La Crosse Technology WS-9035TWC User manual

WS-9035TWC
Wireless 433 MHz
Radio-controlled Weather Station
Instruction Manual

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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
Program Sequence and Default Settings 6
Function Keys 6
Setting the LCD Contrast 6-7
Setting the Time Zone 7
Daylight Saving Time Setting 7
Radio-controlled Time Setting 7
12/24-hour Time Setting 8
Setting the Time 8
Setting the Year, Day and Month 9
Setting the Snooze 9
Setting the Temperature Format 9
Setting the Forecast Sensitivity 10
Features
Weather Forecast Icons and Tendency Arrows 11
Indoor Temperature, Humidity, & Comfort
Level Indicator 11
Outdoor Temperatures 11
Minimum & Maximum Records (Indoor,
Outdoor, & Resetting) 11-12
Moon Phase 13
Current, minimum and maximum Dew Point 13
Wind speed, wind chill and minimum and maximum 13-14
Beaufort Scale 14-16
Time Alarm 16
Mounting 17-18
Troubleshooting 19
Maintenance & Care 19
Specifications 20
Warranty Information 21

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INVENTORY OF CONTENTS
1. The WS-9035U weather station (Figure 1).
2. One TX8U remote temperature/humidity sensor (Figure 2).
3. One TX15U wind speed sensor (Figure 3).
4. Mounting hardware
5. Instruction manual and warranty card.
ADDITIONAL EQUIPMENT (not included)
1. Three fresh AA 1.5V batteries for the indoor weather station.
2. Two fresh AA 1.5V batteries for the remote temperature/humidity sensor.
The remote temperature/humidity sensor powers the wind speed sensor so no batteries are required.
3. One Philips screwdriver for mounting.
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 and date 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. For more information
on the atomic clock and WWVB please see the NIST website at http://www.boulder.nist.gov/timefreq/stations/wwvb.htm.
Figure 1
Time LCD
For
ecast LCD
Indoor LCD
Outdoor LCD
Figure 3
Figure 2
Wind S
p
eed LCD
Moon Phase LCD
Date LCD

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QUICK SET-UP GUIDE
Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries.
1. Have the indoor weather station, remote temperature/humidity sensor and wind speed sensor 3 to 5 feet apart.
2. Insert the telephone plug (RJ-11) from the wind speed sensor into the receptacle on the remote temperature/humidity
sensor.
3. Batteries should be out of both the indoor weather station and remote temperature/humidity sensor units for 10 minutes.
4. Place the batteries into the remote temperature/humidity sensor first then into the indoor weather station.
5. DO NOT PRESS ANY BUTTONS FOR 15 MINUTES.
In this time the indoor weather station and remote temperature/humidity sensor will start to talk to each other and the display will
show the indoor temperature/humidity, outdoor temperature/humidity and wind speed. If the indoor weather station does not display
all information after the 15 minutes please retry the set up as stated above. After all information has been displayed for 15 minutes
you can place your sensors outdoors and set your time.
Important Notes on Set-up and Operation
•The remote temperature/humidity sensor is both the source of power for both outdoor sensors and source of transmission for all
remote sensor data.
•The remote temperature/humidity sensor should be placed in a dry, shaded area.
•Fog and mist will not harm your remote temperature/humidity sensor but direct rain must be avoided.
•Direct rainfall will not harm the wind speed sensor.
•The remote temperature/humidity sensor has a range of 300 feet. Any walls that the signal will have to pass through will reduce
distance. An outdoor wall or window can have up to 30 feet of resistance and an interior wall can have up to 20 feet of
resistance. Your distance plus resistance should not exceed 300 ft. in a straight line.
•The remote temperature/humidity sensor transmits a signal every minute. After the batteries have been installed, the indoor
weather station will search for the signal for a duration of 15 minutes. If there is no temperature or humidity reading in the
OUTDOOR LCD or wind speed in the WIND SPEED LCD after 15 minutes, make sure the units are within range of each other,
or repeat the battery installation procedure.
•If a button is pressed before the indoor weather station receives the signal from the remote temperature/humidity sensor, you will
need to follow the battery installation procedure again.
To complete the set up of your new wireless weather station after the 15 minutes have passed please follow the steps that follow in the
Detailed Set-Up Guide.
DETAILED SET-UP GUIDE
BATTERY INSTALLATION
The first step to powering up the weather station is to insert the connector (RJ11) at the end of the wire attached to the wind speed
sensor to the remote temperature/humidity sensor. Please ensure when doing this that the connector is inserted with the proper
orientation. When seated properly you will hear the connector ‘click’ in place.
A. REMOTE TEMPERATURE/HUMIDITY SENSOR
1. Remove the mounting bracket and humidity hood.
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.
5. Replace the humidity hood.
B. INDOOR WEATHER STATION

