La Crosse Technology Weather Radio WS 9020U User Manual

WS-9020U 915MHZ  
INTELLIGENT WEATHER STATION  
Instruction Manual  
INSTANT TRANSMISSION is the state-  
of-the-art new wireless transmission  
technology, exclusively designed and  
developed by LA CROSSE  
This product offers:  
TECHNOLOGY. INSTANT  
TRANSMISSION offers you an  
immediate update (every 4 seconds!) of  
all your outdoor data measured from  
the sensors: Chart the weather as it  
happens!  
FEATURES  
INTELLIGENT WEATHER STATION  
Hanging hole  
LCD  
Display  
Battery  
compartment  
Weather  
information  
text  
Function Keys  
Removable Stand  
Immediate update (every 4 seconds!) of all your outdoor data  
measured from the sensors (note: 4 second may vary while  
updating)  
WWVB Radio-controlled time with manual setting option  
WWVB reception ON/OFF (user selectable)  
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In this time the intelligent weather station and remote  
temperature/humidity sensor will begin to communicate with each other  
and the display will show the temperature/humidity, outdoor  
temperature/humidity. If the intelligent 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 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.  
The remote temperature sensor should be placed in a dry,  
shaded area. The remote temperature sensor has a range of 330  
feet. Keep in mind that the 330 feet is in open air with no  
obstructions and that radio waves DO NOT curve around objects.  
Actual transmission range will vary depending on what is in the  
path of the signal. Each obstruction (roof, walls, floors, ceilings,  
thick trees, etc.) will effectively cut signal range in half.  
Example: A wireless weather station receiver with a 330 feet  
range is mounted on an interior wall, so that the signal has to pass  
through one interior wall, one exterior wall, and across the 10 foot  
width of the room between the 2 walls. The first wall will reduce  
the range to 165 feet, and the second wall will reduce the range to  
87 feet. Factoring in the 10 foot room, this leaves a maximum of  
77 feet of remaining signal range.  
This allowance is typically enough for a frame wall with non-  
metallic siding; however certain materials can reduce range even  
further. Metal siding, stucco, and some types of glass can reduce  
signal range by as much as ¾ or more, compared to the ½  
reduction typical of most obstructions. It is possible to receive a  
signal through these materials, however maximum range will be  
much less due to their tendency to absorb or reflect a much larger  
portion of the sensor’s signal.  
The remote temperature/humidity sensor transmits a signal every  
4 seconds – with variations during updating periods. After the  
batteries have been installed, the intelligent weather station will  
search for the signal for the duration of 45 seconds. If there is no  
temperature or humidity reading in the OUTDOOR LCD after 5  
minutes, make sure the units are within range of each other, or  
repeat the battery installation procedure.  
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If a button is pressed before the intelligent 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 intelligent weather station  
after the 5 minutes have passed, please follow the steps in the “Manual  
Settings” section.  
Note:  
If the outdoor sensor signal reception is not successful on the first  
frequency of 915MHz for 45 seconds, the frequency is changed to  
920MHz, and the learning is tried for another 45 seconds. If it is still not  
successful the reception is tried for 45 seconds on 910MHz. This will  
also be done during re-synchronization.  
BATTERY INSTALLATION  
INTELLIGENT WEATHER STATION  
The intelligent weather station uses 3 x  
AA (alkaline recommended) batteries.  
When the batteries need to be  
replaced the low battery symbol will  
appear on the LCD (or replace the  
batteries annually). To install and  
replace the batteries, please follow the  
steps below:  
1.  
2.  
Remove the cover.  
Insert batteries observing the  
correct polarity (see battery  
compartment marking).  
3.  
Replace battery cover.  
REMOTE TEMPERATURE/HUMIDITY SENSOR  
The remote temperature/humidity sensor uses 2 x AA  
(alkaline recommended) batteries. To install and  
replace the batteries, please follow the steps below:  
1.  
2.  
3.  
Remove the battery cover at the front side with a  
small screwdriver.  
Insert the batteries, observing the correct polarity  
(see battery compartment marking).  
Replace the battery cover on the unit.  
Note:  
When changing the batteries in any of the units, all units need to be  
reset by following the “Quick Set Up Guide” procedures. This is because  
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a random security code is assigned by the sensor at start-up, and this  
code must be received and stored by the intelligent weather station in  
the first few minutes of power being supplied to it.  
BATTERY CHANGE:  
It is recommended to replace the batteries in all units on an annual  
basis to ensure optimum accuracy of these units.  
Please participate in the preservation of the environment.  
Return used batteries to an authorized facility.  
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 intelligent  
weather station. However, due to the nature of the Earth’s Ionosphere,  
reception is very limited during daylight hours. The intelligent 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  
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FUNCTION KEYS  
Intelligent weather station:  
The intelligent weather station has 5 easy to use function keys on the  
right side of the unit.  
SET key  
CH key  
MAX/+ key  
MIN/- key  
ALARM key  
SET key  
Press and hold the key to enter manual setting modes: LCD  
contrast, 12/24 hour time display, time zone, daylight saving time  
ON/OFF, manual time setting, calendar, WWVB ON/OFF, ºF/ºC  
temperature unit, pressure unit, relative pressure setting and  
language display  
Confirm weather alarm in the setting mode  
Reset individual MIN/MAX temperature/humidity record  
Turn weather alarm off when sounding  
!<deleted bullet>!  
