La Crosse Technology TX21U Thermo-hygro Transmitter User Manual tx22u manual

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Manual

PROFESSIONAL WEATHER CENTER

WS-1610

Operation Manual

Table of Contents

Topic Page

Features 3

Setting up 6

Function keys 12

LCD Screen 14

Manual Setting 16

Time alarm setting 24

Weather alarm operations 25

Hysteresis 31

Weather forecast and weather tendency 32

Wind direction and wind speed measurement 36

Rainfall measurement 37

Viewing history data 37

Viewing the min/ max weather data 39

Switch On/ Off buzzer 46

Outdoor transmission 915 MHz reception 48

Positioning 49

Care and Maintenance 53

Specification 54

Warranty Info 57

PROFESSIONAL WEATHER CENTER

Instruction Manual

Congratulations on purchasing this state-of-the-art Professional Weather Center as an

example of excellent design and innovative technology. Featuring time, date,

calendar, weather forecast, wind direction and speed, rainfall, outdoor temperature

and outdoor humidity, air pressure and various alarm settings for different weather

conditions, this Weather Center will provide you with extensive weather information

and forecast.

INSTANT TRANSMISSION is the

state-of-the-art new wireless

transmission technology, exclusively

designed and developed by LA

CROSSE TECHNOLOGY. INSTANT

TRANSMISSION offers you an

immediate update (every 4.5

seconds!) of all your outdoor data

measured from the transmitters:

follow your climatic variations in

real-time!

This product offers:

FEATURES:

Weather Center

• Time display (manual setting)

• 12/24 hour time display

• Calendar display (weekday, date, month, year)

• Time alarm function

• Weather forecasting function with 3 weather icons and weather tendency

indicator

• Outdoor temperature display in ºF/°C

• Outdoor Humidity display as RH%

• MIN/MAX value of outdoor temperature and humidity display with time & date

of recording

Function keys

LCD

Foldout stand I

Foldout stand II

Battery compartment

cover

Hanging hole

• Low/High outdoor temperature and humidity alarm

• Relative air pressure displayed in inHg or hPa

• Air pressure tendency indicator for the past 12 hours (bargraph format)

• LCD contrast selectable

• Low battery indicator

• Wind direction displayed in 16 steps

• Wind speed displayed in mph, km/h, or m/s, and Beaufort scale

• Wind chill displayed in °F of °C

• Max wind speed displayed with time & date of recording

• High alarm function for wind speed

• Manual reset of outdoor temperature/ humidity, pressure and wind chill data

• Total rainfall displayed in mm or inch

• Storm warning alarm

• Buzzer on/off selectable

• Storage of 200 sets of history weather data recorded in 3-hour intervals

• Wireless transmission at 915 MHz

• Transmission range up to 330 feet (100 meters)

Thermo-hygro Sensor

• Remote transmission of the outdoor temperature and humidity

to the Weather Center at 915 MHz

• Weather-resistant casing

• Wall mounting case (to be mounted in a sheltered place. Avoid

direct rain and sunshine)

Wind Sensor

• Connected to the thermo-hygro sensor by cable

• Can be installed onto a mast or a horizontal panel

Rain Sensor

• Connected to the thermo-hygro sensor by cable

• To be mounted onto a horizontal panel

SETTING UP:

Note:

When putting the Weather Center into operation, it is important to perform in close

proximity (e.g. on a table) a complete wiring and set-up of the system. This step is

Cable connection between

the wind sensor and the

thermo-hygro sensor

Cable connection between

the rain sensor and the

thermo-hygro sensor

Wireless transmission at

915 MHz - thermo-hygro

sensor to the Weather

Center

Weather Center

Wind sensor

Rain senso

important to test all components for correct function before placing and mounting

them at their final destinations (See Positioning below)

1. Unwind the cables of the Rain and the Wind sensors. Connect the Rain and

the Wind sensors to the Thermo-hygro sensor by plugging the connector heads

of the two sensors into the appropriate sockets of the Thermo-hygro sensor.

2. First insert the batteries into the Thermo-hygro sensor (see “How to install

and replace the batteries into the Thermo-hygro sensor“ below).

3. Then insert the batteries into the Weather Center (see “How to install and

replace the batteries into the Weather Center” below). Once the batteries

are installed, all segments of the LCD will light up briefly and a short signal

tone will be heard. It will then display the time as 12:00, the date as 1.1.05, the

weather icons, and air pressure value. "- - -" will be shown for outdoor data.

4. Afterwards, the Weather Center will start receiving data from the transmitter.

The outdoor temperature, humidity wind chill and wind speed should then be

Sockets for wind

and rain sensor

displayed on the Weather Center. If this does not happen after 30 seconds, the

batteries will need to be removed from both units. You will have to start again

from step 1.

5. You may then check all cables for correct connection and all components for

correct function by manually turning the wind-gauge, moving the weather-vane,

tilting the rain sensor to hear the impact of the internally moving seesaw, etc

(See Positioning below).

