La Crosse Technology WS-7025TWC User manual

WS-7025TWC
Wireless 433 MHz
Radio-controlled Weather Station
Instruction Manual


Topic Page
Inventory of Contents/Additional Equipment 3
About WWVB 4
Quick Set-Up Guide 5
Detailed Set-Up Guide
Battery Installation 6-7
Program Mode
Function Keys 7
12/24 Hour Time Setting 7
Time Zone Setting 7-8
Daylight Saving Time Setting 8-9
Time Setting (WWVB & Manual) 9-10
Setting Day, Date and Year 10-11
Selecting °F or °C 11
Setting the LCD Contrast 11
Features
Back Light 12
Weather Forecast 12-13
Indoor Temperature, Humidity & Comfort
Level Indicator
14
Outdoor Temperatures 14
Minimum & Maximum Records (Indoor,
Outdoor & Resetting)
14-15
Alarm (Setting, Snoozing & Stopping) 16
Additional Remote Temperature Sensor
Units (Set-Up, Viewing & Operation)
17-18
Mounting 18-20
Troubleshooting 21
Maintenance & Care 22
Specifications 23
Warranty Information 24-25
Table Of Contents
2

INVENTORY OF CONTENTS
1. The weather station (Figure 1).
2. One TX6U remote temperature sensor with mounting bracket
(Figure 2).
3. Three each, ½” Philips screws.
4. One strip double-sided adhesive tape.
5. Instruction Manual and Warranty Card.
3

ADDITIONAL EQUIPMENT (not included)
1. Two, fresh AA 1.5V batteries for indoor weather station.
2. Two, fresh AA 1.5V batteries for remoter temperature sensor.
3. One, Philips screwdriver for mounting.
Time LCD
Date LCD
Forecast LCD
Indoor LCD
Outdoor LCD
Fi
g
ure 1
Mounting
Bracket
Figure 2

4
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 weather
station. However, due to the nature of the earth’s ionosphere, reception is very
limited during daylight hours. The weather station 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.

5
QUICK SET-UP GUIDE
Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries.
1. Have the indoor weather station 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 indoor weather station.
(All remote temperature sensors must be started before the indoor
weather station)
4. DO NOT PRESS ANY BUTTONS FOR 10 MINUTES.
In this time the indoor weather station and remote temperature sensor will start to
talk to each other and the indoor weather station will show both the indoor
temperature and an outdoor temperature. If the indoor weather station does not
display both temperatures after the 10 minutes please retry the set up as stated above.
After both indoor and outdoor temperatures are displayed for 10 minutes you can
place your remote temperature sensor outdoors and set your time.
The remote temperature sensor should be placed in a dry, shaded area. The remote
temperature 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 20 to 30 feet of
resistance and an interior wall will have 10 to 20 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 temperature sensor but direct rain
must be avoided.
To complete the set up of your indoor weather station after the 10 minutes have
passed please follow the steps on pages 8 and 9.
Note: The remote temperature sensor transmits a signal every 3 minutes;
after the batteries have been installed, the indoor weather station will
search for the signal for a duration of 5 minutes. If there is no temperature
reading in the OUTDOOR LCD after 5 minutes, make sure the units are
within range of each other or repeat the battery installation procedure.

DETAILED SET-UP GUIDE
I. BATTERY INSTALLATION
6
A. REMOTE TEMPERATURE SENSOR
1. Remove the mounting bracket. The
bracket snaps on and off easily.
2. Remove the battery cover, by sliding the
cover down.
3. Observing the correct polarity install 2
AA batteries. The batteries will fit
tightly (to avoid start-up problems make
sure they do not spring free).
4. Replace the battery cover by sliding
upwards. Be sure battery cover is on
securely.
B. INDOOR WEATHER STATION
1. Remove the battery cover. To
do this, insert a solid object in
the space provided at the
lower-central position of the
battery cover, then push up and
pull out on the battery cover.
2. Observe the correct polarity,
and install 2 AA batteries.
3. Replace the battery cover.
Note: Immediately after the batteries have been installed, each
LCD (Liquid Crystal Display) will flash and a tone will sound.
Within a few seconds the indoor temperature, indoor relative
humidity and the weather icons (sun and clouds) will be displayed.
If not, then remove batteries for 10 seconds and reinstall. If the
outdoor temperature is not displayed within four minutes, remove
batteries from both units, wait 10 seconds, and reinstall. The time
will show -:-- and start searching for the signal. If it successfully
Battery
Cover

