La Crosse Technology WT-5120 User Manual

WT-5120

433 MHz

Radio Controlled Projection Alarm

Instruction Manual

TABLE OF CONTENTS

Topic Page

Inventory of Contents/ Additional Equipment 3
About WWVB 3
Quick Set-Up Guide 4

Detailed Set-Up Guide
Battery Installation 5
Program Mode
Programming Sequence 6
Function Buttons 6
Manual Time Setting 6
Time Zone Setting 6-7
Daylight Saving Time (DST) Setting 7

Features & Operations
Features 8
Radio-Controlled Time 8
Projection 8
EL Backlight 9
Indoor Temperature 9
Indoor Humidity 9
Remote Temperature 9
Time Alarm 10
Changing Display Mode 10
Mounting 11
Maintenance & Care 11
Troubleshooting 12
Specifications 13
Warranty and Contact Information 14-15

2

INVENTORY OF CONTENTS

ADDITIONAL EQUIPMENT (not included)

FEATURES OF PROJECTION ALARM

Operation of these features is in section III

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 projection alarm. However, due to the nature of the Earth’s Ionosphere,
reception is very limited during daylight hours. The projection alarm 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. For more detail, visit
http://www.boulder.nist.gov/timefreq.htm. To listen to the NIST time, call [phone]. This number
will connect you to an automated time, announced at the top of the minute in “Coordinated Universal
Time”, which is also known as Greenwich Mean Time (GMT). This time does not follow Daylight
Saving Time changes. After the top of the minute, a tone will sound for every second. It is possible
that your projection alarm may not be exactly on the second due to the variance in the quartz.
However, the clock will adjust the quartz timing over the course of several days to be very accurate;
under 0.10 seconds per day.

1) WT-5120 Alarm Clock

2) TX6U Remote temperature sensor

3) AC adapter/transformer

4) Instruction manual and warranty card.

1) Two fresh 1.5V AA batteries (optional for projection alarm clock)

2) Two fresh 1.5V AA batteries (for remote temperature sensor)

1. Radio-controlled time

2. Projection of time and/or remote temperature

3. EL backlight

4. Display of indoor temperature/humidity or alarm time

5. Indoor temperature and humidity

6. Remote outdoor temperature

7. Time alarm

3

QUICK SET-UP GUIDE
Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries.

1. Have the projection alarm and remote temperature sensor 3 to 5
apart.

2. Batteries should be out of both units for 10 minutes.

3. Place the batteries into the remote temperature sensor first then

into the projection alarm.

4. DO NOT PRESS ANY BUTTONS FOR 15 MINUTES.

In this time the display and sensor will start to talk to each other and the display
will show both the indoor temperature/humidity and an outdoor temperature. If
the station does not display both temperatures and indoor humidity after the 15
minutes please retry the set up as stated above. After both indoor and outdoor
temperatures are displayed for 15 minutes you can place your sensor outdoors
and set your time.

The remote sensor should be placed in a dry, shaded area. The remote sensor
has a range of 80 feet. Any walls that the signal will have to pass through will
reduce distance. An outdoor wall or window will have up to 20 feet of resistance
and an interior wall will have up to 10 feet of resistance. Your distance plus
resistance should not exceed 80 ft. in a straight line.

NOTE: Fog and mist will not harm your remote sensor but direct rain must be

avoided.

To complete the set up of your temperature station after the 15 minutes have
passed please follow the steps beginning on page 6.

4

B

DETAILED SET-UP GUIDE

II.

BATTERY INSTALLATION
A. REMOTE TEMPERATURE SENSOR

1. Remove the battery cover.

2. Observing the correct polarity, install 2 AA batteries. The
batteries will fit tightly (to avoid start-up problems make
sure that they do not spring free during installation).

3. Replace the battery cover.

B. PROJECTION ALARM

1. Remove the battery cover.

2. Observe the correct polarity, and install 2 AA batteries.

3. In addition or instead of inserting batteries, the AC adapter can be used. Simply plug
the adapter into the receptacle on the
underneath of the alarm clock and then plug
in adapter.

4. Replace the battery cover.

5. The projector will activate and remain on if
the alarm clock is plugged in. If only batteries
are used, the projector will only be activated
when a button is pressed. The projection is a
red light, not harmful under normal usage,
although care should be taken to not look
directly into the light.

Notes:

• After the batteries have been installed a tone will sound, and the LCD (Liquid

Crystal Display) will activate.

• The indoor temperature/humidity and the remote temperature will be displayed.

Also, the time will appear as “-:--”.

• The WWVB search is automatically initiated, and a tower icon appears and

flashes with the time colon (no tower icon will appear if the WWVB is too weak to
be detected, and the time display will remain on “-:--”).

• While the WWVB search is being conducted various numbers will appear in the

time display.

• After 15 minutes, the projection alarm will either display the WWVB time, or

discontinue the search if the time is not found. If the search is cancelled “-:--” will
remain in the time LCD.

• The projection alarm will conduct a WWVB search every hour until the first signal

is found.

• Once the WWVB time is found, a search is automatically conducted nightly at

midnight.

• If the signal is found at midnight, the tower icon will remain, if not, another search

will take place every hour (until 6:00 am) until the signal is found successfully.

• If no signal is found during this period, the tower icon will not appear and the

clock will search again at 12:00 am the next night.

• The radio-controlled time receiver is located on the bottom side of the projection

alarm. When using the AC adaptor be sure to keep the adapter cord away from
the bottom side of the unit as if the wire is too close it can cause weakened
reception sensitivity.

attery

Cover

AC adapter
receptacle

5