CH key (Channel key)  
Select channel 1, 2, or 3 (if more than 1 sensor is used)  
Exit setting mode  
Detect/Re-detect sensor’s signal for all channels  
Turn weather alarm off when sounding  
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MAX/+ key  
Display MAX indoor / outdoor temperature and humidity records  
with time of recording  
Increase all values in manual setting modes  
Increase the weather alarm values  
Turn weather alarm off when sounding  
Reset max/min record  
MIN/- key  
Display MIN indoor and outdoor temperature and humidity records  
with time of recording  
Decrease all values in manual setting modes  
Decrease the weather alarm values  
Turn weather alarm off when sounding  
Reset max/min record  
ALARM key  
Enter the weather alarm time setting mode  
Set next weather alarm in weather alarm setting mode  
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LCD SCREEN  
The LCD screen is split into 6 sections displaying the information for  
outdoor data, indoor data, time and date, weather forecast, air pressure  
and air pressure history, weather information display.  
Signal reception  
icon*  
Outdoor relative  
humidity in  
RH%  
Outdoor  
temperature  
in °F or ºC  
Outdoor  
sensor  
identification  
number  
Indoor Temperature  
in °F or ºC  
Indoor relative  
humidity in  
RH%  
WWVB reception icon  
(for WWVB time)  
Time  
display  
Calendar  
display  
Weather  
forecast icon  
Air pressure  
tendency  
indicator  
Relative air  
pressure  
display in  
hPa or inHg  
Air pressure  
history bar  
graph  
Weather display information in English,  
German, French, Italian and Spanish  
*When the signal from the remote temperature/humidity sensor is  
successfully received by the intelligent weather station, this signal  
reception will be switched on. (If not successful, the icon will not be  
shown on LCD) So the user can easily see whether the last reception is  
successful (icon on) or not (icon off). On the other hand, the short  
blinking of the icon shows that reception is currently taking place.  
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MANUAL SETTINGS  
The following manual settings can be changed when pressing and  
holding the SET key for approximately 4 seconds:  
LCD contrast setting  
12/24 hour time display  
Time zone setting  
Daylight time saving ON/OFF  
Manual time setting  
Calendar setting  
WWVB time reception ON/OFF setting  
°F/°C temperature unit setting  
Air pressure unit setting  
Relative pressure value setting  
Language display setting  
LCD CONTRAST SETTING  
Last digit flashing  
The LCD contrast can be set within 8 levels, from LCD 1 to LCD8  
(default setting is LCD 5):  
1.  
Press and hold the SET key for about 4 seconds until the digit  
start flashing.  
2.  
3.  
Use the MAX/+ or MIN/- key to view all levels of contrast.  
Select the desired LCD contrast. Press and release the SET key  
to confirm selection and to enter the 12/24 Time Display setting.  
12/24 HOUR TIME DISPLAY SETTING:  
Digit flashing  
The time display can be set to view time in 12 or 24 hour format. The  
default time display mode is “12h”. To set to “24h” time display:  
1.  
2.  
Use the MAX/+ or MIN/- key to toggle the value.  
Press and release the SET key to confirm selection and to enter  
the Time Zone setting.  
TIME ZONE SETTING  
Digit flashing  
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The time zone can be set ±12 hour. The default time zone is set to  
Eastern Time zone (“EST”). To set a different time zone:  
1.  
2.  
The current time zone value starts flashing.  
Use the MAX/+ or MIN/- key to set the time zone. The MAX/+ key  
increases the value and the MIN/- key decreases the value in  
consecutive 1 hour intervals.  
3.  
Press and release the SET key to confirm selection and to enter  
the Daylight saving time On/Off setting.  
DAYLIGHT TIME SAVING ON/OFF SETTING  
The Daylight Saving Time setting may be turned “on” or “off”.  
Digit flashing  
Flashing  
The digit “ON” will start flashing on the LCD.  
Use the MAX/+ or MIN/- key to turn OFF the daylight time saving  
function.  
1.  
2.  
3.  
Press and release the SET key to confirm selection and to enter  
the Manual Time setting.  
MANUAL TIME SETTING:  
In case the intelligent weather station cannot detect the WWVB-signal  
(for example due to disturbances, transmitting distance, etc.), the time  
can be manually set. The clock will then work as a normal Quartz clock.  
Minutes  
flashing  
Hour  
flashing  
1.  
2.  
3.  
The hour digit will start flashing.  
Use the MAX/+ or MIN/- key to set the hour.  
Press again the SET key to switch to the minutes. The minute  
digits start flashing.  
4.  
5.  
Use the MAX/+ or MIN/- key to set the minutes.  
Press and release the SET key to confirm selection and to enter  
the Calendar setting.  
Note:  
The unit will still try to receive the WWVB signal between 0:00 and 6:00  
am every day despite it being manually set, if the WWVB reception  
function has been set ON. When it does receive the signal, it will change  
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the manually set time into the received time. During reception attempts  
the WWVB tower icon will flash. If reception has been unsuccessful,  
then the WWVB tower icon will not appear but reception will still be  
attempted the following hour.  
CALENDAR SETTING:  
"Date. Month." (for 24h time display)  
"Month. Date." (for 12h time display)  
Weekday  
Year  
The date default of the intelligent weather station is 1. 1. in the year  
2005. Once the radio-controlled time signals are received, the date is  
automatically updated. However, if the signals are not received, the date  
can also be set manually.  
1.  
2.  
The year starts flashing.  
Use the MAX/+ or MIN/- key to set the year. The range runs from  
2005 to 2030.  
3.  
Press the SET key again to confirm and to enter the month  
setting. The month starts flashing.  
4.  
5.  
Use the MAX/+ or MIN/- key to set the month.  
Press the SET key again to confirm and to enter the date setting  
mode. The date starts flashing.  
6.  
7.  
Use the MAX/+ or MIN/- key to set the date.  
Press and release the SET key to confirm selection and to enter  
the WWVB Time Reception ON/OFF setting.  