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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 3 AA batteries.
3. Replace the battery cover.
Note: Immediately after the batteries have been installed, the LCD (Liquid Crystal Display) will flash. Within 15
seconds the indoor temperature, indoor relative humidity, and the weather icons (sun and clouds) will be displayed.
If not, remove batteries for 10 seconds and reinstall. If the outdoor temperature is not displayed within four minutes,
remove batteries from both units, wait 30 seconds, and reinstall making sure to install batteries into the remote
temperature sensor first. The time will show -:-- and start searching for the WWVB signal. If it successfully receives
the time signal (usually at night), it will display the correct time (default time-zone is Eastern). You will need to
adjust the time zone to match your local time.
PROGRAM MODE
Programming Note: If 30 seconds are allowed to pass, or the WIND/SNZ button is pressed during the programming mode, the
unit will confirm/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 IV through XI, you can advance to step 4 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. PROGRAMMING SEQUENCE AND DEFAULT SETTINGS
The programming sequence and default (factory) settings are as follows:
LCD Contrast 5
Time Zone -5 (Eastern)
Daylight Saving Time ON
Radio-controlled time reception ON
12/24-hour time 12
Time – Hour 12
Time – Minute :00
Year 2003
Month 1
Day 1
Snooze 10 minutes
Temperature Format °F
Forecast Sensitivity 2
II. FUNCTION KEYS
The function keys are located on the front of the unit directly below the LCD (Liquid Crystal Display).

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III. SETTING THE LCD CONTRAST
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
Note: There are 8 LCD contrast levels to choose from—“Lcd 0” is the lightest, and “Lcd 7” is the darkest.
3. Press and release the ALM/+ button to select the level you desire.
4. Press and release the SET button to confirm and advance to the Time Zone setting.
IV. TIME ZONE SETTING
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button again.
4. The time zone will flash in the DATE LCD.
5. Press and release the ALM/+ button to select your time zone.
Note: It is possible to select any time zone from –12 GMT to +12 GMT (for example to see the time in another
country)
TIME ZONES
GMT 0
Atlantic -4
EST; Eastern -5
CST; Central -6
MST; Mountain -7
PST; Pacific -8
ALA; Alaska -9
HAW; Hawaii -10
6. Press and release the SET button to confirm and advance to the Daylight Saving Time setting.
V. DAYLIGHT SAVING TIME (DST) SETTING
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button twice.
4. “DST” will appear in the DATE LCD and either “ON” or “OFF” will
flash in the TIME LCD.
5. Press and release the ALM/+ button to select DST on or off.
Note: “DST OFF” indicates that the feature is off and the WWVB will not change times automatically. “DST ON”
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
OFF”.
6. Press and release the SET button to confirm and advance to the radio-controlled time on/off setting.
VI. RADIO-CONTROLLED TIME ON/OFF SETTING
1. Press and hold the SET button for 5 seconds.