receives the time signal (usually at night), it will display the
correct time (default is Eastern).
PROGRAM MODE
Programming Note: If 30 seconds are allowed to pass or either the IN or
the OUT button is pressed during programming modes, the unit will set the
last information entered—the display will stop flashing and return to
normal time-date readings. If you don’t leave the program mode during the
programming of sections III through VIII, you can advance to step 3 of the
next program setting. If you do leave the program setting (or want to
program a specific setting) follow each instructional step to program that
setting.
I. FUNCTION KEYS
The function keys are operated by pressing the top
or bottom of the key corresponding to the
operation that you want to perform.
II. 12 OR 24 HOUR TIME SETTING
1. Press and hold the “SET” button for 3 seconds or until “12 h”
flashes in the DATE LCD.
2. Press and release the “CH” button to toggle between 12 and
24-hour time.
3. Press and release the “SET” button to confirm the 12/24-hour
setting and to advance to Time Zone Setting.
III. TIME ZONE SETTING
The default time zone is EST, “-5hr” (Eastern Standard Time), to
change this setting:
1. Press and hold the “SET” button for 3 seconds or until “12 h”
OR “24 h” flashes in the DATE LCD.
2. Press and release the “SET” button 1 more time to enter the
Time Zone setting mode. The default Time Zone “-5” will
flash in the DATE LCD.
7

8
3. Select your appropriate time zone using the CH button.
During selection of the Time Zone, the 3 letter abbreviations
for the time zones found in North America will flash across
the top of the TIME LCD. Observe the chart below, showing
the corresponding abbreviations, time zones, and codes.
TIME ZONES
GMT 0
Atlantic -4
EST; Eastern -5
CST; Central -6
MST; Mountain -7
PST; Pacific -8
ALA; Alaska -9
HAW; Hawaii -10
Note: There are more time zones represented by numbers than there are
represented by 3 letter abbreviations. If you live in North America you
need only be concerned with the ones in the chart above.
4. Press and release the “SET” button to confirm and advance to
the Daylight Saving Time setting.
IV. DAYLIGHT SAVING TIME (DST) SETTING
1. Press and hold the “SET” button for 3 seconds or until “12 h”
or “24 h” flashes in the DATE LCD.
2. Press and release the “SET” button 2 more times to reach the
DST selection mode. “DST 1” is the default setting and will
be flashing in the DATE LCD.
3. Press and release the “CH” button to select “DST 0” or “DST
1.”
4. “DST 0” indicates that the feature is off and the WWVB will
not change times automatically. “DST 1” indicates that the
feature is on and the WWVB will change times automatically.
Note: Some locations (Arizona and parts of Indiana) do not
follow Daylight Saving Time and should select “DST 0.”

9
5. Press and release the “SET” button to confirm and advance to
the Time setting mode.
V. TIME
There are two methods by which the time can be set:
A) Automatically via WWVB reception or
B) Manually.
A. WWVB (Remote Control Time)
This method requires you to do nothing except wait for the signal
to be received and to select a time zone. Reception usually takes
approximately 6-10 minutes during optimal conditions. The best
conditions for reception is at night, between midnight and 6:00
AM—when there is less atmospheric interference. To keep your
time as accurate as possible, the weather station conducts a
WWVB search every night between these hours and overrides any
manually set time. The WWVB tower icon (appearing in the TIME
LCD) will flash when a signal-search is in progress, will remain
steady when the signal has been received and nothing will be
displayed in all other situations. If the WWVB time has not been
received after 10 minutes of battery installation, you may manually
set the time or leave the time function alone (reception will occur
regardless).
B. MANUAL TIME SETTING
1. Press and hold the “SET” button for 3 seconds or until “12h”
flashes in the DATE LCD.
2. Press and release the “SET” button 3 more times (until the
hour digit flashes in the TIME LCD).
3. Press and release the “CH” button to change the hour. Press
the “CH” button once and the hour will increase by one,
twice and the hour will increase by two, etc.
4. Press and release the “SET” button to confirm the hour
setting and to advance to the minute setting mode.