WWVB TIME RECEPTION ON/OFF SETTING  
Flashing  
In area where reception of the WWVB time is not possible, the WWVB  
time reception function can be turned OFF. The clock will then work as a  
normal Quartz clock. (Default setting is ON).  
4.  
5.  
The digit “ON” will start flashing on the LCD.  
Use the MAX/+ or MIN/- key to turn OFF the time reception  
function.  
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6.  
Press and release the SET key to confirm selection and to enter  
the ºF/ºC Temperature Unit setting.  
Note:  
If the WWVB time reception function is turned OFF manually, the clock  
will not perform any reception of the WWVB time as long as the WWVB  
OFF function is activated.  
The WWVB reception icon  
will not be displayed on the LCD.  
°F/°C TEMPERATURE UNIT SETTING  
Flashing  
The temperature display can be selected to show temperature data in °F  
or °C. (default °F)  
1.  
2.  
Use the MAX/+ or MIN/- key to toggle between “°F” or “°C”.  
Confirm with the SET key and enter the Air Pressure Unit  
setting.  
RELATIVE AIR PRESSURE UNIT SETTING  
Flashing  
The relative air pressure unit can be set in inHg or hPa unit. (default unit  
is inHg).  
1.  
Use the MAX/+ or MIN/- key to toggle between “inHg”, “hPa” or  
“mmHg”  
2.  
Press and release the SET key to confirm selection and to enter  
the Relative Pressure Value setting.  
Note:  
The default reference pressure value of the barometer is 29.91 inHg  
(1013 hPa). For an exact measurement it is necessary to first adjust  
the barometer to your local relative air pressure (related to  
elevation above sea level). Ask for the present atmospheric pressure  
of your home area (Local weather service, calibrated instruments in  
public buildings, airport).  
RELATIVE PRESSURE VALUE SETTING  
The default relative pressure value is 29.91 inHg (1013 hPa). This  
corresponds to the average air pressure. Pressure below this is referred  
to as low-pressure area (weather to become worse), pressure above as  
high-pressure area (weather to improve). The relative air pressure can  
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be manually set to another value within the range of 28.35 to 30.72 inHg  
(960 – 1040 hPa) for a better reference.  
Digit flashing  
1.  
2.  
The current relative pressure value will start flashing  
Use the MAX/+ or MIN/- key to increase or decrease the value.  
Keep holding the key allows the value to advance faster.  
Press and release the SET key to confirm selection and to enter  
the Language display setting.  
3.  
Note:  
This calibration facility is useful for those users living at various  
elevations above sea level, but wanting their air pressure display based  
on sea level elevation.  
LANGUAGE DISPLAY SETTING:  
The language for the calendar and “Intelligent” weather information  
display can be set to view in German (D), French (F), Italian (I), Spanish  
(S) & English (E) Default setting is English. To set another language:  
1.  
Use the MAX/+ or MIN/- key to set the desired language.  
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2.  
Press and release the SET key to confirm selection and exit the  
Manual settings.  
TO EXIT THE MANUAL SETTING MODE  
To exit the manual setting anytime during the manual setting modes,  
press the CH key anytime or wait for an automatic timeout. The mode  
will return to normal time display.  
OUTDOOR TEMPERATURE AND HUMIDITY:  
The first LCD section can show the outdoor temperature, the reception  
indicator, the minimum or maximum reading. A number in the bottom  
part will also be shown if more than one sensor has been used.  
Outdoor temperature  
alarm icon  
Outdoor temperature  
in °F or °C  
Outdoor humidity  
display in RH%  
MIN/MAX icon  
Outdoor reception signal  
Sensor identification number (only if there is  
more than one sensor)  
INDOOR RELATIVE HUMIDITY AND INDOOR  
TEMPERATURE:  
The indoor temperature and humidity data are automatically updated  
and displayed in the second section of the LCD.  
Indoor temperature  
in °F or ºC  
Indoor relative  
humidity in %  
TOGGLING BETWEEN MIN/MAX INDOOR AND OUTDOOR  
RECORDINGS:  
To toggle between the current, minimum and maximum data and the  
times they were recorded, press the MIN/- key for viewing the minimum  
values, and press the MAX/+ key for viewing the maximum values  
(shown in MIN or Max displays).  
When pressing the MIN/- or the MAX/+ key, the MIN and the MAX data  
will be displayed as following sequences:  
1.  
MAX or MIN outdoor temperature data with time and date of  
recordings. Data will flash  
1.  
MAX or MIN outdoor humidity data with time and date of  
recordings. Data will flash  
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2.  
3.  
4.  
MAX or MIN indoor temperature data with time and date of  
recordings. Data will flash  
MAX or MIN indoor humidity data with time and date of recordings.  
Data will flash  
Return to current indoor and outdoor data.  
ADDING SENSORS (OPTIONAL)  
The WS-9020U is able to receive signals from 3 remote  
temperature/humidity sensors (TX28U-IT). These extra sensors can be  
purchased through the same dealer as this unit  
TO SET-UP OF MULTIPLE SENSORS  
1.  
Remove all the batteries from the receiver and sensor(s) and wait  
60 seconds. During these 60 seconds, press any button 20 times  
to discharge any excess power.  
2.  
3.  
Insert the batteries to the first Thermo-hygro sensor.  
Within 2 minutes of powering up the first sensor, insert the  
batteries to the Weather Station. Once the batteries are in place,  
all segments of the LCD will light up briefly. Following the  
indoor/outdoor temperature and humidity, time as 12:00, calendar,  
and weather icons will be displayed. If they are not shown in LCD  
after 60 seconds, remove the batteries and wait for at least 60  
seconds before reinserting them.  
4.  
5.  
