La Crosse WS7138 User manual

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WIRELESS 433MHZ WEATHER STATION
INTRODUCTION:
Congratulations on purchasing this Weather Station with wireless 433MHz, which displays
time/date, indoor/outdoor temperature and humidity, and receives up to two outdoor
temperature and humidity channels. To enjoy the full benefits of this innovative product,
please read this operating manual.
WEATHER STATION:
FEATURES:
•DCF radio-controlled clock with manual time settings option
•12/24 hour time display format
•Calendar display
•Indoor temperature display in degrees Celsius (°C) or Fahrenheit (°F)
•Outdoor temperature display in degrees Celsius (°C) or Fahrenheit (°F) (optional)
•Indoor comfort indicator icon
•Relative humidity level bar
•Relative humidity display in RH%
•Indoor MIN/MAX temperature and humidity recordings with time and date
•Outdoor MIN/MAX temperature and humidity recordings with time and date
(optional)
•Can receive up to two outdoor temperature and humidity channels (optional)
•Table standing or wall mounting (detachable table stand)
THE THERMO-HYGRO OUTDOOR TRANSMITTER (optional)
•Remote transmission of outdoor
temperature and humidity to
Weather Station by 433 MHz signals
•Wall mounting case
LCD
Display
Hanging hole
Detachable
stand
Function
Keys

SETTING UP:
Please follow these steps to ensure that your newWeather Station works correctly with the
temperature transmitter(s):
1. First, insert the batteries into the Weather station (see “How to install and replace
batteries in the Weather station”below). Once the batteries are in place, all
segments of the LCD will light up briefly. Then the indoor temperature, humidity level
bar, and the time as 0:00 will be displayed. If the indoor temperature is not displayed
after a few seconds, remove the batteries and wait for at least 30 seconds before
reinserting them.
2. Once the indoor data is displayed proceed to step 3 only if you have purchase
optional transmitter(s). If not, please proceed to step 6.
Remark: If no purchase of optional transmitter had been made, the high frequency
mode will still take place after the time, indoor temperature and humidity had been
displayed. This will take 82 seconds. If no transmitter has been detected, the high
frequency icon will not be displayed and no high frequency reception will occur
under normal condition. The Weather Station will then start receiving the DCF time
reception.
3. If you have purchase optional transmitter(s), within 82 seconds of activating the
Weather station, place the batteries into the transmitter(s) (see “How to install and
replace batteries in the Thermo-Hygro outdoor transmitter“ below).
Note: Should the total time of inserting the batteries into the transmitters take longer
than 82 seconds from the time of inserting the batteries into the Weather
Station then temperature reception problems may occur. If the temperature
is not being received, then see Checking for 433 MHz receptions, before
resetting the units (see Resetting the Weather Station below).
4. The Weather Station can take up to 2 optional remote transmitters. If you have
purchased additional transmitters, wait until the outdoor temperature has been
received from the one transmitter before activating the next transmitter. However,
ensure that you leave 10 seconds in between the reception of the last transmitter
and the set-up of the following transmitter. The Weather Station will number the
transmitters in the order of set-up, i.e. the first transmitter will have the temperature
and humidity displayed with the channel number 1 against it and so on.
5. When all the transmitters are set up, there is a testing period, during which the
display switches quickly between all the received transmitters at random, according
to which random transmission it receives. The process stops automatically when
(1) No keys are pressed after 82 seconds
(2) All the data of two channels are received
(3) Any key is pressed
6. After the high frequency reception, the remote temperature and humidity have been
received and displayed on the Weather station, the DCF-77 time code reception is
automatically started. This takes typically between 3-5 minutes in good conditions.
This time period is an excellent opportunity to locate the transmitter(s) in suitable
location(s) outdoors. In order to ensure sufficient 433 MHz transmission however,
this should under good conditions be no more than 25 meters from where the
Weather Station will be finally positioned (see notes on “Positioning” and “433
MHz Reception”).