6. Time and date shall be manually set (See Manual Setting below).

7. After the Weather Center has been checked for correct function with regard to

the above points and found fit, the initial set up of the weather station system is

finished and the mounting of the system components can take place. It must be

ensured however that all components work properly together at their chosen

mounting or standing locations. If e.g. there appear to be problems with the

915 MHz radio transmission, they can mostly be overcome by slightly changing

the mounting locations.

Note:

The radio communication between the receiver and the transmitter in the open field

reaches distances of max 330 feet, provided there are no interfering obstacles such

as buildings, trees, vehicles, high voltage lines, etc.

8. Radio interferences created by PC screens, radios or TV sets can in some

cases entirely cut off radio communication. Please take this into consideration

when choosing standing or mounting locations.

Note :

• After batteries are installed in the transmitter, install the batteries in the weather

center to receive the signal from the transmitter as soon as possible. If the

weather center is powered more than 5 hours after the transmitter is powered,

the weather center will never receive signal successfully from this transmitter.

In this case, user will need to reinstall the batteries from the transmitter to redo

set-up procedure.

• After batteries are installed, there will be synchronization between weather

center and the transmitter. At this time, the signal reception icon will be

blinking. When the signal is successfully received by the weather center, the

icon will be switched on. (If it is not successful, the icon will not be shown in

LCD) So the user can easily see whether the last reception was successful

(icon on) or not (icon off). On the other hand, the short blinking of the icon

shows that a reception is in progress.

• If the signal reception is not successful on the first frequency (915MHz) for 14

seconds, the frequency is changed to 920MHz and the learning is tried another

Transmitter signal

reception icon

14 seconds. If still not successful the reception is tried for 14 seconds on

910MHz. This will also be done for re-synchronization.

HOW TO INSTALL AND REPLACE THE BATTERIES INTO THE WEATHER

CENTER

The Weather Center works with 3 x AA, IEC LR6, 1.5V batteries. When the batteries

need to be replaced, the low battery symbol will appear on the LCD.

To install and replace the batteries, please follow the steps below:

1. Remove the battery compartment

cover.

2. Insert the batteries observing the

correct polarity (see the marking in

the battery compartment).

3. Replace the battery cover.

HOW TO INSTALL AND REPLACE THE BATTERIES INTO THE THERMO-HYGRO

SENSOR

The outdoor Thermo-hygro sensor works with 2 x “AA”, IEC LR6 1.5V batteries. To

install and replace the batteries, please follow the steps below:

1. Uninstall the rain cover of the transmitter.

2. Remover the battery compartment cover.

3. Insert the batteries, observing the correct polarity (see

the marking in the battery compartment).

4. Replace the battery cover and the rain cover onto the

unit.

Note:

In the event of changing batteries in any of the units, all units need to be reset by

following the setting up procedures. This is because a random security code is

assigned by the thermo-hygro sensor at start-up and this code must be received and

stored by the Weather Center in the first 30 seconds 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 depot.

Note:

The stored History record will not be kept after the battery change is done on the

Weather Center.

FUNCTION KEYS:

Weather Center:

The Weather Center has 5 easy-to-use function keys.

SET key

• Press to enter manual setting modes: LCD contrast, Manual time setting, 12/24

hour time display, Calendar setting, ºF/ºC temperature unit, Wind speed unit,

Rainfall unit, Pressure unit, Relative pressure reference setting, Weather

MIN/MAX key

Set key

+ key

HISTORY key

LARM ke

Tendency Sensitivity Value setting, Storm warning sensitivity setting and Storm

Alarm On/Off setting

• In normal display mode, press and hold to switch on/off the Buzzer

• In the weather alarm setting mode, press and hold to adjust different alarm

value and switch the alarm On/Off

• Press to activate the reset mode when max or min record is shown

• Stop the alarm during the time alarm or weather alarm ringing

+ key

• Press to change the calendar display to the preset alarm time, date, weekday +

date or seconds in the time display

• Press to adjust (increase) the level of different settings

• Stop the alarm during the time alarm or weather alarm ringing

• Press to confirm to reset the max/min record

HISTORY key

• Press to display the weather data history records

• Stop the alarm during the time alarm or weather alarm ringing

• Press to exit manual setting mode and alarm setting mode

ALARM key

• Press to enter the time alarm and weather alarm setting mode

• Confirm particular alarm setting

• Press to exit the manual setting mode

• Stop the alarm during the time alarm or weather alarm ringing

• Press to exit max/ min record display mode

MIN/MAX key

• Press to display minimum and maximum records of various weather data

• Press to adjust (decrease) the level of different settings

• Stop the alarm during the time alarm or weather alarm ringing

LCD SCREEN

The LCD screen is split into 5 sections displaying the following information:

1. Time and date

2. Wind data

3. Outdoor temperature and humidity,

4. Air pressure and Rainfall data

5. Air pressure history and Weather forecast.

Outdoor temperature

in °F or ºC

Wind direction display and

wind speed in Beaufort

scale

Calendar display

Weather tendency

indicator

Time display

Time alarm icon

Air pressure

histogram

Outdoor relative

humidity in %

Weather forecast

icon

Relative air pressure

display in inHg or hPa

Wind speed in mph, km/h

or m/s

Wind Chill in °F or °C

Wind speed Hi/ Lo alarm

icon

Outdoor Humidity

alarm icon

Outdoor temp.