The outdoor temperature and humidity from the first sensor  
(channel 1) should then be displayed on the Weather station. If  
this does not happen and the signal reception icon is not shown,  
after 2 minutes, the batteries will need to be removed from both  
units and reset from step 1.  
Insert the batteries to the second sensor as soon as the outdoor  
temperature and humidity readings from the first sensor are  
displayed on the Weather station.  
NOTE: You must insert the batteries into the second sensor  
within 45 seconds of reception of the first sensor.  
The outdoor temperature and humidity from the second sensor  
and the "channel 2" icon should then be displayed on the Weather  
station. If this does not happen after 2 minute, the batteries will  
need to be removed from all the units and reset from step 1.  
Insert the batteries to the third sensor as soon as the "channel 2"  
icon and outdoor data are displayed on the Weather station. Then  
within 2 minutes, the channel 3 outdoor data from the third sensor  
will be displayed and the channel icon will shift back to "1" once  
the third sensor is successfully received. If this is not happen, user  
shall restart the setting up from step 1.  
6.  
7.  
NOTE: You must insert the batteries into the third sensor  
within 45 seconds of reception of the second sensor.  
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IMPORTANT: Transmission problems will arise if the setting for  
multiple sensors is not followed as described above. Should  
transmission problems occur, it is necessary to remove the  
batteries from all units and start again the set-up from step 1.  
TO VIEW MIN/MAX INDOOR AND OUTDOOR RECORDS:  
To toggle between the current, minimum and maximum data and the  
times they were recorded, press the MIN/- key for viewing the minimum  
values, and press the MAX/+ key for viewing the maximum values  
(shown in MIN or Max displays).  
Max icon  
When pressing the MIN/- or the MAX/+ key, the MIN and the MAX data  
will be displayed as following sequences:  
1.  
2.  
3.  
4.  
5.  
MAX or MIN outdoor temperature data with time and date of  
recordings. Data will flash.  
MAX or MIN outdoor humidity data with time and date of  
recordings. Data will flash.  
MAX or MIN indoor temperature data with time and date of  
recordings. Data will flash.  
MAX or MIN indoor humidity data with time and date of  
recordings. Data will flash.  
Return to current indoor and outdoor data.  
TO VIEW THE MIN/MAX DATA FROM DIFFERENT  
SENSORS  
When more than 1 sensor used  
1.  
To toggle between sensors, press the CH key:  
Once to show sensor 2  
Twice to show sensor 3  
Three times to return to sensor 1  
2.  
While the outdoor MIN/MAX humidity and temperature date is  
being displayed, press the CH key. The display will toggle  
between the different channels MIN/MAX data.  
Note:  
For example, when the MIN outdoor temperature data is displayed and  
the MAX/+ key is pressed, MAX data outdoor temperature will be  
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displayed. If the MAX outdoor temperature data is displayed and the  
MIN/- key is pressed, MIN outdoor data will be displayed.  
While MIN/MAX data is displayed, the channel can be changed by  
pressing the CH key.  
TO RESET THE MIN/MAX VALUES TO CURRENT VALUES:  
To reset individual indoor and outdoor MIN/MAX values to current  
values:  
1.  
Press the MAX/+, MIN/- and CH key to select the desired  
MIN/MAX value.  
2.  
Press the SET key to reset the selected value to current value  
Note:  
To reset all indoor and outdoor MIN/MAX values to current values, press  
and hold the MAX/+ or MIN/- key for 3 seconds.  
OUTDOOR CHANNEL RE-LEARN MODE  
In case the temperature data in a particular outdoor channel often  
shows “--.-“ due to low battery level or false reset of a sensor, that  
sensor can be set up again.  
To re-learn ALL channels:  
Press and hold the CH key for 3 seconds (outdoor reception signal will  
show next to channel display).  
WEATHER ALARM SETTING  
The intelligent weather station can be set to alert when a specific  
weather condition is reach.  
The following Weather Alarm settings can be changed when  
pressing and holding the ALARM key for approximately 4 seconds:  
LOW outdoor temperature alarm  
HIGH outdoor temperature alarm  
Default alarm values:  
Temperature  
alarm  
Low  
High  
32ºF  
86ºF  
LOW OUTDOOR TEMPERATURE ALARM SETTING  
Note:  
The outdoor temperature alarm can only be set for channel 1 sensor.  
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To set the LOW outdoor temperature alarm (default OFF):  
1.  
Press and hold the ALARM key for about 3 seconds to enter the  
alarm setting mode.  
alarm icon  
(low alarm)  
alarm value  
Weather alarm  
indicator  
The On/ Off  
icon is flashing  
2.  
3.  
Press the MAX/+ or MIN/- key to set the alarm ON or OFF.  
Press the SET key to enter the alarm value setting (alarm value  
flashing)  
4.  
5.  
Use the MAX/+ or MIN/- key to set the alarm value.  
Press the SET key to confirm and enter the HIGH outdoor  
temperature alarm setting.  
HIGH OUTDOOR TEMPERATURE ALARM SETTING  
alarm icon  
(high alarm)  
alarm value  
Weather alarm  
indicator  
The On/Off  
icon is flashing  
1. The On/ Off icon is flashing. Press the MAX/+ or MIN/- key to  
activate the alarm ON/OFF.  
2. Press the SET key to enter the alarm value setting (alarm value  
flashing)  
3. Use the MAX/+ or MIN/- key to set the alarm value.  
4. Press the SET key to confirm and enter the HIGH outdoor  
temperature alarm setting.  
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Note:  
The outdoor temperature alarm is only applicable to Channel 1.  
The alarm icon “ “ (outdoor high alarm) or “ “ (outdoor low  
alarm) will be shown in normal display when the weather alarm is  
set ON.  
