La Crosse Technology WT-3131A User Manual

Radio-controlled Analog Clock

TABLE OF CONTENTS

Topic Page

Inventory of Contents/Additional Equipment 2
About WWVB 2

Detailed Set-Up Guide

Battery Installation 2
Function Keys 3
Time Zone Setting 3
Daylight Saving Time Setting 3
Features
Weather Forecast Icons 4
Indoor Temperature and Humidity 5
Mounting 5
Troubleshooting 5
Maintenance & Care 5
Specifications 6
Warranty Information 7-8

WT-3131A

With Weather Forecast

Instruction Manual

INVENTORY OF CONTENTS

1. Radio-controlled analog clock with weather forecast

2. Instruction manual and warranty card

ADDITIONAL EQUIPMENT (not included)

1. One AA alkaline battery

2. Two AAA alkaline batteries

3. One screw for wall mounting clock

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 clock. However, due
to the nature of the Earth’s Ionosphere, reception is very limited during daylight hours.
The 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 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. For more information about WWVB please see the NIST website at
http://www.boulder.nist.gov/timefreq/stations/wwvb.htm

DETAILED SET UP GUIDE

1. Battery Installation

There are two locations for batteries on the clock

a. The analog clock requires one AA battery for operation
b. The battery is inserted on the back of the clock above the four time zone

buttons.

c. After the battery is inserted press the desired time zone button.

d. The weather LCD requires two AAA batteries for operation.
e. The battery compartment is located directly above the “SET ºC/ºF” button

on the back of the clock.

Note: Ensure that the correct polarity is followed when inserting the batteries
into each location.

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2. Function Keys

There are six buttons on the back of the clock.

a. The time zone buttons are labeled “PT”, “MT”, “CT” and “ET”. These

buttons are directly above the AA battery slot for the clock.

b. In between the “CT” and “ET” buttons is the DST (Daylight Saving

Time) over ride button. Pressing this button will disable/enable the DST
recognition of the clock

c. There is a black manual time set button located directly above the AA

battery slot for the clock. By holding this button down you are able to
manually set the time on your clock.

d. The last button is the “SET ºC/ºF” button, which is located below the

AAA battery compartment. Press and release this button to switch
between ºC and ºF.

3. Time Zone Setting

Press and release one of the four time zone buttons on the back of the clock to
select your desired time zone. The clock will automatically adjust to the correct
time for that zone.

4. Daylight Saving Time (DST) Setting

Press and release the daylight saving time button to deactivate or reactivate the
daylight saving time recognition feature of the clock.

Note: Some locations (Arizona and parts of Indiana) do not follow Daylight
Saving Time.

There is no indication of the mode the daylight saving time feature is in the
factory setting is ON.

FEATURES

1. Weather Forecast

The weather forecasting feature is estimated to be 75% accurate. The weather
forecast is based solely upon the change of air pressure over time. The WT-3131A
averages past air-pressure readings to provide an accurate forecast, creating a
necessity to disregard all weather forecasting for 12-24 hours after the unit has
been set-up, reset, or moved from one altitude to another (i.e. from one floor of a
building to another floor). In areas where the weather is not affected by the
change of air pressure, this feature will be less accurate.

a. Weather Icons

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