alarm icon

Total rainfall in inch or mm

Low battery

indicator

Transmitter signal

reception icon

Transmitter low battery

indicator

Buzzer off indicator

MANUAL SETTING:

The following manual settings can be changed once the SET key is pressed:

• LCD contrast setting

• Manual time setting

• 12/24 hour time display

• Calendar setting

• °F/ °C temperature unit setting

• Wind speed unit

• Rainfall unit setting

• Air pressure unit setting

• Relative pressure reference value setting

• Weather Tendency Sensitivity value

• Storm warning threshold value

• Alarm On/ Off setting

LCD CONTRAST SETTING

The LCD contrast can be set within 8 levels, from "LCD 1" to "LCD8" (default setting is

LCD 5):

1. Press the SET key, the contrast level digit will start flashing.

2. Use the + or MIN/MAX key to adjust the level of contrast.

3. Confirm with the SET key and enter the MANUAL TIME SETTING.

Digit flashing

MANUAL TIME SETTING:

You then may manually set the time of the clock by following the steps below:

1. The hour digit will start flashing.

2. Use the + or MIN/MAX key to set the hour.

3. Press the SET key to switch to the minutes. The minute digit will start flashing.

4. Use the + or MIN/MAX key to set the minute.

5. Confirm the time with the SET key and enter the 12/24 HOUR TIME DISPLAY

SETTING.

12/24 HOUR TIME DISPLAY SETTING:

The time can be set to view as 12-hour or 24-hour format. The default time display

mode is 12-h. To set to 24-h time display:

1. Use the + or MIN/MAX key to toggle the value.

Minutes flashing

Hou

flashing

Digit flashing

Year

"Date. Month." (for 24h time display)

"Month. Date." (for 12h time display)

2. Confirm with the SET key and enter the CALENDAR SETTING.

CALENDAR SETTING:

The date default of the Weather Center is 1. 1. of year 2005. The date can be set

manually by proceeding as follows.

1. The year digit starts flashing.

2. Use the + or MIN/MAX key to set the year. The range runs from "00" (2000) to

"99" (2099).

3. Press the SET key to confirm the year and enter the month setting. The month

digit will start flashing.

4. Use the + or MIN/MAX key to set the month.

5. Press the SET key to confirm the month and enter the date setting mode. The

date digit will start flashing.

6. Use the + or MIN/MAX key to set the date.

7. Confirm all calendar settings with the SET key and enter the °F/°C

TEMPERATURE UNIT SETTING.

°F/°C TEMPERATURE UNIT SETTING

The temperature display can be selected to show temperature data in °F or °C.

(default °F)

1. The temperature unit is flashing

2. Use the + or MIN/MAX key to toggle between “°F” or “°C”.

Confirm with the SET key and enter the WIND SPEED UNIT SETTING

WIND SPEED UNIT SETTING

The wind speed unit can be set as mph (mile per hour), km/h (kilometer per hour), or

m/s (meter per second). The default unit is mph.

1. Use the + or MIN/MAX key to toggle between the unit “mph”, “km/h” or “m/s”

2. Confirm with the SET key and enter the RAINFALL UNIT SETTING.

Flashing

RAINFALL UNIT SETTING

The total rainfall unit can be set as inch or mm. The default unit is inch.

1. Use the + or MIN/MAX key to toggle between the unit “inch” or “mm”

2. Confirm the unit with the SET key and enter the RELATIVE AIR PRESSURE

UNIT SETTING

RELATIVE AIR PRESSURE UNIT SETTING

The relative air pressure can be set as inHg or hPa. The default unit is inHg.

1. Use the + or MIN/MAX key to toggle between the unit “inHg" or “hPa”

2. Confirm the unit with the SET key and enter the RELATIVE PRESSURE

REFERENCE VALUE SETTING.

Flashing

RELATIVE PRESSURE REFERENCE VALUE SETTING

Note:

The default reference pressure value of the barometer is 29.91inHg when batteries

are first inserted. 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 current atmospheric pressure of your home area (Local weather

service, www, optician, calibrated instruments in public buildings, airport).

The relative air pressure can be manually set to another value within the range of

27.17 to 31.90 inHg (919 to 1080 hPa) for a better reference.

1. The current relative pressure value will start flashing

2. Use the + or MIN/MAX key to increase or decrease the value. Continually

holding the key will allow the value to increase faster.

3. Confirm with the SET key and enter the WEATHER TENDENCY SENSITIVITY

VALUE SETTING.

Flashing

Note:

This feature is useful for those who live at elevations above sea level, but want their

air pressure display to be based on sea level elevation.

WEATHER TENDENCY SENSITIVITY LEVEL SETTING

You may select a definite switching sensitivity value, .06, .09, or .12 inHg for the

change in the display of weather icons. This represents the "sensitivity" of the weather

forecast (the smaller the value selected, the more sensitive the weather forecast).

