La Crosse Technology Radio Controlled Projection Alarm WT-5110 - Manual (Page 8)

8
III. FEATURES & OPERATIONS
A. FEATURES
1. Radio-controlled
time
2. Projection of time
3. LED backlight
4. Display of indoor temperature/humidity or alarm time
5. Time alarm
B. RADIO-CONTROLLED TIME
1. The projection alarm will automatically search for the time signal upon initial set-up
and every night.
2. When the signal is being received, there will be a “tower” icon flashing to the left of the
time display.
3. When the time signal has been received successfully, the tower icon will remain
steady until midnight.
4. The NIST (National Institute of Standards and Technology—Time and Frequency
Division) WWVB radio station 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 projection
alarm.
5. Due to the nature of the Earth’s Ionosphere, reception is very limited during daylight
hours. The projection alarm will search for a signal every night when reception is best.
6. The WWVB radio station receives the time data from the NIST Atomic clock in
Boulder, Colorado. A team of atomic physicists is continually measuring 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.
7. For more detail, visit http://www.boulder.nist.gov/timefreq.htm. To listen to the NIST
time, call (303) 499-7111. This number will connect you to an automated time,
announced at the top of the minute in “Coordinated Universal Time”, which is also
known as Greenwich Mean Time (GMT). This time does not follow Daylight Saving
Time changes. After the top of the minute, a tone will sound for every second.
8. It is possible that your projection alarm may not be exactly on the second due to the
variance in the quartz. However, the clock will adjust the quartz timing over the course
of several days to be very accurate; under 0.10 seconds per day.
C. PROJECTION OF TIME
1.
When plugged into an AC outlet, the projection alarm can continuously project the
time.
2. When operating on batteries alone, the projection alarm will only project when the
snooze button is pressed or the alarm is sounding.
3. The projection will auto-focus for display from three to six feet away. A dark
surrounding will be necessary to clearly see the projection.
4. The direction of the display can also be rotated 360 ° in 90° increments by pressing the
directional button. There is no display on the LCD that signifies the direction.
5. The projector case can be rotated 180 ° to further help orient the projected display.