When the alarming outdoor temperature is reached, the alarm will sound.  
The weather alarm indicator , high or low alarm icon and the  
temperature reading will be flashing on LCD. The alarm will sound for  
120 seconds if no one stops the alarm. User may press any key to stop  
the buzzer ringing. Then the weather alarm indicator, alarm icon and the  
temperature reading will be still flashing but the sound is stopped.  
If the alarm key is not pressed, the weather alarm indicator will keep  
flashing, indicating that alarm temperature has been reached before.  
User may press the Alarm key once to switch off the weather alarm  
indicator.  
WEATHER ALARM OPERATIONS  
WEATHER ALARMS  
The Weather alarms are selectable for when certain weather conditions  
are met according to the user’s requirements. For example, the user can  
set the thresholds for the outdoor temperature to +104°F (+40ºC) (high)  
and +14ºF  
(-10°C) (low), while only enabling the high alarm and disabling the low  
alarm (i.e. temperatures < +14ºF (-10°C) won’t trigger alarm, but  
temperatures > +104ºF (+40°C) will).  
Alarm setting  
Minimum  
Maximum  
Outdoor Temperature  
-40°F (40ºC)  
+139.8°F (59.9ºC)  
HYSTERESIS  
To compensate for fluctuation of the measured data, which may cause  
the weather alarm to sound constantly if the measured reading is close  
to user set level, a hysteresis function has been implemented for each  
weather alarm. For example, if the high temperature alarm is set to  
+77°F (+25°C) and the current value moves to +77°F (+25°C), the alarm  
will be activated (if it has been enabled). Now when the temperature  
drops to +76.8°F (+24.9°C) or below and thereafter again increases to  
beyond +78°F (+25°C), the data will be blinking, but no alarm will be  
activated. It has to drop to below +75.2°F (+24°C) (with a pre-set  
hysteresis of 2ºF (1°C)) so that the alarm can be produced again.  
Hysteresis values for the various weather data types are given in the  
following table:  
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Weather data  
Temperature  
Humidity  
Hysteresis  
2°F  
3% RH  
Air pressure  
0.03 inHg  
WEATHER FORECAST AND WEATHER TENDENCY:  
WEATHER FORECASTING ICONS:  
There are 4 weather icons in the fourth section of LCD which can be  
displayed in any of the following combinations:  
Cloudy with  
sunny  
Cloudy  
Rainy  
Sunny  
intervals  
For every sudden or significant change in the air pressure, the weather  
icons will update accordingly to represent the change in weather. If the  
icons do not change, then it means either the air pressure has not  
changed or the change has been too slow for the intelligent weather  
station to register. However, if the icon displayed is a sun or rainy, there  
will be no change of icon if the weather gets any better (with sunny icon)  
or worse (with rainy icon) since the icons are already at their extremes.  
The icons displayed forecasts the weather in terms of getting better or  
worse and not necessarily sunny or rainy as each icon indicates. For  
example, if the current weather is cloudy and the rainy icon is displayed,  
it does not mean that the product is faulty because it is not raining. It  
simply means that the air pressure has dropped and the weather is  
expected to get worse but not necessarily rainy.  
The change of weather forecast icon is in agreement with the  
relationship between current relative pressure and the pressure change  
in the last three hours.  
If the weather is changing, both old weather icon and new weather icon  
will be shown with a weather tendency indicator (animated arrows). If  
the weather has not changed within 6 hours, only the new weather icon  
in the middle display will be shown.  
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Examples of changing weather icons:  
Note:  
After initial set up of the intelligent weather station with the setting of the  
relative value, readings for weather forecasts should be disregarded for  
the next 12-24 hours. This will allow sufficient time for the intelligent  
weather station to collect air pressure data at a constant altitude and  
therefore result in a more accurate forecast.  
If the intelligent weather station is moved to another location significantly  
higher or lower than its initial standing point (for example from the  
ground floor to the upper floors of a house), set again the relative air  
pressure value, and discard the weather forecast for the next 12-24  
hours. By doing this, the intelligent weather station will not mistake the  
new location as being a possible change in air-pressure when really it is  
due to the slight change of altitude.  
AIR PRESSURE TENDENCY INDICATOR  
The air pressure tendency indicators are located on the left side of the  
air pressure display, below the weather icons, and they work  
independently from the weather forecast icons. The air pressure  
tendency indicator pointing upward or downward directions is displayed  
based on comparing the difference of the air pressure recorded during a  
full hour time frame.  
Note:  
An upward air pressure tendency indicator means that there is an  
increase in air pressure within the past 4 hours.  
A downward air pressure tendency indicator means that there is  
an decrease in air pressure within the past 4 hours.  
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AIR PRESSURE  
The fifth section of the LCD shows the relative air pressure and the air  
pressure history.  
Air pressure  
changes in hPa  
Air pressure over the last 12 hours  
The reference relative air pressure can be set between 28.35 to 30.72  
inHg (960 to 1040hPa). See “Relative pressure value setting” in  
manual setting.  
BAR GRAPH DISPLAY  
You may select to display the history of the air pressure in the form of a  
graph consisting of vertical bars on the intelligent weather station LCD.  
AIR PRESSURE HISTORY  
The bar graph of the electronic barometer shows the air pressure history  
for the past 12 hours in 7 steps.  
4.5hPa  
3hPa  
1.5hPa  
0hPa  
-1.5hPa  
-3hPa  
-4.5hPa  
-12 h  
-9h  
-6h  
-3h  
-2h  
-1h  
0h  
The horizontal axis represents the last 12 hours air pressure recordings  
(-12, -6, -5, -4, -3, -2, -1, and 0 hour, from right to left). The bars are  
plotted at each of the 7 steps and give the trend over the recorded  
period. The scale on the right compares the result. The 0in the middle  
of this scale determines the current air pressure.  