The default value is 0.09 inHg.

1. The sensitivity value will start flashing

2. Use the + or MIN/MAX key to select the value.

3. Confirm with the SET key and enter the STORM WARNING SENSITIVITY

SETTING.

Flashing

STORM WARNING THRESHOLD VALUE SETTING

You may also define a switching sensitivity value for the Storm warning display at a

decrease of air pressure from .09 inHg to .27 inHg over 6 hours (Default 0.15 inHg).

1. The sensitivity value will start flashing.

2. Use the + or MIN/MAX key to select the value.

3. Confirm with the SET key and enter the STORM ALARM ON/OFF SETTING.

STORM ALARM ON/ OFF SETTING

You may also choose to switch On or Off the acoustic Storm warning alarm (Default

OFF).

1. The digit "AOF" will start flashing.

2. Use the + key to switch On or Off the alarm. ("AOF" = OFF; "AON" = On)

3. Confirm with the SET key and the normal display mode will be shown.

Flashing

larm-On icon

Note:

In case a storm warning alarm is activated, the downward weather tendency arrow will

be flashing. (Also see WEATHER TENDENCY INDICATOR below)

TO EXIT THE MANUAL SETTING MODE

To exit the manual setting anytime during the manual setting modes, press the

ALARM key (or HISTORY key) or wait for the automatic timeout. The mode will return

to the normal time display.

TIME ALARM SETTING

The alarm time can be set by the use of the ALARM and SET key.

1. Press the ALARM key once. The “ALARM” icon and time digits are shown at the

top right of the LCD.

2. Press and hold the SET key for about 2 seconds. The hour digit of the alarm

time will start flashing. Press the + or MIN/MAX key to set the hour of the alarm

time.

3. Press the SET key to confirm and advance to the minute setting. The minute

digit will be flashing.

larm time

digit

4. Press the + or MIN/MAX key to set the minute of the alarm time. Press the

ALARM key to confirm. Wait for about 30 seconds and the display will return to

normal display mode automatically.

5. In the normal display mode, press the ALARM once key to go to the time alarm

setting mode again. Then press shortly the SET key to switch on or off the time

alarm. (The showing of the icon (((y))) means that the time alarm is switched on.)

6. Press the HISTORY key or wait for about 30 seconds and the display will return

to normal display mode automatically.

Note:

The alarm ringing duration is 2 minutes. To stop the alarm, press any key during the

alarm ringing.

WEATHER ALARM OPERATIONS

The Weather alarms can be set when certain weather conditions are met according to

your requirements. For example, you can set the thresholds for the outdoor

temperature to +104°F (high) and 14°F (low), while only enabling the high alarm and

disabling the low alarm (i.e. temperatures <14°F won’t trigger alarm, but temperatures

>+104°F will).

The Weather Center can be set to alert when a specific weather condition is reached.

The following Weather Alarm settings can be adjusted in the ALARM setting

mode.

• High outdoor temperature alarm

• Low outdoor temperature alarm

• High outdoor humidity alarm

• Low outdoor humidity alarm

• High wind speed alarm

High wind

speed Alarm-

On icon

Outdoor humidity

larm-On icon

Outdoor temp

Alarm-On icon

Default alarm values:

Low 32°F

Temperature High 104°F

Low 45% Relative

Humidity High 70%

Wind speed High 62.0mph

HIGH AND LOW OUTDOOR TEMPERATURE ALARM SETTING

Note:

The High and Low outdoor temperature alarm can be set On/Off independently,

according to your needs.

Set the Outdoor temperature alarm value (High or Low alarm value) :

1. In the normal display mode, press the ALARM key twice. The High Outdoor

Temperature alarm display will be shown.

High alarm

icon

Alarm-On

icon

2. Press and hold the SET key for about 2 seconds. The temperature digit will

start flashing. Press the + or MIN/MAX key to set the high outdoor temp alarm

value. (Keep holding the key will allow the value to increase faster.)

3. Press the ALARM key to confirm the setting. The digit will stop flashing. Press

the SET key to switch on or off the alarm. (The showing of the icon (((y)))

means that the alarm is switched on.)

4. Press the ALARM key once. The Low Outdoor Temperature alarm display will

be shown.

5. Press and hold the SET key for about 2 seconds. The temperature digit will

start flashing. Press the + or MIN/MAX key to set the low outdoor temp alarm

value. (Keep holding the key will allow the value to increase faster.)

6. Press the ALARM key to confirm the setting. The digit will stop flashing. Press

the SET key to switch on or off the alarm. (The showing of the icon (((y)))

means that the alarm is switched on.)

7. Press the HISTORY key or wait for about 30 seconds and the display will

return to normal display mode automatically.

In case the temperature value meets the condition for high alarm or low alarm, the

value will be blinking, along with the corresponding icon ("HI AL"/ "LO AL").

And the buzzer will ring for 2 minutes. User then may press any key to stop the ring.

User may quit the alarm setting and return to the normal display mode by pressing the

HISTORY key.

