La Crosse Technology WS-9711U-IT Instruction Manual page 3

IMPORTANT:
Transmission problems will arise if the setting for additional sensors is not followed as
described above. Should transmission problems occur, it is necessary to remove the
batteries from all units and start the setup again from step 1.
Note: Daily WWVB reception (Atomic time) is attempted at the top of each hour between
12:00 am to 6:00 am. If the reception is successful, there is no reception attempt until the
following day. When this is successful, the received time will override the manually set time.
The date is also updated with the received time. (Please also refer to the notes on "WWVB
Radio Controlled time" and "Manual Time Setting")
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 Wireless Weather Station. However, due to
the nature of the Earth's ionosphere, reception is very limited during daylight hours. The
Wireless Weather Station 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, measuring a second as 9.192.631.770 vibrations of a Cesium-133
atom in a vacuum. This atomic clock regulates the WWVB transmitter.
INSTALL OR REPLACE BATTERIES IN THE TEMPERATURE TRANSMITTER
The Temperature Transmitter uses 2 x AA, IEC LR6 and a 1.5V battery.
To install or replace the batteries, please follow the steps below:
1. Remove the battery compartment cover at the back of the
transmitter.
2. Insert the batteries, observing the correct polarity (see marking).
3. Replace the battery compartment cover on the unit.
Note:
When changing batteries in any of the units, all units need to be reset
by following the setup procedures. This is because a random security
code is assigned by the transmitter at start-up and this code must be received and stored by
the Weather station in the first 3 minutes of power being supplied to it.
BATTERY CHANGE:
It is recommended to replace the batteries in all units regularly to ensure optimum accuracy
of these units (Battery life See Specifications below).
Please participate in the preservation of the environment. Return used
batteries to an authorized depot.
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Note: If the WWVB tower icon flashes on the top left of the LCD, but does not set the time
or the tower does not appear at all, then please note the following:

Recommended distance from any interfering sources like computer monitors or TV
sets is a minimum of 6 feet (2 meters).

With 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.

In case the Weather Station is not able to detect the WWVB-signal (disturbances,
transmitting distance, etc.), the time can be manually set (please refer to the notes on
Manual time setting).
INSTALL OR REPLACE BATTERIES IN THE WEATHER STATION
The Weather Station uses 2 x AA, IEC LR6, 1.5V batteries. To install or replace the
batteries, please follow the steps below:
1. Remove the cover at the back of the Weather Station.
2. Insert batteries observing the correct polarity (see
marking).
3. Replace compartment cover.
FUNCTION KEYS:
Weather Station:
SET key
MIN/ MAX key
SET:
This key is used to:

Enter the set mode for the following functions: LCD contrast, Time zone, Daylight
saving time ON/OFF, Time Reception ON/OFF, 12/24 hour display, Manual time,
Year, Month, Date, Sunrise/ Sunset city location, Snooze time duration, °F/°C, and
Weather forecast sensitivity settings.

Toggle between the display of "Weekday + date + month", "Second", "Alarm time",
and "Date + month + year".
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SNOOZE/ SUN key
ALM key
CH/ + key
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