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2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button three times.
4. “RCC” will appear in the DATE LCD and “ON” or “OFF” will flash in
the TIME LCD.
5. Press and release the ALM/+ button to select radio-controlled time on or
off.
6. Press and release the SET button to confirm and advance to the 12/24-
hour time setting.
VII. 12 OR 24 HOUR TIME SETTING
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button four times.
4. “12h” or “24h” will flash in the DATE LCD.
5. Press and release the ALM/+ button to select 12 or 24-hour time format.
Note: When in the 12-hour format “P.M.” will appear to the left of the hour in the time LCD between the hours of
noon and midnight.
6. Press and release the SET button to confirm and advance to the time setting.
VIII. TIME SETTING
There are two methods by which the time and date 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 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
indoor 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 and a signal is
being received, and will remain steady when the signal has been received. 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
Note: When in the 12-hour format “P.M.” will appear to the left of the hour in the time LCD between the hours of
noon and midnight.
Note: Reception of the WWVB signal will automatically set the time. The reception of the signal will override any
programmed time.
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button five times.
4. The hours digits will flash in the TIME LCD.
5. Press and release the ALM/+ button to advance the hours.
6. Press and release the SET button to confirm the hours setting and advance
to the minutes setting.
7. The minutes digits will flash in the TIME LCD.
8. Press and release the ALM/+ button to advance the minutes.
9. Press and release the SET button to confirm and advance to the year setting.

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IX. SETTING THE YEAR, DAY AND MONTH
Note: Reception of the WWVB signal will also set the date and day. The reception of the signal will override any
programmed date and day.
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button seven times.
4. The year will flash in the DATE LCD.
5. Press and release the ALM/+ button to advance the year.
6. Press and release the SET button to confirm the year and advance to the
month setting.
7. The month will flash in the DATE LCD.
8. Press and release the ALM/+ button to advance the month.
9. Press and release the SET button to confirm the month and advance to the
day setting.
10. The day of the month will flash in the DATE LCD.
11. Press and release the ALM/+ button to advance the day of the month.
12. Press and release the SET button to confirm and advance to the snooze
setting.
X. SETTING THE SNOOZE
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button ten times.
4. “Sn” will appear in the DATE LCD and a number will be flashing next to
it.
5. Press and release the ALM/+ button to select the duration of the snooze.
Note: The snooze can be set for 0 to 30 minutes in 5-minute increments. If 0 minutes is selected pressing the
WIND/SNZ button will deactivate the alarm and it will not come back on.
6. Press and release the SET button to confirm and advance to the temperature format setting.
XI. SELECTING °F OR °C
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the time LCD and the number setting will flash.
3. Press and release the SET button eleven times.
4. Either ”°F” or “°C” will flash in the TIME LCD.
5. Press and release the ALM/+ button to select the temperature format.
6. Press and release the SET button to confirm and advance to the forecast
sensitivity setting.
XII. SETTING THE FORECAST SENSITIVITY
Note: The forecast sensitivity can be adjusted to allow for areas that have
a higher or lower sensitivity to changing air pressure (for example coastal
areas have more pressure change than areas such as southern Arizona).
The numbers correspond to the amount of air pressure change necessary to
trigger a change in the forecast icon. Areas that tend to have more air
pressure change would set the sensitivity to 3, while areas that experience
lower than normal air pressure change would set the sensitivity to 1.
1. Press and hold the SET button for 5 seconds.
2. “LCD” will show in the TIME LCD and the number setting will flash.
3. Press and release the SET button twelve times.

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4. Either “1”, “2” or “3” will flash in the TIME LCD and the forecast icon and tendency arrows will flash in the
FORECAST LCD.
5. Press and release the ALM/+ button to select the forecast sensitivity
6. Press and release the SET button to confirm the forecast sensitivity and complete the programming.
FEATURES OF THE WS-9035U
I. WEATHER FORECAST
The weather forecasting feature is estimated to be 75% accurate and is for the next 12 to 24 hours. The weather forecast is
based solely upon the change of air pressure over time. The WS-9035U 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 largely affected by the change of air pressure, the sensitivity setting should be set to 1. In areas where the air pressure
changes more rapidly (such as coastal areas) the sensitivity setting should be set to 3.
A. WEATHER ICONS
There are 3 possible weather icons that will be displayed in the FORECAST LCD:
Comfort Level
Indicator
Weather
Tendenc
y Arrow
WWVB Tower
Icon (indicates
time reception)
Satellite icon
(indicates
outdoor
transmission)
Radio-controlled
time icon
(indicates radio-
controlled time
turned on)
Forecast
icon
Current moon
phase display
Beaufort Scale
Wind Indicator