HIGH AND LOW OUTDOOR HUMIDITY ALARM SETTING

Note:

The High and Low outdoor humidity alarm can be set On/Off independently according

to your needs.

Set the Outdoor temperature alarm value (High or Low alarm value):

1. In the normal display mode, press the ALARM key 4 times. The High Outdoor

Humidity alarm display will be shown.

2. Press and hold the SET key for about 2 seconds. The humidity digit will start

flashing. Press the + or MIN/MAX key to set the high outdoor humidity alarm

value.

3. Press the ALARM key to confirm the setting. The digit will stop flashing. Press

the SET key to switch on or off the alarm. (The showing of the icon (((y)))

means that the alarm is switched on.)

4. Press the ALARM key once. The Low Outdoor humidity alarm display will be

shown.

5. Press and hold the SET key for about 2 seconds. The humidity digit will start

flashing. Press the + or MIN/MAX key to set the low outdoor humidity alarm

value.

6. Press the ALARM key to confirm the setting. The digit will stop flashing. Press

the SET key to switch on or off the alarm. (The showing of the icon (((y)))

means that the alarm is switched on.)

7. Press the HISTORY key or wait for about 30 seconds and the display will

return to normal display mode automatically.

In case the humidity value meets the condition for high alarm or low alarm, the value

will be blinking, along with the corresponding icon ("HI AL"/ "LO AL"). And the buzzer

will ring for 2 minutes. User may press any key to stop the sound.

WIND SPEED ALARM SETTING

The High wind speed alarm can be set by following the steps below.

1. In the normal display mode, press the ALARM key six times. The High wind

speed alarm display will be shown.

2. Press and hold the SET key for about 2 seconds. The wind speed digit will start

flashing. Press the + or MIN/MAX key to set the high wind speed alarm value.

3. Press the ALARM key to confirm the setting. The digit will stop flashing. Press

the SET key to switch on or off the alarm. (The showing of the icon (((y)))

means that the alarm is switched on.)

4. Press the ALARM key once to return to the normal display mode.

In case the wind speed exceeds the condition for high wind speed alarm, the value

will be flashing, along with the corresponding high alarm icon ("HI AL"). And the

buzzer will ring for 2 minutes. User may press any key to stop the sound.

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 your set level, a

hysteresis function has been implemented for each weather alarm. For example, if the

high temperature alarm is set to +77°F and the current value moves to +77°F, the

alarm will be activated (if it has been enabled). Now when the temperature drops to

+76.8°F or below and thereafter again increases to beyond +77°F, the data will be

blinking, but no alarm will be activated. It has to drop to below +75.2°F (with a pre-set

hysteresis of 1.8°F) so that the alarm can be produced again. Hysteresis values for

the various weather data types are given in the following table:

Weather data Hysteresis

Temperature 1.8°F

Humidity 3% RH

Wind speed 3.1 mph

Note:

The temperature or humidity data will keep on flashing even after a key has been

pressed to stop the alarm or buzzer has been switched off, to indicate that the current

weather condition is out of the pre-set limit(s)

WEATHER FORECAST AND WEATHER TENDENCY

WEATHER FORECASTING ICONS:

Weather forecasting icons is displayed in any of the following combinations at the

right bottom part of LCD:

For every sudden or significant change in the air pressure, the weather icons will

update accordingly to represent the change in weather.

(Every time a new average pressure value has been obtained (once per minute), this

value is compared with an internal reference value. If the difference between these

values is bigger than the selected weather tendency sensitivity, the weather-icon

changes, either for worse or for better. In this case, the current pressure value

becomes the new weather tendency reference.)

If the icons do not change, either the air pressure has not changed or the change has

been too small for the Weather Center to register. So you may adjust the "sensitivity"

of the pressure change checking in the setting mode –see WEATHER TENDENCY

SENSITIVITY VALUE SETTING above.

Sunny

TENDENCY

Cloudy with sunny

intervals

TENDENCY

Rainy

TENDENCY

However, if the icon displayed is a sun or raining cloud, 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.

Note:

After setting up, readings for weather forecasts should be disregarded for the next 12-

24 hours. This will allow sufficient time for the Weather station to collect air pressure

data at a constant altitude and therefore result in a more accurate forecast.

Common to weather forecasting, absolute accuracy cannot be guaranteed. The

weather forecasting feature is estimated to have an accuracy level of about 75% due

to the varying areas the Weather Center has been designed for use. In areas that

experience sudden changes in weather (for example from sunny to rain), the Weather

Center will be more accurate compared to use in areas where the weather is stagnant

most of the time (for example mostly sunny).

If the Weather Center 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), discard the weather forecast for the next 48-60 hours, as the Weather Center

may mistake the new location as being a possible change in air-pressure when really

it is due to the slight change of altitude.

WEATHER TENDENCY INDICATOR

Working together with the weather icons is the weather tendency indicators (arrow

located on the left and right sides of the weather icons). When the indicator points

upwards, it means that the air-pressure is increasing and the weather is expected to

improve, but when indicator points downwards, the air-pressure is dropping and the

weather is expected to become worse.