The vertical axis represents the air pressure changes in hPa (4.5, 3, 1.5,  
“0” represents the current air pressure). Each change (±1.5, ±3, ±4.5;  
the other values are not shown on the vertical axis but can be  
determined) shows in inches of mercury (hPa), how high or low the past  
air pressure was as compared to the current one. Rising bars indicate  
the weather is getting better due to an increase in air pressure. A  
downward sloping bars indicates a drop of the air pressure and the  
weather is expected to get worse from the present time 0.  
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At every full hour the current air pressure is used as a basis for the  
display of a new graph bar. The existing graph is then moved one bar to  
the left.  
Note:  
For accurate barometric pressure trend, the intelligent weather station  
should operate at the same altitude. For example, it should not be  
moved from the ground to the second floor of the house. Should the unit  
be moved to a new location, discard readings for the next 48 – 60 hours.  
LOW BATTERY INDICATOR  
The low battery indicator will be displayed in the LCD when the battery  
power of the intelligent weather station is low. It is recommended to  
replace the batteries in all units on an annual basis to ensure optimum  
accuracy of the intelligent weather station.  
Note: After battery change, both the intelligent weather station and the  
sensor(s) need to be reset (see note ”Setting up”)  
WEATHER INFORMATIONDISPLAY  
The weather information display located at the last section of the LCD  
will display the weather forecast based on data received from channel 1  
and the air pressure.  
The intelligent weather station will automatically display the following  
information:  
Maximum temperature of the day  
Minimum temperature of the day  
Probability of the weather forecast  
Time frame for the weather forecast  
Probability of snowfall  
Probability of fog  
Probability of glazed frost  
Probability of tempest  
Probability of strong wind  
Probability of storm  
Forecast for lowest night temperature  
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German  
English  
French  
Italian  
Spanish  
DETAILED INFORMATION SHOWN IN THE WEATHER DISPLAY:  
Language selected  
English  
German  
French  
Italian  
Spanish  
Timeframe for Forecast  
Vorhersageda Period  
Durata prev.  
6 ore  
Periodo prev.  
6 horas  
weather  
forecast  
period  
6 hours  
uer  
prevision  
6 Stunden  
12 Stunden  
24 Stunden  
36 Stunden  
48 Stunden  
Prognose  
Index 65%  
6 heures  
12 hours  
24 hours  
36 hours  
48 hours  
Forecast  
Index 65%  
12 heures  
24 heures  
36 heures  
48 heures  
Prévision  
Index 65%  
12 ore  
24 ore  
36 ore  
48 ore  
Indice  
Previsione  
65%  
12 horas  
24 horas  
36 horas  
46 horas  
Indice  
Probability of  
weather  
Prevision 65%  
forecast  
Index 70%  
Index 75%  
Index 80%  
Index 85%  
MaxTemp  
xx.xºF  
Today xx :xx  
MinTemp  
xx.xºF  
Today xx :xx  
Snowfall  
Index 65%  
Index 75%  
Index 70%  
Index 75%  
Index 80%  
Index 85%  
MaxTemp  
xx.xºF  
Heute xx :xx  
MinTemp  
xx.xºF  
Heute xx :xx  
Schnee  
Index 65%  
Index 75%  
Index 70%  
Index 75%  
Index 80%  
Index 85%  
MaxTemp  
xx.xºF  
Du Jour xx :xx Oggi xx :xx  
MinTemp  
xx.xºF  
Du Jour xx :xx Oggi xx :xx  
Neige  
Index 65%  
Index 75%  
Indice 70%  
Indice 75%  
Indice 80%  
Indice 85%  
TempMax  
xx.xºF  
Indice 70%  
Indice 75%  
Indice 80%  
Indice 85%  
TempMax  
xx.xºF  
Hoy xx : xx  
TempMin  
xx.xºF  
Hoy xx :xx  
Indice  
Nieve 65%  
Nieve 75%  
Maximum  
temperature  
of the day  
Minimum  
temperature  
of the day  
Probability of  
snowfall  
TempMin  
xx.xºF  
Indice  
Neve 65%  
Neve 75%  
Probability of  
fog  
Fog  
Nebel  
Brouillard  
Index 80%  
Index 85%  
Givre  
Indice  
Indice  
Index 80%  
ndex 85%  
Glazed frost  
Index 75%  
Index 80%  
Index 85%  
Rauhreif  
Index 75%  
Nebbia 80%  
Indice 85%  
Indice  
Niebla 80%  
Indice 85%  
Indice  
Probability of  
glazed frost  
Index 75%  
Brina 75%  
Escarcha 75%  
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Probability of  
tempest  
Probability of  
strong winds  
Tempest  
Gewitter  
Orage  
Indice  
Indice  
Index 80%  
Strong wind  
Index 80%  
Index 80%  
Starkwind  
Index 80%  
Index 80%  
Vent Fort  
Index 80%  
Temporal 80% Tormenta 80%  
Indice  
Vento forte  
80%  
Indice viento  
Forte 80%  
Probability of  
storm  
Storm  
Index 75%  
Sturm  
Index 75%  
Tempête  
Index 75%  
Indice  
Indice  
Tempesta 75% Tempestad  
75%  
Forecast  
lowest night  
temperature  
Forecast  
lowest  
Nighttemp xxºF xxºF  
Min Erwartete  
Nachttemp  
Prevision temp Previsione  
Min nuit xxºF temp  
Prevision temp  
Min noche  
Min notte xxºF xxºF  
Note:  
The forecast period, forecast index, and today’s  
maximum/minimum temperature will always be shown on the  
LCD.  