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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).
These icons indicate the expected weather change in the next 12 to 24 hours. The icon does not give an exact
prediction of the weather, however it should be viewed as a generalization of the expected weather change (for
example a “sunny” icon indicates the weather is expected to improve).
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.
II. INDOOR TEMPERATURE, HUMIDITY, AND COMFORT LEVEL INDICATOR
The current indoor temperature and relative humidity are displayed in the INDOOR LCD.
The comfort level indicator is located at the bottom left of the INDOOR LCD. The 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.
III. OUTDOOR TEMPERATURE AND HUMIDITY
The temperature and humidity received from the remote temperature/humidity sensor is viewed in the OUTDOOR LCD.
IV. MINIMUM AND MAXIMUM TEMPERATURE RECORDS
The WS-9035U 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 and release the IN/HR button once. “MAX” appears to the right of the indoor temperature, indicating that
the maximum temperature (along with the humidity measured at that time) and the time and date of occurrence
are displayed. The maximum records will display for 30 seconds before returning to the normal display mode.
2. Press and release the IN/HR button again (once while “MAX” is still displayed, twice otherwise). “MIN”
appears to the right of the indoor temperature, indicating that the minimum temperature (along with the
humidity measured at that time) and the time and date of occurrence are displayed.
3. While “MIN” is still displayed press and release the IN/HR button again to return to the current data display.
Or you can wait 30 seconds, during either the minimum or the maximum readings, and the unit will
automatically return to current data readings.
B. VIEWING THE OUTDOOR TEMPERATURE RECORDS
1. Press and release the OUT/MIN button once. “MAX” appears above the outdoor temperature and the LCD will
flash, indicating that the maximum temperature, and the time and date of occurrence are displayed. The
maximum records will display for 30 seconds before returning to the normal display mode.

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2. Press and release the OUT/MIN button again (once while “MAX” is still displayed, twice otherwise). “MIN”
appears to the right of the outdoor temperature, indicating that the minimum temperature and the time and date
of occurrence are displayed.
3. While “MIN” is still displayed press and release the OUT/MIN button again to return to the current data
display. Or you can wait 30 seconds, during either the minimum or the maximum readings, and the unit will
automatically return to current data readings.
C. RESETTING THE MIMIMUM AND MAXIMUM RECORDS
To reset the INDOOR records:
1. Press and release the IN/HR button to select the record you wish to reset, either MAX or MIN.
2. Press and hold the SET button for 5 seconds.
3. The record is now reset and will show the current time in the TIME LCD and current indoor temperature and
humidity in the INDOOR LCD.
T o reset the OUTDOOR records:
1. Press and release the OUT/MIN button to select the record you wish to reset, either MAX or MIN
2. Press and hold the SET button for 5 seconds.
3. The record is now reset and will show the current time in the TIME LCD and current outdoor temperature and
humidity in the OUTDOOR LCD.
V. MOON PHASE
There are 12 moon phases shown on the indoor weather station; the black portion signifies the portion of the moon visible in
the sky. Thus, when the moon icon is all black, it is a full moon.
VI. VIEWING THE CURRENT, MAXIMUM AND MINUMUM DEW POINT
To view the current dew point:
1. Press and hold the OUT/MIN button for 5 seconds.
2. The OUTDOOR LCD will switch to show the dew point (DEW POINT will be visible in the upper left corner
of the OUTDOOR LCD).
To view the maximum and minimum dew point readings:
1. Press and release the OUT/MIN button.
2. The maximum or minimum value along with the time and
date it was recorded will be displayed (MAX or MIN will be
displayed below the words DEW POINT in the OUTDOOR
LCD).
3. After 30 seconds the display will automatically go back to
the normal display mode showing the current dew point
reading.
To reset the maximum or minimum dew point record:
While viewing either the maximum or minimum dew point record:

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1. Press and hold the SET button for 5 seconds.
2. The record will now be reset and show the current time in the TIME LCD and dew point reading in the
OUTDOOR LCD.
To return to the outdoor temperature/humidity viewing mode:
1. Press and hold the OUT/MIN button for 5 seconds.
2. The OUTDOOR LCD will switch back to show the outdoor temperature and humidity (DEW POINT will no
longer be visible in the upper left corner of the OUTDOOR LCD).
VII. WIND SPEED, WIND CHILL, MINIMUM AND MAXIMUM VALUES
In the WIND SPEED LCD you can view the current wind speed and
gust. The wind speed is updated every 128 seconds with the average
wind speed of that time being displayed. The gust display is the
highest gust for the last 128-second period.
To view the current wind chill:
1. Press and release the WIND/SNZ button.
2. The wind chill value will display at the bottom of the WIND SPEED LCD.
To view the maximum and minimum wind/wind chill values:
1. Press and hold the WIND/SNZ button for 3 seconds.
2. The WIND SPEED LCD will now show the maximum wind.
3. Press and release the WIND/SNZ button again.
4. The WIND SPEED LCD will now show the maximum wind
gust.
5. Press and release the WIND/SNZ button.
6. The WIND SPEED LCD will now show the minimum wind
chill.
7. Press and release the WIND/SNZ button.
8. The WIND SPEED LCD will now show the maximum wind chill.
To reset the maximum and minimum wind/wind chill values:
1. Select the value you wish to reset by pressing and releasing the WIND/SNZ button.
2. Press and hold the SET button for 5 seconds.
3. The record will now be reset and show either 0.0 for max wind speed and wind gust or the current wind chill in
the OUTDOOR LCD.
To return to the normal viewing mode:
1. Press and release the ALM/+ button or
2. After 15 seconds the display will automatically return to the normal viewing mode.
VIII.BEAUFORT SCALE WIND SPEED
The Beaufort Scale wind meter is located at the top of the WIND
SPEED LCD. It corresponds to the average wind speed and not the
gust. On the following pages is a list of the Beaufort Scale and the
wind speeds it corresponds to.

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Wind Speed
Beaufort Number
or Force mph km/hr knots
Description Effects Land / Sea
0<1 <1 <1 Calm
Still, calm air, smoke
will rise vertically.
Water is mirror-like.
11-3
mph 1-5 kph 1-3 knots Light Air
Rising smoke drifts,
wind vane is inactive.
Small ripples appear
on water surface.
24-7
mph 6-11 kph 4-6 knots Light Breeze
Leaves rustle, can feel
wind on your face,
wind vanes begin to
move.
Small wavelets
develop, crests are
glassy.
38-12
mph 12-19 kph 7-10 knots Gentle Breeze
Leaves and small
twigs move, light
weight flags extend.
Large wavelets, crests
start to break, some
whitecaps.
413-18
mph 20-28 kph 11-16 knots Moderate Breeze
Small branches move,
raises dust, leaves
and paper.
Small waves develop,
becoming longer,
whitecaps.
519-24
mph 29-38 kph 17-21 knots Fresh Breeze
Small trees sway.
White crested
wavelets (whitecaps)
form, some spray.
625-31
mph 39-49 kph 22-27 knots Strong Breeze
Large tree branches
move, telephone wires
begin to "whistle",
umbrellas are difficult
to keep under control.
Larger waves form,
whitecaps prevalent,
spray.
732-38
mph 50-61 kph 28-33 knots Moderate or Near Gale
Large trees sway,
becoming difficult to
walk.
Larger waves develop,
white foam from
breaking waves
begins to be blown.
839-46
mph 62-74 kph 34-40 knots Gale or Fresh Gale
Twigs and small
branches are broken
from trees, walking is
difficult.
Moderately large
waves with blown
foam.