Taking this into account, one can see how the weather has changed and is expected

to change. For example, if the indicator is pointing downwards together with cloud and

sun icons, then the last noticeable change in the weather was when it was sunny (the

sun icon only). Therefore, the next change in the weather will be cloud with rain icons

since the indicator is pointing downwards.

Note:

Once the weather tendency indicator has registered a change in air pressure, it will

remain permanently visualized on the LCD.

AIR PRESSURE HISTORY (ELECTRONIC BAROMETER WITH BAROMETRIC

PRESSURE TREND)

The bottom section of the LCD also shows the relative air pressure value and the air

pressure history.

Depending on programming conditions, display of the history of air pressure in form of

a graph consisting of vertical bars.

The bar graph of the electronic barometer shows the air pressure history of the past

12 hours in five 3-hour steps.

The horizontal axis represents the last 12 hours air pressure recording (-12, -9, -6, -3

and 0 hour). The bars are plotted at each of the 5 steps and give the trend over the

recorded period. The scale on the right compares the result. The "0" in the middle of

this scale determines the current air pressure.

The vertical axis represents the air pressure changes in inHg (+0.12, +0.06, 0, -0.06, -

0.12. The “0” represents the current air pressure). The newly measured pressure was

compared to the previously recorded pressure reading. The pressure change

is expressed by the difference between the current ("0h") and the past readings in

division of ±2 hPa or ±0.06 inHg. If the bars are rising it indicates that the weather is

getting better due to an increase in air pressure. If the bars go down it indicates a

drop of the air pressure and the weather is expected to get worse from the present

time "0".

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 column to the left.

Air pressure

changes in inHg

ir pressure

changes in hPa

Note:

For accurate barometric pressure trend, the Weather Center should operate at the

same altitude. For example, it should not be moved. Should the unit be moved, for

instance from the ground to the second floor of the house, the readings for the next

12-24 hours shall be discarded.

WIND DIRECTION AND WIND SPEED MEASUREMENT

In normal display mode, the second section of the LCD shows the following wind data.

• Wind direction (shown on the a compass scale of 16 divisions) and wind speed

in Beaufort scale

• Wind chill in °F or °C

• Wind Speed in mph, km/h or m/s

Pointer indicates the

currently detected wind

direction

Text showing wind speed in

Beaufort scale

Wind speed

This alarm symbol

indicates that the alarm is

set On

Wind chill

RAINFALL MEASUREMENT

The total rainfall measurement is displayed in the fourth section of the LCD, in the unit

of mm or inch. (see VIEWING THE MIN/MAX WEATHER DATA below)

VIEWING THE HISTORY DATA

The Weather Center can store up to 200 sets of weather data which are recorded

automatically at 3-hour intervals after the weather station is powered up, at the

nearest time of 0:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00 and 21:00. For

instance, if user has manually set the time as 14:52 after installing batteries, the first

history record will be made at the coming 15:00 automatically. Then the second

record will be on 18:00 and so on.

Each weather record includes the Wind direction, Wind speed in Beaufort scale, Wind

chill temperature, wind speed, Outdoor temperature and humidity, relative pressure

and total rainfall, pressure history and weather tendency. Also, the time and date of

recording will be displayed.

Note:

In order to acquire the correct time of recording of the history records, you shall

manually set the current time as soon as installing batteries to the Weather Center.

Afterwards, you should avoid changing the pre-set time as it will also alter the

recorded "time of recording" of each history record, which may lead to confusion.

To view the weather history:

1. Press the HISTORY key. The latest weather record will be shown with the date

and time of recording. The "HISTORY" icon will be displayed at the bottom of

the LCD.

HISTORY icon

2. Press MIN/ MAX to view older records.

(Press MIN/MAX and + key to view "Previous" and "Next" record respectively.

The records are made at 3-hour intervals)

Note:

• The stored history records will not be retained after battery change or whenever

battery is removed.

• The total rainfall value will be exhibited in whole number (no decimal place) in

the history record.

VIEWING THE MIN/MAX WEATHER DATA

The Weather Center will record the maximum and minimum value of the various

weather data with time and date of recording automatically. The following stored

MIN/MAX weather data can be viewed by pressing the MIN/MAX key in normal

display mode.

1. Min outdoor temperature with the date and time of recording

2. Max outdoor temperature with the date and time of recording

3. Min outdoor humidity with the date and time of recording

MIN icon

MIN outdoor

temperature

value

Time and date o

recording

4. Max outdoor humidity with the date and time of recording

MAX icon

MAX outdoor

humidity value

Time and date or

recording

5. Min Wind chill temperature with the date and time of recording

6. Max Wind chill temperature with the date and time of recording

7. Min Relative pressure with the date and time of recording

MIN icon

MIN wind chill

value

Time and date or

recording

8. Max Relative pressure with the date and time of recording

MAX icon

MAX relative

pressure value

Time and date o

recording

9. Maximum wind speed

RESET THE MIN/MAX WEATHER DATA

To reset the aforementioned MIN/MAX weather data 1. to 9., you shall need to reset

each of the data independently.