The Forecast lowest night temperature will be displayed between  
8:00 pm to 6:00 am  
Other information will be show when a specific weather event  
happened that has been calculated by the unique algorithm of the  
intelligent weather station.  
REMOTE TEMPERATURE/HUMIDITY SENSOR / 915MHZ  
RECEPTION CHECK  
The outdoor temperature and humidity is measured and transmitted  
about every 4 seconds.  
The transmission range of the remote temperature/humidity sensor may  
be affected by the ambient temperature. At cold temperatures the  
transmitting distance may be decreased. Please bear this in mind when  
placing the sensor.  
The remote temperature sensor should be placed in a dry, shaded area.  
The remote temperature sensor has a range of 330 feet. Keep in mind  
that the 330 feet is in open air with no obstructions and that radio waves  
DO NOT curve around objects. Actual transmission range will vary  
depending on what is in the path of the signal. Each obstruction (roof,  
walls, floors, ceilings, thick trees, etc.) will effectively cut signal range in  
half.  
Example: A wireless weather station receiver with a 330 feet range is  
mounted on an interior wall, so that the signal has to pass through one  
interior wall, one exterior wall, and across the 10 foot width of the room  
between the 2 walls. The first wall will reduce the range to 165 feet, and  
the second wall will reduce the range to 87 feet. Factoring in the 10 foot  
room, this leaves a maximum of 77 feet of remaining signal range.  
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This allowance is typically enough for a frame wall with non-metallic  
siding; however certain materials can reduce range even further. Metal  
siding, stucco, and some types of glass can reduce signal range by as  
much as ¾ or more, compared to the ½ reduction typical of most  
obstructions. It is possible to receive a signal through these materials,  
however maximum range will be much less due to their tendency to  
absorb or reflect a much larger portion of the sensor’s signal.  
If the outdoor temperature and humidity data are not being received  
within 2 minute after setting up (or the outdoor display show “--.-“ in the  
outdoor section of the intelligent weather station after  
failed attempts during normal operation). Please check the following  
points:  
1.  
The distance of the intelligent weather station or remote  
temperature/humidity sensor should be at least 3 to 6 feet (1.5 to  
2 meters) away from any interfering sources such as computer  
monitors or TV sets.  
2.  
3.  
Avoid positioning the intelligent weather station onto or in the  
immediate proximity of metal doors or window frames.  
Using other electrical products such as headphones or speakers  
operating on the same signal frequency (915MHz) may prevent  
correct signal transmission and reception.  
3.  
4.  
Neighbors using electrical devices operating on the 915MHz  
signal frequency can also cause interference.  
“Visibility” of the intelligent weather station and remote  
temperature/humidity sensor (e.g. through a window) increases  
the range.  
Note:  
When the 915MHz signal is received, do not re-open the battery cover  
of either the remote temperature/humidity sensor or the intelligent  
weather station, as the batteries may spring free from the contacts and  
force a false reset. Should this happen accidentally then reset all units  
(see Setting up above) otherwise transmission problems may occur.  
If no reception is possible despite the observation of these factors, all  
system units have to be reset (see Setting up).  
POSITIONING THE INTELLIGENT WEATHER STATION:  
The intelligent weather station has been designed to be hung on a wall  
or free standing.  
For Free standing:  
Simply attached the stand to the bottom of the unit and  
place onto a flat surface.  
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To wall mount  
Choose a sheltered place. Avoid direct rain and sunshine.  
Before wall mounting, please check that the outdoor temperature and  
humidity values can be received from the desired locations.  
To wall mount:  
1.  
Fix a screw (not supplied) into the desired wall,  
leaving the head extended out the by about 0.2”  
(5mm).  
2.  
Fold the stand of the intelligent weather station  
by pushing inward and hang it onto the screw.  
Remember to ensure that it locks into place  
before releasing.  
POSITIONING THE REMOTE  
TEMPERATURE / HUMIDITY SENSOR:  
The remote temperature/humidity sensor can be placed onto any flat  
surface or wall mounted using the bracket which doubles as a stand or  
wall mount base.  
Table stand/wall  
mount bracket  
To wall mount:  
1.  
Secure the bracket onto a desired wall using the screws and  
plastic anchors.  
2.  
Clip the remote temperature/humidity sensor onto the bracket.  
Note:  
Before permanently fixing the remote temperature/humidity sensor wall  
base, place all units in the desired locations to check that the outdoor  
temperature and humidity readings are receivable. In event that the  
signal is not received, relocate the remote temperature/humidity sensor  
or move them slightly as this may help the signal reception.  
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CARE AND MAINTENANCE  
Extreme temperatures, vibration and shock should be avoided as  
these may cause damage to the units and give inaccurate forecasts  
and readings.  
When cleaning the display and casings, use a soft damp cloth only.  
Do not use solvents or scouring agents as they may mark the LCD  
and casings.  
Do not submerge the units in water.  
Immediately remove all low powered batteries to avoid leakage and  
damage. Replace only with new batteries of the recommended type.  
Do make any repair attempts to the units. Return it to their original  
point of purchase for repair by a qualified engineer. Opening and  
tampering with the units may invalidate their guarantee.  
Do not expose the units to extreme and sudden temperature  
changes, this may lead to rapid changes in forecasts and readings  
and thereby reduce their accuracy.  