7. If after 10 minutes, the DCF time has not been received, use the IN/OUT/SET/CH
key to manually enter a time initially. The clock will automatically attempt to receive
the DCF time at each full hour or after manual set time. When this is successful, the
received time will override the manually set time. The date is also updated with the
received time. (Please refer also to notes on “Radio controlled Time Reception”
and “Manual Time Setting”).
HOW TO INSTALL AND REPLACE BATTERIES IN THE WEATHER
STATION The Weather station uses 2 x AAA, IEC LR3, 1.5V batteries. To
install and replace the batteries, please follow the steps below:
1. Insert finger or other solid object in the space at the
bottom center of the battery compartment and lift up
to remove the cover.
2. Insert batteries observing the correct polarity (see
marking).
3. Replace compartment cover.
HOW TO INSTALL AND REPLACE BATTERIES IN THE THERMO-HYGRO
OUTDOOR TRANSMITTER (OPTIONAL)
The Thermo-Hygro Outdoor Transmitter uses 2 x AA, IEC LR6, 1.5V batteries. To install
and replace the batteries, please follow the steps below:
1. Remove the battery cover.
2. Insert the batteries, observing the correct polarity (see marking).
3. Replace the battery cover on 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 the
transmitter at start-up assigns a random security code and this code
must be received and stored by the Weather Station in the first 82
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.
FUNCTION KEYS:
The weather station has 2 functions keys:
MIN/MAX/+ key
IN/OUT/SET/CH key
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IN/OUT/SET/CH key:
•Enter manual setting modes: ºC/ºF temperature, 12/24 hour time, manual time and
calendar
•Toggle between indoor/outdoor temperature and humidity data (Outdoor data can
only be displayed if optional transmitter is purchased)
•Select outdoor transmitter (if more than 1 transmitter is used; optional)
MIN/MAX/+ key:
•Toggle between time and calendar display in normal display mode
•Toggle between MIN/MAX indoor temperature and humidity data
•Toggle between MIN/MAX outdoor temperature and humidity data (optional).
•Toggle between MIN/MAX data recorded time and date
•Change setting in manual setting modes
LCD SCREEN
The Weather Station’s LCD is divided into 3 sections, displaying humidity level in a bar
graph format, indoor/outdoor temperature and humidity, time and calendar information.
DCF-77 RADIO CONTROLLED TIME:
The time base for the radio controlled time is a Cesium Atomic Clock operated by the
Physikalisch Technische Bundesanstalt Braunschweig, which has a time deviation of less
than one second in one million years. The time is coded and transmitted from Mainflingen
near Frankfurt via frequency signal DCF-77 (77.5 kHz) and has an approximately 1,500 km
transmitting range. Your radio-controlled Weather Station receives this signal and converts
it to show the precise time in summer or wintertime.
The quality of the reception depends greatly on the geographic location. In normal cases,
there should be no reception problems within a 1500km radius of Frankfurt.
Once the outdoor temperature is displayed on the Weather station, the DCF tower icon in
the clock display will start flashing in theLCD. This indicates that the clock has detected that
Humidity level
bar graph
Indoor /outdoor
temperature in
ºC/ºF
Time
Indoor comfort
indicator icon
Indoor/outdoor relative
humidity in %
Outdoor reception
indicator
DCF Tower
Icon

there is a radio signal present and is trying to receive it. When the time code is received,
the DCF tower becomes permanently lit and the time will be displayed.
If the tower icon flashes, but does not set the time or the DCF tower does not appear at all,
then please take note of the following:
1. Recommended distance to any interfering sources like computer monitors or TV sets
is minimum of 1.5 to 2 meters.
2. Within thick concrete rooms (basements, superstructures), the received signal is
naturally weakened. In extreme cases, please place the unit close to a window and/
or point its front or back towards the Frankfurt transmitter.
3. During nighttime, the atmospheric disturbances are usually less severe and
reception is possible in most cases. A single daily reception is adequate to keep the
accuracy deviation below 1 second.
MANUAL SETTINGS
Press the “SET/CH” key about 2 seconds to enter the following manual setting modes:
1. °C/°F Temperature setting
2. 12/24 Hour Time setting
3. Manual time setting
4. Calendar setting
°C/°F TEMPERATURE DISPLAY SETTING
The temperature display can be selected to show temperature data in °C or °F. (Default °C)
1. The characters “ºC” or “ºF” will start flashing in LCD.
2. Use the “MIN/MAX/+” key to select “ºC” for temperature reading in degrees Celsius
or “ºF” for temperature reading in degrees Fahrenheit.
3. Press the “IN/OUT/SET/CH” key again to confirm and to enter the “12/24 Hour time
display setting”.
12/24 HOUR TIME DISPLAY SETTING
Flashing
Flashing