1. Press MIN/MAX key to show the desired weather data. For instance, if you want

to reset the minimum humidity, in the normal display you shall press the

MIN/MAX key 3 times to show the min humidity value.

MAX icon

MAX wind speed

value

Time and date or

recording

2. Press and hold the SET key for about 2 seconds, then the "RESET" icon will

appear at the bottom part of the LCD.

3. Press the + key once, then the stored value will be reset to the current value and

current time.

4. Press the ALARM key to return to normal display mode.

10. Total rainfall amount

The total rainfall measurement is displayed in the fourth section of the LCD, in the unit

of mm or inch. It shows the total rainfall accumulated since last reset of the Weather

Center.

In normal display mode, press the MIN/MAX key 10 times to show the total rainfall

value. The "RESET" icon will also be shown at the same time.

Total rainfall

value

The total rainfall value is counted

from this time and date

To reset the rainfall reading, press the + key once when the Rainfall value and

"Reset" icon is shown. Then the total rainfall amount will be reset to 0, and the time

updated to current time.

Note:

After power up, the time and date and total rainfall is displayed as "- - -". After time is

adjusted manually, the set time will be shown.

SWITCHING ON/OFF THE BUZZER

User may choose to turn off the buzzer so that when the time alarm is switched on

and activated, the buzzer will not sound but we can still see the alarm icon (((y)))

flashing on the LCD for time alarm.

On the other hand, when the buzzer is turned off and any weather alarm is activated,

the particular weather digits will flash to show user that the weather condition is being

out of the preset threshold value, yet the buzzer will not sound.

To switch off the buzzer:

1. In normal display mode, press and hold the SET key until the icon "BUZZER

OFF" is shown at the right side above the Wind direction scale. The LCD will

change to setting mode.

2. Press ALARM key once to return to the normal display mode. The "BUZZER

OFF" icon will still be shown.

To re-enable the buzzer:

1. When the BUZZER OFF icon is shown on LCD, press the SET key shortly and

the BUZZER OFF icon will disappear.

2. Press ALARM key once to return to the normal display mode. The "BUZZER

OFF" icon will no longer be shown. Then the alarm will sound normally.

LOW BATTERY INDICATOR

The low battery indicator of the Weather Center and the Thermo-hygro sensor will be

displayed at the top and bottom portion of the LCD respectively when the battery

power is low. It is recommended to replace the batteries in all units on an annual

basis to ensure optimum accuracy of the system.

Note:

• After battery change, both the Weather Center and the Thermo-hygro sensor

need to be reset (see note ”Setting up”)

• The History data record will be clear after the battery change.

BUZZER OFF icon

OUTDOOR TRANSMITTER 915 MHz RECEPTION

The outdoor temperature, humidity, wind data and rainfall are transmitted from the

Thermo-hygro sensor every 4.5 seconds. The Weather Center will then be

synchronized to the Thermo-hygro sensor to receiver outdoor data. The transmission

range (up to 330 feet) of the Outdoor Thermo-hygro sensor may be affected by the

ambient temperature. At cold temperatures the transmitting distance may be

decreased. Please keep this in mind when placing the transmitter.

If the outdoor data are not being received within 30 seconds after setting up (or the

outdoor display shows “- - -“ in the outdoor section of the Weather Center after

consecutive failed attempts during normal operation). Please check the following

points:

1. The distance of the Weather Center or transmitter should be at least 5 to 6.5

feet away from any interfering sources such as computer monitors or TV sets.

2. Avoid positioning the Weather Center onto or in the immediate proximity of

metal doors or window frames.

3. Using other electrical products such as headphones, speakers, or cordless

phones operating on the same signal frequency (915 MHz) may prevent

correct signal transmission and reception.

4. Neighbors using electrical devices operating on the 915 MHz signal frequency

can also cause interference.

5. “Visibility” of Weather Center and Thermo-hygro sensor (e.g. through a

window) increases the range.

Note:

When the 915 MHz signal is received, do not re-open the battery compartment cover

of either the transmitter or Weather Center, 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.

During normal operation, after the outdoor display shows "- - -", the weather station

will change to receive the outdoor data every 15 minutes, until the data is read. Then

the reception period will return to 4.5 seconds.

If no reception is possible despite the observation of these factors, all system units

have to be reset (see Setting up).

POSITIONING

Prior to permanently affixing any of the units, please ensure the following points are

considered:

• Cable lengths of the units meet with your distance requirements at the point of

fixing

• Signals from the sensors can be received by the base station at points of

mounting

Weather Center

The Weather Center has been designed to be hung onto wall or free standing with the

2 kinds of foldout stand.

To wall mount

Choose a sheltered place, such as under the eve of a roof. 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 5mm.

2. Hang the Center onto the screw. Remember to ensure that

it locks into place before releasing.

Thermo-hygro Sensor

Rain Cove

Main Unit

Wall Bracket

An ideal mounting place for the Thermo-hygro sensor would be the outer wall beneath

the extension of a roof, as this will protect the sensor from direct sunlight and other

extreme weather conditions.