SPECIFICATIONS  
Temperature measuring range:  
Indoor  
:
+40°F to +139.8°F with Accuracy +/- 0.2°F resolution  
-40ºC to +59.9ºC with Accuracy +/- 0.1ºC resolution  
(“OF.L” displayed if outside this range)  
Outdoor  
:
-39.8°F to +139.8°F with Accuracy +/- 0.2°F resolution  
-39.9ºC to +59.9ºC with Accuracy +/- 0.1ºC resolution  
(“OF.L” displayed if outside this range)  
Relative humidity measuring range:  
Indoor  
:
1% to 99% with 1% resolution  
(“- -” displayed when value < 1%; "99%"  
displayed if value 99%)  
1% to 99% with 1% resolution  
(“1%” displayed when value 1%; "99%" is  
played if value 99%)  
Outdoor  
:
Indoor temperature checking interval : every 20 seconds  
Indoor humidity checking interval  
Outdoor temperature reception  
Outdoor humidity reception  
Sensor checking interval  
Air pressure checking interval  
Transmission range  
:
:
:
:
:
:
every 20 seconds  
every 4 seconds  
every 4 seconds  
every 4 seconds  
every 20 seconds  
up to 300 feet (100 meters)  
(open space)  
Power supply:  
Intelligent Weather Station  
:
3 x AA batteries  
Remote temperature/humidity sensor : 2 x AA batteries  
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Battery life cycle  
:
approximately 12 months  
Alkaline batteries are recommended  
Dimensions (H x L x W)  
Intelligent Weather Station  
mm  
:
6.88” x 4.72” x 1.22” / 175 x 120 x 31  
Remote temperature/humidity sensor : 6.39” x 1.69” x 0.90” / 160 x 43  
x 23mm  
WARRANTY INFORMATION  
La Crosse Technology, Ltd provides a 1-year limited warranty on this  
product against manufacturing defects in materials and workmanship.  
This limited warranty begins on the original date of purchase, is valid  
only on products purchased and used in North America and only to the  
original purchaser of this product. To receive warranty service, the  
purchaser must contact La Crosse Technology, Ltd for problem  
determination and service procedures. Warranty service can only be  
performed by a La Crosse Technology, Ltd authorized service center.  
The original dated bill of sale must be presented upon request as proof  
of purchase to La Crosse Technology, Ltd or La Crosse Technology,  
Ltd’s authorized service center.  
La Crosse Technology, Ltd will repair or replace this product, at our  
option and at no charge as stipulated herein, with new or reconditioned  
parts or products if found to be defective during the limited warranty  
period specified above. All replaced parts and products become the  
property of La Crosse Technology, Ltd and must be returned to La  
Crosse Technology, Ltd. Replacement parts and products assume the  
remaining original warranty, or ninety (90) days, whichever is longer. La  
Crosse Technology, Ltd will pay all expenses for labor and materials for  
all repairs covered by this warranty. If necessary repairs are not  
covered by this warranty, or if a product is examined which is not in  
need or repair, you will be charged for the repairs or examination. The  
owner must pay any shipping charges incurred in getting your La  
Crosse Technology, Ltd product to a La Crosse Technology, Ltd  
authorized service center. La Crosse Technology, Ltd will pay ground  
return shipping charges to the owner of the product to a USA address  
only.  
Your La Crosse Technology, Ltd warranty covers all defects in material  
and workmanship with the following specified exceptions: (1) damage  
caused by accident, unreasonable use or neglect (including the lack of  
reasonable and necessary maintenance); (2) damage occurring during  
shipment (claims must be presented to the carrier); (3) damage to, or  
deterioration of, any accessory or decorative surface; (4) damage  
resulting from failure to follow instructions contained in your owner’s  
manual; (5) damage resulting from the performance of repairs or  
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alterations by someone other than an authorized La Crosse Technology,  
Ltd authorized service center; (6) units used for other than home use (7)  
applications and uses that this product was not intended or (8) the  
products inability to receive a signal due to any source of interference..  
This warranty covers only actual defects within the product itself, and  
does not cover the cost of installation or removal from a fixed  
installation, normal set-up or adjustments, claims based on  
misrepresentation by the seller or performance variations resulting from  
installation-related circumstances.  
LA CROSSE TECHNOLOGY, LTD WILL NOT ASSUME LIABILITY  
FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE, OR OTHER  
SIMILAR DAMAGES ASSOCIATED WITH THE OPERATION OR  
MALFUNCTION OF THIS PRODUCT. THIS PRODUCT IS NOT TO BE  
USED FOR MEDICAL PURPOSES OR FOR PUBLIC INFORMATION.  
THIS PRODUCT IS NOT A TOY. KEEP OUT OF CHILDREN’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, Ltd  
2809 Losey Blvd. S.  
La Crosse, WI 54601  
Phone: 608.782.1610  
Fax: 608.796.1020  
e-mail:  
(warranty work)  
(information on other products)  
web:  
Questions? Instructions? Please visit:  
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.  
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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.  
FCC ID: OMO-TX28U (sensor)  
FCC DISCLAIMER  
RFExposure mobil:  
The internal / external antennas used for this mobile sensor must provide a separation  
distance of at least 20 cm (8 inches) from all persons and must not be co-located or  
operating in conjunction with any other antenna or sensor."  
Statement according to FCC part 15.19:  
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 any interference received, including interference that may cause undesired operation.  
Statement according to FCC part 15.21:  
Modifications not expressly approved by this company could void the user's authority to  
operate the equipment.  
Statement according to FCC part 15.105:  
NOTE: This equipment has been tested and found to comply with the limits for a Class B  
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference in a residential installation. This  
equipment generates, uses and can radiate radio frequency energy and, if not installed and  
used in accordance with the instructions, may cause harmful interference to radio  
communications.  
However, there is no guarantee that interference will not occur in a particular installation. If  
this equipment does cause harmful interference to radio or television reception, which can  
be determined by turning the equipment off and on, the user is encouraged to try to correct  
the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the  
receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help  
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