La Crosse Technology 512A-811 User Manual

512A-811 and 512B-811

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Atomic Di

The Atomic Digital Clock with Weather Forecast offers radio-controlled time, pressure history,

weather forecast, and indoor and outdoor temperature on one easy to read display.

ital Clock with Weather Forecast

Manual

Introduction

WWVB Snooze icon
Rece

tion

Time

Alarm icon

Forecast icon

Barometric Date Indoor
Pressure Temperature
History

Outdoor Temperature

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FEATURES:

x Four digit time display (3 inches high)
x Atomic time and date with manual set option
x Automatically updates for Daylight Saving Time (on/off option)
x Choose from 5 languages (English, German, French, Dutch, Spanish).
x Choose from 4 Time Zones (Eastern, Central, Mountain, Pacific).
x 12-hour or 24-hour selectable time
x 18-hour pressure history graph.
x Forecast icons: sunny, partly cloudy, cloudy, rainy and stormy.
x Daily Alarm
x Perpetual calendar.
x Indoor temperature (°F or °C)
x Outdoor temperature (°F or °C)
x Can read up to 3 outdoor transmitters
x Wall hanging or free standing
x Low battery indicator for receiver and transmitter
x 100 foot wireless transmission range (open air)

SET UP:

x Remove the screws and the battery cover from the back of the transmitter with a small

screwdriver. (see install batteries in transmitter).

x Set the transmitter to Channel 1.
x NOTE: if you have additional transmitters set them to channel 2 and channel 3 respectively.
x Insert fresh alkaline batteries into the transmitter, observing the correct polarity (see marking

inside battery compartment). Keep the transmitter 5-10 feet from the atomic clock.

x Select Fahrenheit or Celsius for the transmitter display.
x Insert batteries into the atomic clock, observing the correct polarity (see install batteries

into the atomic clock). Once the batteries are in place, all segments of the LCD will light up
briefly. The time will be displayed, as 12:00 and the outdoor temperature area will flash,
searching for the temperature transmitter(s).

x After the batteries are inserted in the clock, press the TX button on the back of the

transmitter to send a signal to the clock.

x Within 3 minutes the outdoor temperature should be displayed on the atomic clock. If

temperature does not show after 3 minutes, remove the batteries from both units for 60
seconds and start again from the beginning.

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INSTALL BATTERIES IN THE TRANSMITTER:

(

)

x Remove the screws and the battery cover from the back of the transmitter with a small

screwdriver.

x Select the channel to transmit the outdoor temperature.
x NOTE: if using more than one transmitter, set each transmitter to a different channel to be

displayed on the atomic clock.

x Insert two fresh AAA alkaline batteries into the transmitter, observing the correct polarity

(see marking inside battery compartment).

x Keep transmitter 5-10 feet from the atomic clock.
x Select Fahrenheit or Celsius for the transmitter display.
x After the batteries are inserted, press the TX button on the back of the transmitter to send a

signal to the clock.

x In order to ensure sufficient 434 MHz transmission, the outdoor transmitter should be placed

a distance of no more than 100 feet (30 meters, open air) from the Atomic clock.

C/F Selection

TX Button

Battery Compartment

Channel Selection

Battery Cover

INSTALL BATTERIES IN THE ATOMIC CLOCK:

x Remove the battery cover from the atomic clock:

x Insert a finger in the rounded depression at the bottom of the battery cover.

x Lift up and pull out to remove battery cover.
x Install three fresh AA alkaline batteries according to the polarity markings.
x Replace battery cover.
x Once the batteries are in place, all segments of the LCD will light up briefly. The time will be

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displayed, as 12:00 and the outdoor temperature area will flash, searching for the

temperature transmitter(s).
x After the batteries are inserted in the clock, press the TX button on the back of the

transmitter to send a signal to the clock.
x Within 3 minutes the outdoor temperature should be displayed on the atomic clock. If

temperature does not show after 3 minutes, remove the batteries from both units for 60

seconds and start again from the beginning.

Wall mount hole

Time Zone Map

four time zones

Function buttons

Battery compartment

Foldout stands

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
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.

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

x Recommended distance to any interfering sources like computer monitors or TV sets is a

minimum of 6 feet (2 meters).

x 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).

WWVB RECEPTION icon with full signal strength will appear on screen if the reception of

atomic time is successful. The atomic clock will have a daily synchronization at 02:03 and 03:03
everyday. Each reception cycle is minimum 2.5 minutes and maximum 10 minutes.

FUNCTION BUTTONS

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Press and Release Functions Hold 3-5 seconds

Zz Activates snooze when alarm sounds
CH Select CH 1, 2, 3 or auto scroll Search for transmitter

SET Set Clock

AL View alarm time. Set Alarm

++ = Advance 1 in program mode + = Fast advance

+ = Alarm on/off in AL mode WWVB Search

-- = Back 1 in program mode - = Fast backward

C/F

ZONE Select Time Zone PST>MST>CST>EST

SET TIME: The Program menu involves several sections controlled by different buttons.

Buttons are: Zz/CH, SET, AL, +/

x LANGUAGE: Hold the SET button until the Language will flash. Press and release the

PLUS button to set the Language (EN English, GE German, FR French, SP Spanish, DU

Dutch,). Press the SET button once to continue.
x YEAR: Hold the SET button until the Year will flash. Press and release the PLUS button to

set the Year. Press the SET button once to continue.
x MONTH: The Month will flash. Press and release the PLUS button to set the Month. Press

the SET button once to continue.
x DATE: The Date will flash. Press and release the PLUS button to set the Date. Press the

SET button once to continue.

x NOTE: Day of week will set automatically.
x HOUR: The Hour will flash. Press and release the PLUS button to set the Hour. Press the

SET button once to continue.

- = Alarm on/off in AL mode Switch Fahrenheit/Celsius

, -/CF, ZONE.

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