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947-54
mph 75-88 kph 41-47 knots Strong Gale
Slight damage occurs
to buildings, shingles
are blown off of roofs.
High waves (6 meters),
rolling seas, dense
foam, Blowing spray
reduces visibility.
10 55-63
mph 89-102 kph 48-55 knots Whole Gale or Storm
Trees are broken or
uprooted, building
damage is
considerable.
Large waves (6-9
meters), overhanging
crests, sea becomes
white with foam, heavy
rolling, reduced
visibility.
11 64-72
mph 103-117 kph 56-63 knots Violent Storm
Extensive widespread
damage.
Large waves (9-14
meters), white foam,
visibility further
reduced.
12 73+
mph 118+ kph 64+ knots Hurricane
Extreme destruction,
devastation.
Large waves over 14
meters, air filled with
foam, sea white with
foam and driving spray,
little visibility.
IX. TIME ALARM
To set the time alarm:
1. Press and hold the ALM/+ button for 5 seconds.
2. The alarm time will begin to flash in the DATE LCD.
3. Press and release the IN/HR button to adjust the hour.
Note: When in the 12-hour mode and setting an alarm for a time between noon and midnight, “PM” will appear to
the left of the alarm time in the DATE LCD.
4. Press and release the OUT/MIN button to adjust the minutes.
5. Press and release the WIND/SNZ button to confirm the setting or wait for 20 seconds and the display will
automatically return to the normal mode.
To activate the alarm:
1. Press and release the ALM/+ button to toggle between the alarm
time and the day and date.
2. When the alarm time and alarm icon are showing in the DATE
LCD the alarm is activated.
3. When the day and date are showing in the DATE LCD the alarm
is deactivated.
To activate the snooze:
1. While the alarm is sounding press and release the WIND/SNZ button.
2. The snooze will be activated and the alarm will come back on after the selected time period.

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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/humidity sensor or indoor weather station. While the remote
temperature/humidity sensor is weather proof, avoid submersion in water or snow. We recommend that you mount the
remote temperature/humidity sensor on an outside North-facing wall. The sending range is 300ft—obstacles such as walls,
concrete, and large metal objects can reduce the range. Place both units in their desired location, and wait approximately 15
minutes before permanently mounting to ensure that there is proper reception. The indoor weather station should display a
temperature and humidity in the OUTDOOR LCD and wind speed (can be 0.0) in the WIND SPEED LCD within 4 minutes
of setting up.
I. THE REMOTE TEMPERATURE/HUMIDITY SENSOR
The remote temperature/humidity sensor can be mounted in several ways:
•With the use of screws
•Using adhesive tape
•Using nylon straps
A. MOUNTING WITH SCREWS
1) Remove the mounting bracket from the remote
temperature/humidity sensor.
2) Place the mounting bracket over the desired location.
3) Through the two screw holes of the bracket, mark the
mounting surface with a pencil.
4) Screw mounting bracket onto the mounting surface. Ensure
that the screws are tight against the bracket.
5) Insert the remote temperature/humidity sensor into 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.
3) Adhere the tape to the designated area on the back of the mounting bracket.
4) Remove the protective strip from the other side of the tape.
5) Position the remote temperature/humidity sensor in the desired location, ensuring that the indoor
weather station can receive the signal.
C. MOUNTING WITH NYLON STRAPS
1) Remove the mounting bracket from the remote
temperature/humidity sensor.
2) Place two nylon straps through the slots on the mounting bracket.
3) Place the remote temperature/humidity sensor in your desired
mounting location.
4) Fasten the two nylon straps securely around the mounting
location.

