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Idiomas disponibles
TABLE OF CONTENTS
Topic
Inventory of Contents/ Additional Equipment
About WWVB
Daylight Saving Time (DST) Setting
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INVENTORY OF CONTENTS
1. WT-5120 Alarm Clock
2. TX6U Remote temperature transmitter
3. AC adapter/transformer
4. Instruction manual and warranty card.
ADDITIONAL EQUIPMENT (not included)
1. Two fresh 1.5V AA batteries (optional for projection alarm clock)
2. Two fresh 1.5V AA batteries (for remote temperature sensor)
FEATURES OF PROJECTION ALARM
Operation of these features is in section III
1. Radio-controlled time
2. Projection of time and/or remote temperature
3. LED backlight
4. Display of indoor temperature/humidity or alarm time
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Topic
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5
Projection
6
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13
Troubleshooting
14
Warranty and Contact Information
5. Indoor temperature and humidity
6. Remote outdoor temperature
7. Time alarm
ABOUT WWVB (Radio Controlled Time)
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. However, 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.
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, mea-
suring a second as 9,192,631,770 vibrations of a Cesium-133 atom in a vacuum. 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
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