To wall mount, use the 2 screws to affix the wall bracket to the desired wall, plug in

the Thermo-hygro sensor to the bracket and secure both parts by the use of the

supplied screw and ensure that the cables from the wind and rain sensors are

correctly plugged in otherwise data transmission errors could occur.

Wind Sensor

Vertical

mast

Wind fan

Horizontal

panel

Wind vane

Firstly, check that the wind-fan and the wind-vane can rotate freely before fixing the

unit. For correct and accurate readings it is important to mount the sensor so that the

front (marked E) is pointing in East-West direction. The wind sensor should now be

mounted using the screw or cable tie provided onto a solid wall/ panel mast or mast to

allow the wind to travel around the sensor unhindered from all directions (ideal mast

size should be from diameter about 5/8” to 11/4”).

Once the wind sensor is fixed onto the mast, connect the cable to the corresponding

thermo-hygro sensor socket so that operating power supply can be received and data

can be transmitted to the base station.

Rain Sensor

For best results, the rain sensor should be securely mounted onto a horizontal surface

about 1 meter above the ground and in an open area away from trees or other

coverings where rainfall may be reduced causing inaccurate readings.

When securing into place, check that rain excess will not collect and store at the base

of the unit but can flow out between the base and the mounting surface (test by

pouring clean water).

After mounting the rain sensor, connect the cable to the thermo-hygro sensor at the

corresponding socket so power supply can be received and data be transmitted to the

base station

The rain sensor is now operable. For testing purposes, very slowly pour a small

amount of clean water into the rain sensor funnel. The water will act as rainfall and will

be received and displayed at the base station after about 2 minutes delay i.e. when

the reading interval is reached.

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:

Outdoor : -40°F to +139.8°F with 0.2°F resolution

-40ºC to +59.9ºC with 0.1ºC resolution

(“OF.L” displayed if outside this range)

Relative humidity measuring range:

Outdoor : 1% to 99% with 1% resolution

(“- -” displayed if < 1%, "99" displayed if ≥ 99%)

Wind speed : 0 to 111.8 mph (0 to 50 m/s)

(displayed "OF.L" when > 50m/s)

Wind chill : -40°F to +139.8°F (-40ºC to +59.9ºC)

(displayed "OF.L" if outside this)

Relative pressure pre-set range : 27.17 to 31.90 inHg (919 to 1080 hPa)

Rainfall : 0" to 393.6" (0 to 9999 mm) (displayed

"OF.L" when > 9999mm)

Outdoor data reception : every 4.5 seconds

Air pressure checking interval : every 15 seconds

Transmission range : up to 330 feet (100meters) in open space

Power:

Weather Center : 3 x AA, IEC LR6, 1.5V

Thermo-hygro sensor : 2 x AA, IEC LR6, 1.5V

Battery life : approximately 12 months (Alkaline batteries

recommended)

Dimensions (L x W x H)

Weather Station : 6.51" x 1.21" x 5.58" (165.4 x 30.8 x 141.9 mm)

Thermo-hygro transmitter : 2.25" x 2.44" x 6.18" (57.3 x 62 x 157 mm)

Wind sensor : 9.84" x 6.45" x 7.58" (250 x 164 x 192.7 mm)

Rain sensor : 5.51" x 2.75" x 5.39" (140 x 70 x 137 mm)

LIABILITY DISCLAIMER

• The electrical and electronic wastes contain hazardous substances. Disposal

of electronic waste in wild country and/or in unauthorized grounds strongly

damages the environment.

• Please contact your local or/and regional authorities to retrieve the addresses

of legal dumping grounds with selective collection.

• All electronic instruments must from now on be recycled. User shall take an

active part in the reuse, recycling and recovery of the electrical and electronic

waste.

• The unrestricted disposal of electronic waste may do harm on public health and

the quality of environment.

• As stated on the gift box and labeled on the product, reading the “User manual”

is highly recommended for the benefit of the user. This product must however

not be thrown in general rubbish collection points.

• The manufacturer and supplier cannot accept any responsibility for any

incorrect readings and any consequences that occur should an inaccurate

reading take place.

• This product is designed for use in the home only as indication of the

temperature.

• This product is not to be used for medical purposes or for public information.

• The specifications of this product may change without prior notice.

• This product is not a toy. Keep out of the reach of children.

• No part of this manual may be reproduced without written authorization of the

manufacturer.

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 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

190 Main Street

La Crescent, MN 55947

Phone: 507.895.7095

Fax: 507.895.2820

e-mail:

support@lacrossetechnology.com

(warranty work)

sales@lacrossetechnology.com

(information on other products)

web:

www.lacrossetechnology.com

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.

FCC ID: OMO-TX21U (transmitter)

FCC DISCLAIMER

RFExposure mobil:

The internal / external antennas used for this mobile transmitter 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 transmitter."

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

La Crosse Technology TX21U Thermo-hygro Transmitter User Manual tx22u manual

La Crosse Technology Ltd. Thermo-hygro Transmitter tx22u manual

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