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II. THE REMOTE WIND SPEED SENSOR
The remote wind speed sensor can be mounted two ways:
•With the use of screws
•Using nylon straps
A. MOUNTING WITH SCREWS
1) Unlock the mounting bracket from the remote wind speed sensor leaving the wire going through the
bracket.
2) Place the mounting bracket over the desired location.
3) Through the two screw holes of the bracket, mark the mounting surface with a pencil.
4) Screw the mounting bracket onto the mounting surface. Ensure that the screws are tight against the
bracket.
5) Slide the remote wind speed sensor onto the bracket making sure to lock it in place.
B. MOUNTING WITH NYLON STRAPS
1) Unlock the mounting bracket from the remote wind
speed sensor leaving the wire going through the
bracket.
2) Place two nylon straps through the slots on the
mounting bracket.
3) Place the remote wind speed sensor in your desired
location.
4) Fasten the two nylon straps securely around the
mounting location.
5) Slide the remote wind speed sensor onto the bracket
making sure to lock it in place.
III. THE INDOOR WEATHER STATION
1) Fix a screw (not included) into the desired wall, leaving approximately 3/16 of an inch (5mm)
extended from the wall.
2) Place the indoor weather station onto the screw using the hanging hole on the backside.
3) Gently pull the indoor weather station down to lock the screw into place.
TROUBLESHOOTING
NOTE: For problems not solved, please contact La Crosse Technology.
Problem: No reception of WWVB time signal.
Solution: 1) Wait overnight for signal.
2) Be sure indoor weather station is at least 6 feet from any electrical devices, such as televisions, computers, or other radio-
controlled clocks.
3) Remove batteries for five minutes, reinsert and leave the unit alone overnight without pressing buttons.
4) If there are still problems, contact La Crosse Technology.
Problem: Hour is incorrect (minute and date are correct).
Solution: Be sure correct time zone and daylight saving time settings are selected.
Problem: The LCD is faint.
Solution: 1) Set the LCD contrast to a higher number.
2) Replace the batteries
Problem: No outdoor temperature/humidity and/or wind speed is displayed.
Solution: 1) Disconnect the cable from the remote wind speed sensor, then reinsert making sure the cable clicks in place.
2) Remove all batteries, reinsert into remote temperature/humidity sensor first, then the indoor weather station.
3) Place the remote temperature/humidity sensor closer to the display.
4) Be sure all batteries are fresh.

17
5) Place the remote temperature/humidity sensor and indoor weather station in position so the straight-line signal is not
passing through more than two or three walls.
Problem: Temperatures do not match if units are placed next to each other.
Solution: Each temperature/humidity sensor is manufactured to be accurate to within 2 degree plus or minus and under normal
conditions, so two sensors could be as much as 4 degrees different. However, the difference can be exaggerated further
because the sensors are designed for different working environments. The indoor temperature sensor is less responsive to
ambient air currents because of the shielding effect of the display's case. In addition, the case can act as a heat sink to
absorb and store heat from external sources (i.e. handling of the case or radiant heat). Also, the much greater range of the
remote temperature/humidity sensor requires a different calibration curve than the indoor range. Error is usually greater at
the extreme ends of a range, making it harder to compare different ranges with different curves. Under non-laboratory
conditions, it is difficult to compensate for the above factors and obtain an accurate comparison.
MAINTENANCE AND CARE INSTRUCTIONS
• Extreme temperatures, vibration, and shock should be avoided to prevent damage to the units.
• Clean displays and units with a soft, damp cloth. Do not use solvents or scouring agents; they may mark the displays and
casings.
• Do not submerge in water.
• Immediately remove all low powered batteries to avoid leakage and damage.
• Opening the casings invalidates the warranty. Do not try to repair the unit. Contact La Crosse Technology for repairs.