10
5. The minute digits should be flashing. Press and release the
"CH” button to change the minutes—increasing the minutes
by increments of 1 with each press of the “CH” button.
6. Press and release the “SET” button to confirm the minutes
and to advance to the Day, Date, and Year setting mode.
Note: In 12h mode, “PM” will appear to the left of the time
during PM hours. If the time is not within the PM hours, nothing
will be displayed. Be sure to set the time to the correct AM/PM
time to ensure automatic reception at optimal times.
VI. SETTING THE DAY, DATE, AND YEAR
1. Press and hold the “SET” button for 3 seconds, or until “12 h”
or “24 h” flashes in the DATE LCD.
2. Press and release the “SET” button 5 more times to reach the
Weekday setting mode.
Note: “MO” (representing Monday) is the default setting for the
weekday, “1.1” is the default setting for the numeric month and
day, and “1999” is the default setting for the year. The day, date,
and year will be automatically set once the WWVB signal is
received. However, the day, date, and year can be manually set
and will flash respectively in the DATE LCD during manual
programming.
3. The weekday will be flashing in the DATE LCD, press and
release the “CH” button to change the weekday.
4. Press and release the “SET” button to confirm, and to enter
the numeric-month setting mode.
5. The numeric-month will be flashing in the DATE LCD. Press
and release the “CH” button to select to the current month.
6. Press and release the “SET” button to confirm the numeric-
month, and to enter the numeric-day setting mode.
7. The numeric-day will be flashing, press and release the “CH”
button to select the current day.
8. Press and release the “SET” button to confirm and to enter the
year setting mode.

11
9. The default-year will be flashing, press and release the “CH”
to select the appropriate year.
10. Press and release the “SET” button to confirm and to advance
to the °F or °C setting mode.
VII. SELECTING °F OR °C
1. Press and hold the “SET” button for 3 seconds, or until “12h”
or “24h” flashes in the DATE LCD.
2. Press and release the “SET” button 9 times to reach the °F or
°C setting mode.
3. “°F” is the default setting, and should be flashing in the
DATE LCD.
4. Press and release the “CH” button to shift °F to °C and back.
4. Press and release the “SET” button to confirm your selection
and to advance to the LCD contrast setting.
VIII. SETTING THE LCD CONTRAST
1. Press and hold the “SET” button for 3 seconds or until “12h”
or “24h” flashes in the DATE LCD.
2. Press and release the “SET” button 10 more times to reach the
LCD contrast setting mode.
3. The default setting—“Lcd 5”—will flash in the DATE LCD.
4. There are 8 LCD contrast levels to choose from—“Lcd 0” is
the lightest and “Lcd 7” is the darkest.
5. Press and release the “CH” button to toggle through the
settings.
6. Press and release either the “IN” or “OUT” buttons to
confirm all the settings and to exit the manual-programming
mode (or wait 15 seconds for the unit to automatically return
to the normal display mode).

FEATURES OF THE WS-7025U
12
I. BACK LIGHT
The WS-7025U has a backlight that can be activated by pressing any of the
eight function buttons. After a button has been pressed the backlight will
come on for five seconds before automatically shutting off.
II. 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 WS-7025U 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.
Forecast icon
Alarm icon
Satellite icon (indicates
outdoor transmission)
WWVB Tower Icon (indicates time
reception)
Weather Tendency Arrow
Comfort Level Indicator

A. WEATHER ICONS
There are 3 possible weather icons that will be displayed in the
FORECAST LCD:
Sunny—indicates that the weather is expected to improve (not that
the weather will be sunny).
Sun with Clouds—indicates that the weather is expected to be fair
(not that the weather will be sunny with clouds).
Clouds with Rain—indicates that the weather is expected to get
worse (not that the weather will be rainy).
The weather icons change when the unit detects a change in air
pressure. The icons change in order from “sunny” to “partly
sunny” to “cloudy” or the reverse. It will not change from “sunny”
directly to “rainy”, although it is possible for the change to occur
quickly. If the symbols do not change then the weather has not
changed, or the change has been slow and gradual.
B. WEATHER TENDENCY ARROWS
Other possible displays in the FORECAST LCD are 2 weather
tendency arrows one that points up (on the left side of the LCD)
and one that points down (on the right side of the LCD). These
arrows reflect current changes in the air pressure. An arrow
pointing up indicates that the air pressure is increasing and the
weather is expected to improve or remain good. An arrow pointing
down indicates that the air pressure is decreasing and the weather
is expected to become worse or remain poor. No arrow means the
pressure is stable.
13

