La Crosse Technology WS-8147U-IT - Manual (Page 2)

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BATTERY REPLACEMENT:
For best performance, batteries should be replaced at least once a year to maintain the best
running accuracy. Ensure that the batteries used are new and the correct size.
Please help in the preservation of the environment and return used batteries
to an authorized depot.
SETUP:
Alkaline batteries are recommended for use in both units.
NOTE: Do not set the clock until the outdoor temperature is displayed.
1. Place batteries in the outdoor transmitter first, then into the radio-controlled clock. DO
NOT PRESS ANY BUTTONS FOR 30 MINUTES.
2. After 15 minutes both the Indoor and Outdoor areas on your clock should have a
temperature showing. If not, remove both sets of batteries, wait 15 minutes and repeat
step one.
3. After 15 minutes have elapsed, the WWVB time code reception will automatically start.
This reception typically takes 10 minutes in good conditions. If after 10 minutes the
WWVB time has not been received, use the “SET” key to enter the set-up mode to
manually set the Time, Time Zone and Date (see manual settings below). The clock will
continue to search for WWVB each hour between 12am and 6am When the clock has
successfully connected with WWVB, it will override the manually set time and date.
Note: When changing batteries, ensure that the batteries do not spring free from the contacts.
Press any button 20 times with the batteries removed. Always wait at least 10 minutes after
removing batteries before reinserting, otherwise start up and transmission problems may occur.
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
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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.
After 15 minutes the WWVB tower icon in the clock display will start flashing in the top center of
the LCD. This indicates the clock has detected a radio signal and is trying to receive it. When
the time code is received, the WWVB tower becomes permanently lit and the time will be
displayed.
If the tower icon flashes, but does not set the time or the WWVB tower does not appear at all,
then please take note of the following:

Recommended distance from any interfering sources like computer monitors or TV sets is
a minimum of 6 feet (2 meters).
 Within ferro-concrete rooms (basements, superstructures), the received signal is naturally
weakened. In extreme cases, please place the unit close to a window and/ or point its
front or back towards the Fort Collins, Colorado, transmitter.
 During nighttime, the atmospheric disturbances are usually less severe and reception is
possible in most cases. A single daily reception is adequate to keep the accuracy
deviation below 1 second.
Note: In case the atomic clock is not able to detect the WWVB-signal (disturbances,
transmitting distance, etc.), the time can be manually set (please refer to notes on Manual time
setting).
FUNCTION KEYS
The radio-controlled clock has four easy to use keys:
SET key
: To enter into the set mode for the following functions: time zone, DST
ON/OFF (daylight saving time), hour, minute, year, month, date, weekday,
12/24 hour time format, and ºC/ ºF temperature
+ key : To toggle between the seconds, indoor, and outdoor display
To change any values in manual set mode
ALM key : To enter into the alarm set mode
To activate/deactivate the alarm
SNZ key : To activate the snooze function during alarm
To exit manual setting modes
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Indoor temperature
Weekday
Indoor humidity
LCD SCREEN DESCRIPTIONS
The radio-controlled clock's LCD is divided into 2 sections and once the batteries are inserted,
all the segments will light up briefly before displaying the information for time, date, indoor and
outdoor temperatures.
* When the signal is successfully received by the Weather Station, the icon will be switched on.
(If not successful, the icon will not be shown in LCD) So the user can easily see whether the
last reception was successful (icon on) or not (icon off).
 If the signal reception is not successful on the first frequency (915MHz) for 30 seconds, the
frequency is changed to 920MHz and the learning is tried another 30 seconds. If still not
successful the reception is tried for 30 seconds on 910MHz. This will also be done for re-
synchronization.
MANUAL SETTINGS
Note: If the radio-controlled clock has already successfully received the WWVB time
signal and displays the correct time and date, then the Manual settings can be skipped.
After completion of the above described procedures in “Setting-up” the manual setting modes
can be entered by pressing and holding the SET key for 3 seconds. The following settings can
now be programmed:
Sensor signal reception icon*
Date
WWVB time
Outdoor
temperature
Radio reception icon
Alarm icon
Low battery indicator
(atomic clock)
Low battery indicator (transmitter)
Moon phase
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 Time zone
 DST ON/OFF
 Time
 Year
 Month
 Date
 Weekday
 12/24h time
 ºC or ºF
TIME ZONE
The time zone can be set between the 0 to –12 hour or Greenwich Mean Time (GMT) range in
LCD2. To do this:
1. The time zone (LCD2) will start flashing (Default setting "-5“). Select the desired time
zone by pressing and releasing the + key.
2. Time zone setting:
-12, -11, HAW, ALA, PST, MST, CST, EST, -4, -3, -2, -1, 0, +1, +2...+12.
(Default: EST)
Press and release the SET key to enter the “DST Setting“.
DST (DAYLIGHT SAVING TIME)
1.
The ON digit will start flashing on LCD1. Set the DST ON or OFF by pressing the + key.
2. Press and release the SET key to enter the “Manual Time Setting“.
Note:
The DST default is “ON”, meaning that the WWVB will automatically change the time according
to Daylight Saving Time in the spring and fall. For areas that do not recognize DST changes
(Arizona and parts of Indiana) turn the DST “OFF”.
TIME
In case the radio-controlled clock is not able to detect the WWVB-signal (disturbances,
transmitting distance, etc.); the time can be manually set. The clock will then work as a normal
Quartz clock.