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SPECIFICATIONS
Weather data measuring range:
Indoor: 14.2°F to 139.8°F with 0.1°F
resolution (0°C to 59.9°C with
0.1°C resolution) “OFL”
displayed if outside this range
Outdoor and dew point: -21.8°F to 157.8°F with 0.1°F
resolution (-29.9°C to 69.9°C
with 0.1°C resolution) “OFL”
displayed if outside this range
Wind chill: -21.8°F to 157.8°F with 0.1°F
resolution (-29.9°C to 69.9°C
with 0.1°C resolution) “OFL”
displayed if outside range
Indoor relative humidity
measuring range: 1% to 99% with 1% resolution (“- -” displayed if outside this
range
Outdoor relative humidity
measuring range: 1% to 99% with 1% resolution (“- - “ displayed if outside this
range
Wind speed measuring range: 0 to 111.8 mph (0 to 50 m/s)
Weather data checking interval:
Indoor temperature checking
interval: Every 15 seconds
Indoor humidity checking
interval: Every 20 seconds
Outdoor temperature checking
interval (remote
temperature/humidity sensor):
Every 128 seconds
Outdoor humidity checking
interval: Every 128 seconds
Wind speed checking interval: Average of 128 seconds with
highest gust
Outdoor temperature, humidity
and wind speed reception
(indoor weather station):
Every 128 seconds
Transmission range: 300 feet (in open space)
Power Supply:
Indoor weather station: 3 x AA, IEC LR6, 1.5V
Remote temperature/humidity
sensor: 2 x AA, IEC LR3, 1.5V
Remote wind speed sensor: Supplied by remote
temperature/humidity sensor
Battery life cycle: Approximately 12 months
Recommended battery type: Alkaline
Dimensions (H x W x D):
Indoor weather station: 9” x 4.62” x 1.25”
(227 x 117.4 x 31.2 mm)
Remote temperature/humidity
sensor: 5.4” x 2.25” x 2.25” (137 x 56.2 x 56.2 mm)
Remote wind speed sensor: 7.5” x 2.2” x 2.2”
(191.2 x 55.8 x 56 mm)

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WARRANTY INFORMATION
La Crosse Technology provides a 1-year warranty on this weather station. Contact La Crosse Technology immediately upon
discovery of any defects covered by this warranty.
Before sending the Weather Station in for repairs, contact La Crosse Technology. The Weather Station will be repaired or replaced
with the same or similar model.
This warranty does not cover any defects resulting from improper use, unauthorized repairs, faulty batteries, or the Weather Stations
inability to receive a signal due to any source of interference.
LA CROSSE TECHNOLOGY WILL NOT ASSUME LIABILITY FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE, OR
OTHER SIMILAR DAMAGES ASSOCIATED WITH THE OPERATION OR MALFUNCTION OF THIS WEATHER STATION.
THIS PRODUCT IS NOT TO BE USED FOR MEDICAL PURPOSES OR FOR PUBLIC INFORMATION. THIS PRODUCT IS
NOT A TOY. KEEP OUT OF CHILDRE’S REACH.
This warranty gives you specific legal rights. You may also have other rights specific to your State. Some States do no allow the
exclusion of consequential or incidental damages therefore the above exclusion of limitation may not apply to you.
For warranty work, technical support, or information contact:
La Crosse Technology
2809 Losey Blvd. S.
La Crosse, WI 54601
Phone: [phone]
Fax: [phone]
e-mail:
[email protected]
(warranty work)
[email protected]
(information on other products)
web:
www.lacrossetechnology.com
FCC DISCLAIMER
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO
CONDITIONS:
1. THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2. THIS DEVICE MUST ACCEPT INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE
UNDESIRED OPERATION.
FCC ID: OMO-01RX (Receiver), OMO-01TX (transmitter)
Freq. 433.92 MHz
La Crosse Technology
Made in China
WS-9035U
081703
All rights reserved. This handbook must not be reproduced in any form, even in excerpts, or duplicated or processed using electronic,
mechanical or chemical procedures without written permission of the publisher.
This handbook may contain mistakes and printing errors. The information in this handbook is regularly checked and corrections
made in the next issue. We accept no liability for technical mistakes or printing errors, or their consequences.
All trademarks and patents are acknowledged.