14
III. INDOOR TEMPERATURE, HUMIDITY, AND COMFORT
LEVEL INDICATOR
The current indoor temperature (viewed on the left) and relative humidity
(viewed on the right) are displayed in the INDOOR LCD. The comfort
level indicator is located at the center of the INDOOR LCD. The comfort
level indicator will display a happy face icon when the temperature is
between 68°F and 79°F (20°C and 25.9°C) and the humidity is between
45% and 64%. A sad face icon will be displayed when the temperature and
humidity are outside the mentioned ranges.
IV. OUTDOOR TEMPERATURE
The outdoor temperature is viewed in the OUTDOOR LCD. When there is
more than one remote temperature sensor unit in operation, a “boxed”
number will appear to the right of the temperature. This indicates which
remote temperature sensor unit (1, 2, or 3) is currently displaying its data in
the OUTDOOR LCD. (This feature is explained in further detail in section
VI—Adding Remote Temperature Sensors).
V. MINIMUM AND MAXIMUM TEMPERATURE RECORDS
The WS-7025U keeps a record of the MINIMUM and MAXIMUM
temperature and the time and date of their occurrence—for both the indoor
and outdoor modes.
A. VIEWING THE INDOOR TEMPERATURE RECORDS
1. Press the “IN” button once. “MIN” appears in the upper-
center location of the flashing INDOOR LCD indicating that
the minimum temperature, (along with the humidity measured
at that time) and the time and date of occurrence are
displayed. The minimum records will display for 20 seconds.
2. Press the “IN” button again (once while “MIN” is still
displayed, twice otherwise). “MAX” appears in the upper-
center location of the flashing INDOOR LCD indicating that
the maximum temperature, (along with the humidity measured
at that time) and the time and date of occurrence are
displayed.

15
3. While “MAX” is still displayed press the “IN” button again to
return to the current data display. By waiting 20 seconds
during either the minimum or the maximum readings the unit
will automatically return to current data readings.
B. VIEWING THE OUTDOOR TEMPERATURE
RECORDS
1. Press the “OUT” button once. “MIN” appears in the upper-
center location of the flashing OUTDOOR LCD, indicating
that the minimum temperature and the time and date of
occurrence are displayed. The minimum records will display
for 20 seconds.
2. Press the “OUT” button again (once while “MIN” is still
displayed, twice otherwise). “MAX” appears in the upper-
center location of the flashing OUTDOOR LCD, indicating
that the maximum temperature and the time and date of
occurrence are displayed.
3. While “MAX” is still displayed press the “OUT” button again
to return to the current data display. By waiting 20 seconds
during either the minimum or the maximum readings the unit
will automatically return to current data readings.
C. RESETTING THE MIMIMUM AND MAXIMUM
RECORDS
1. All the indoor records (minimum and maximum) will be reset
after the “IN” button is pressed and held for 5 seconds.
2. All the outdoor records (minimum and maximum) will be
reset after the “OUT” button is pressed and held for 5
seconds.

16
VI. ALARM FUNCTION
A. SETTING THE ALARM (alarms 1 and 2)
Note: There are two alarms that can set. Each alarm will sound
for a complete duration of 2 minutes.
1. Press and hold the “AL1” button for 5 seconds or until the
alarm-time display flashes in the DATE LCD.
2. Press and release the “IN” button to set the alarm hours, press
and release the “OUT” button to set the alarm minutes.
3. Press the “AL1” button or wait 15 seconds for the unit to
automatically confirm the alarm time and return to display the
date in the DATE LCD as normal.
4. The ((1)) icon, appearing in the DATE LCD, indicates that the
alarm is set to sound at the programmed time.
5. Programming the alarm time automatically activates the alarm
to sound at the programmed time. To deactivate the alarm,
press the “AL1” button (removing the ((1)) icon from the
screen). To reactivate the alarm, press the “AL1” button
again.
6. After each activation or deactivation, the programmed alarm
time is displayed. Wait 15 seconds and the date will display
in the DATE LCD again.
7. To set, activate and deactivate alarm 2, follow the directions
above for alarm 1—using the “AL2” button instead of the
“AL1” button. The ((2)) icon will represent activation and
deactivation of Alarm 2.
B. SNOOZING AND STOPPING THE ALARM
1. The snooze function is activated by pressing any one of the
following buttons: “SET”, “IN”, “OUT” or “SNZ”.
2. To turn the alarm off completely, press any of these buttons:
“CH”, “AL1”, “AL2” or “DATE”.
3. The snooze function will last for 5 minutes before the alarm
begins to sound again. Either the ((1)) or the ((2)) icon will
flash during the snooze mode.

