit or Celsius for the transmitter display.
x
After the batteries are inserted, press the TX button on the back of the transmitter to send a
signal to the clock.
x
In order to ensure sufficient 434 MHz transmission, the outdoor transmitter should be placed
a distance of no more than 100 feet (30 meters, open air) from the Atomic clock.
INSTALL BATTERIES IN THE ATOMIC CLOCK:
x
Remove the battery cover from the atomic clock:
x
Insert a finger in the rounded depression at the bottom of the battery cover.
x
Lift up and pull out to remove battery cover.
x
Install three fresh AA alkaline batteries according to the polarity markings.
x
Replace battery cover.
x
Once the batteries are in place, all segments of the LCD will light up briefly. The time will be
Channel Selection
C/F Selection
Battery Cover
TX Button
Battery Compartment
4
displayed, as 12:00 and the outdoor temperature area will flash, searching for the
temperature transmitter(s).
x
After the batteries are inserted in the clock, press the TX button on the back of the
transmitter to send a signal to the clock.
x
Within 3 minutes the outdoor temperature should be displayed on the atomic clock. If
temperature does not show after 3 minutes, remove the batteries from both units for 60
seconds and start again from the beginning.
WWVB RADIO CONTROLLED TIME
The NIST radio station, WWVB, is located in Ft. Collins, Colorado and transmits the exact time
signal continuously throughout the United States at 60 kHz. The signal can be received up to
2,000 miles away through the internal antenna in the atomic clock. However, due to the nature of
the Earth’s Ionosphere, reception is very limited during daylight hours. The atomic clock will
search for a signal every night when reception is best. The WWVB radio station derives its signal
from the NIST atomic clock in Boulder, Colorado. A team of atomic physicists continually
measures every second of every day to an accuracy of ten billionths of a second a 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 transmitter.
Battery compartment
Foldout stands
Wall mount hole
Function buttons
Time Zone Map
(four time zones)
