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Battery 
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INSTANT TRANSMISSION

 is the state-of-the-art 

new wireless transmission technology, 
exclusively designed and developed by  
LA CROSSE TECHNOLOGY. 

INSTANT

TRANSMISSION

 offers you an immediate update 

(every 4 seconds!) of all your outdoor data 
measured from the transmitters: follow your 
climatic variations in real-time!

 

WS-8117U-IT 

RADIO-CONTROLLED CLOCK WITH WIRELESS OUTDOOR 

TEMPERATURE AND MOON PHASE 

Quick setup manual 

Introduction 

The Radio-Controlled Clock provides precise time, date, moon phase,  

and outdoor temperature on one easy to read display.

FEATURES: 
ATOMIC CLOCK: 

 

Function 
buttons 

This product offers: 

Foldout 
stand 

LCD 1 

LCD 2 

2

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WWVB Radio controlled time and date with manual time setting 

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12-hour or 24-hour time display selectable 

x

 

Time display 2” tall: hour, minute (seconds optional in lower LCD) 

x

 

Calendar display 

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Weekday display (4 languages: English, French, Spanish, and German (deutch) 

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Alarm setting with snooze function 

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Current moon phase display 

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Time zone setting (GMT +12 to –12) 

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Daylight savings time ON/OFF option (DST) 

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ºF or ºC temperature display selectable  

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Indoor temperature display 

x

 

Outdoor temperature display via 915MHz transmission 

x

 

Wall mount or freestanding

 

x

 

Low battery icon for receiver (RX) and transmitter (TX). 

 

INITIAL SET UP 

Install batteries

: Install batteries into the sensor first. 

x

 

The sensor uses 2 x AA, batteries (IEC LR6, 1.5V). To install and replace 
the batteries, please follow the steps below: 

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Remove the battery cover from the back of the sensor. 

x

 

Insert the batteries, observing the correct polarity inside battery 
compartment. 

x

 

Replace the battery cover on the unit.

 

Next

install batteries into the clock. 

x

 

The Atomic Clock uses 2 x AA batteries (IEC LR6, 1.5V). 

x

 

Insert batteries into the Wall Clock, observing the correct 
polarity (see markings inside battery compartment). 

x

 

Replace the battery cover. 

x

 

Manually Set Time and Date or wait for WWVB signal. 

NOTE

: Default Time Zone is Eastern. 

 

Alkaline batteries are recommended for use in both units. Avoid using rechargeable 
batteries. Do Not Mix Old and New Batteries. Do Not Mix Alkaline, Standard, or 
Rechargeable Batteries. 

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Allow the sensor and the clock to sit 5-10 feet apart for 15 minutes after installing batteries to lock 
in the Temperature signal. After 15 minutes mount the sensor outside. 

 

NOTE

:  

After the sensor and clock have been operating for awhile, if the temperature signal goes to 
dashes, bring the sensor in the house, remove batteries from the sensor and the clock for 15 
minutes and set up again.

 

915MHZ RECEPTION CHECK FOR OUTDOOR TEMPERATURE TRANSMITTER 

The radio-controlled clock will receive the temperature data within 4 seconds. If the temperature 
data is not being received 2 minutes after setting up (or the display shows “- - -”), then please 
check the following points: 

 

1. 

The distance of the radio-controlled clock or outdoor temperature transmitter should be at 
least 6 feet (2 meters) away from any interfering sources such as computer monitors, 
cordless phones or TV sets. 

2. 

Avoid placing the receiver onto or in the immediate proximity of metal window frames. 

3. 

Using other electrical products such as headphones or speakers operating on the same 
signal frequency (915MHz) may prevent correct signal transmission and reception. 

4. 

Neighbors using electrical devices operating on the 915MHz signal frequency can also 
cause interference. 

NOTE:

When the 915 MHz signal is received correctly, do not re-open the battery cover of either the 
outdoor temperature transmitter or radio-controlled clock, as the batteries may spring free from the 
contacts and force a false reset. Should this happen accidentally then remove batteries for all 
units for 15 minutes, otherwise transmission problems may occur. Follow 

Initial Set-up

 

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. 

 

Once the outdoor temperature is displayed on the atomic clock, the WWVB tower icon in the clock 
display will start flashing in the top center of the LCD. This indicates that 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: 

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Recommended distance to any interfering sources like computer monitors or TV sets is a 
minimum of 6 feet (2 meters). 

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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. 

x

 

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 SET TIME). 

 

SET TIME

Hold SET button for 5 seconds, to enter the time set mode. 

 

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TIME ZONE 

(GMT +12 to –12):  The Time Zone will flash a number following by the letter h.  

Use the PLUS to change the Time Zone. North American Time Zones are 

negative 

numbers 

and will show letters: -4h ATL, -5h EST, -6h CST, -7h MST, -8h PST, -9h ALA and 

-10h HAW.  Press and release the SET button once. 

    

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DAYLIGHT SAVING TIME:

  DST will show ON or OFF flashing.   Most states observe DST, 

so this should be set to ON.  However if your location does not observe DST, use the PLUS 
button to turn it OFF.  Press and release the SET button once. 

 

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LANGUAGE:

  Select from 

US

(English), F (French), E (Spanish), or d (Deutsch).  The day 

of the week will display in the selected Language.   

x

 

HOUR:

  The Hour will flash.  Use the PLUS button to set the Hour.  If using 12-hour Time 

Mode, be sure to set the Hour for am or pm.  Press and release the SET button once. 

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