17
VII. ADDING OUTDOOR REMOTE CONTROL SENDERS
(OPTIONAL)
The WS-7025U is able to receive signals from 3 different remote
temperature sensors. The remote temperature sensor model(s) that you
choose will come with their own set of instructions. Follow these
instructions for a complete guide to setting up. Following are some brief
instructions for the basic set-up of remote temperature sensor units with the
WS-7025U. These extra remote temperature sensors can be purchased
through the same dealer as this unit, or by contacting La Crosse Technology
directly. A TX6U will monitor temperature only, a TX3U will monitor
temperature and display the temperature on its LCD, and the TX3UP will
monitor the temperature via a probe for measuring soil or water
temperatures..
Note: When setting up multiple units it is important to remove the batteries
from all existing units in operation. Then insert batteries into all the
remote temperature sensor units in numeric sequence. Second, install
batteries into the indoor weather station. Transmission problems will arise
if this is not done correctly and if the total time for set-up exceeds 6
minutes.
A. SET-UP OF MULTIPLE UNITS
1. It is necessary to remove the batteries from all units currently
in operation.
2. Remove the battery covers to all remote temperature sensor
units.
3. Place all remote temperature sensor units in a numeric
sequential order.
4. In sequential order, install batteries (follow the same battery
installation procedures seen in section I. A) of the Detailed
Set-Up Guide).
5. Install batteries into the indoor weather station.
6. Follow the Detailed Set-Up Guide for programming and
operating instructions.

18
B. VIEWING AND OPERATING WITH MULTIPLE
REMOTE TEMPERATURE SENSOR UNITS
1. To view the temperature of a different remote temperature
sensor unit, press and release the “CH” button. A shift from
one “boxed” number to the next should be observed in the
OUTDOOR LCD.
2. To view the Minimum/Maximum temperature: first select
which remote temperature sensor to read data from (indicated
by the “boxed” number), then press and release the
“MIN/MAX” button. Pressing this button once will display
the minimum temperature and the date and time the data was
recorded. Pressing this button a second time (while “MIN” is
still displayed, otherwise press the button twice) will display
the same data for the maximum recordings.
3. To reset the Minimum/Maximum readings, it is necessary to
select which remote temperature sensor you wish to reset.
Press and hold the “OUT” button for 5 seconds, the records
for the selected remote temperature sensor unit will be reset.
MOUNTING
Note: Before permanently mounting ensure that the indoor weather station
is able to receive WWVB signals from the desired location. Also, extreme
and sudden changes in temperature will decrease the accuracy of the
indoor weather station and changes in elevation will result with inaccurate
weather forecasting for the next 12 to 24 hours. These changes will require
a 12 to 24 hour wait before obtaining reliable data. To achieve a true
temperature reading, avoid mounting where direct sunlight can reach the
remote temperature sensor. We recommend that you mount the remote
temperature sensor on a North-facing wall. The sending range is 80ft—
obstacles such as walls, concrete and large metal objects can reduce the
range. Place both units in their desired location and wait approximately 10
minutes before permanently mounting to ensure that there is proper
reception. The indoor weather station should display a temperature in the
OUTDOOR LCD within 4 minutes of setting up.

19
I. THE REMOTE TEMPERATURE SENSOR
The remote temperature sensor can be mounted in two ways:
• with the use of screws, or
• using the adhesive tape.
A. MOUNTING WITH SCREWS
1) Remove the mounting bracket from the remote
temperature sensor.
2) Place the mounting bracket over the desired location.
Through the three screw holes of the bracket, mark
the mounting surface with a pencil.
3) Where marked, start the screw holes into mounting
surface.
4) Screw mounting bracket onto the mounting surface.
Ensure that the screws are flush with the bracket.
B. MOUNTING WITH ADHESIVE TAPE
1) With a nonabrasive solution, clean and dry the back
of the mounting bracket and the mounting surface to
ensure a secure hold. The mounting surface should
be smooth and flat.
2) Remove the protective strip from one side of the
tape. Adhere the tape to the designated area on the
back of the mounting bracket.
3) Remove the protective strip from the other side of the
tape. Position the remote temperature sensor in the
desired location, ensuring that the indoor temperature
station can receive the signal.

20
II. THE INDOOR TEMPERATURE STATION
The indoor temperature station can be mounted in two ways:
• with the table stand or
• on the wall with the use of a wall hanging screw (not
included).
A. USING THE TABLE STAND
1) The indoor temperature station comes with the table
stand already mounted. If you wish to use the table-
stand all that is required is to place the indoor
temperature station in an appropriate location.
B. WALL MOUNTING
1) Remove the table stand. To do this, pull down on the
stand from the rear and rotate forward.
2) Fix a screw (not included) into the desired wall leaving
approximately 3/16 of an inch (5mm) extended from
the wall.
3) Place the indoor temperature station onto the screw
using the hanging hole on the backside. Gently pull
the station down to lock the screw into place.