Minutes flashing
The hour display can be selected to show hours in 12-hour or 24-hour settings.
(Default 24-Hour)
1. Use the “MIN/MAX/+” key toggle between “12h” or “24h”.
2. Press again the “IN/OUT/SET/CH” key to confirm and enter the “Manual time
setting”.
MANUAL TIME SETTING
In case the Weather station is not be able to detect the DCF-signal (disturbances,
transmitting distance, etc.), the time can be manually set. The clock will then work like a
normal Quartz clock.
1. The hour digit starts flashing.
2. Use the “MIN/MAX/+” key to set the hours.
3. Press the “IN/OUT/SET/CH” key to enter the minutes. The minute digits start
flashing.
4. Press the “MIN/MAX/+” key to set the minutes.
5. Press the “IN/OUT/SET/CH” key to confirm and enter the “Calendar setting”.
Note: The unit will still try to receive the signal at each full hour and after manual set time
despite it being manually set. When it does receive the signal, it will change the manually
set time into the received time. During reception attempts the DCF tower icon will flash. If
reception has been unsuccessful, then the DCF tower icon will not appear but reception will
still be attempted the following hour.
CALENDAR SETTING
The date default of the Weather station is 1. 1. in the year 2003. 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. To do this:
1. Use the “MIN/MAX/+” key to set the year (the range runs from 2000 to 2029).
2. Press the “IN/OUT/SET/CH” key and the month digit starts flashing.
3. Use the “MIN/MAX/+” key to set the month.
4. Press the “IN/OUT/SET/CH” key again, the day digit starts flashing,
5. Use “MIN/MAX/+” key to set the day.
6. Press the “IN/OUT/SET/CH” key again to exit the manual setting mode or wait for
about 16 seconds for automatic timeout.
Year flashing
Date flashing Month flashing
Hour flashing

USING THE WEATHER STATION:
THE HUMIDITY LEVEL BAR:
Located above the temperature/humidity display, it shows the relative humidity level. The
range is from 16% to 98%, and each bar corresponds to 2% of relative humidity. It
automatically changes accordingly to the indoor/outdoor humidity display.
IN AND OUT ICONS
The icon “IN” or “OUT” will be displayed just above the temperature. “IN” represents the
indoor temperature and humidity reading, whereas “OUT” represents the outdoor
temperature and humidity reading.
Note: Should the outdoor temperature not be received within 2 minutes after inserting the
batteries into a transmitter, then see “Checking 433 MHz reception” below.
MIN/MAX INDOOR TEMPERATURE RECORDINGS:
To display the MIN/MAX indoor temperature and humidity recordings and the time/date
records, press “IN/OUT/SET/CH” key first to ensure that the LCD displays the indoor data.
1. Press the “MIN/MAX/+” key, the Weather Station shows the current date.
2. Press the “MIN/MAX/+” key a second time, the MAX indoor temperature and time
record will show (temperature record flashing).
3. Press the “MIN/MAX/+” key, the MAX indoor temperature and date record will show
(temperature record flashing).
4. Press the “MIN/MAX/+” key, the MIN indoor temperature and time record will show
(temperature record flashing).
5. Repeat pressing the same button, the MIN indoor temperature and date record will
show (temperature record flashing).
Note: The relative humidity record displayed next to the MIN/MAX temperature record is
not the MIN/MAX relative humidity record, but the relative humidity recorded at this specific
time.
MIN/MAX INDOOR HUMIDITY RECORDINGS:
MIN Indoor
temperature
flashing
MAX indoor
temperature
flashing
MIN indoor
humidity
flashing
MAX
indoor
humidity
flashing
Humidity level
bar flashing
Indoor data icon Indoor comfort indicator

1. Press the “MIN/MAX/+” key. The MAX indoor relative humidity record will show with
the time record (humidity record and humidity level bar flashing).
2. Press the “MIN/MAX/+” key, the MAX indoor relative humidity record shows with the
date record (humidity record and humidity level bar flashing).
3. Press the “MIN/MAX/+” key. The MIN indoor relative humidity record will show with
the time record (humidity record and humidity level bar flashing).
4. Press the “MIN/MAX/+” key, the MIN relative humidity record shows with the date
record (humidity record and humidity level bar flashing).
Note: The temperature displayed next to the MIN/MAX relative humidity record is not the
MIN/MAX temperature record, but the temperature recorded at that specific time.
OUTDOOR TEMPERATURE 1 AND 2 (optional)
IMPORTANT:
The following description about MIN/MAX outdoor data can only be viewed if there is
optional transmitter(s) purchased. Otherwise, no outdoor data will be displayed.
If more than one transmitter is being used, simply press the “IN/OUT/SET/CH” key to toggle
between the temperature and humidity readings of transmitter 1 and 2. If the reading is
from transmitter 1, then the channel identification number “1” will be displayed below the
outdoor temperature.
MIN/MAX OUTDOOR TEMPERATURE READING (optional)
To display MIN/MAX outdoor temperature recordings,
1. Press “IN/OUT/SET/CH” key to switch to outdoor data.
2. Choose the desired transmitter by pressing the “IN/OUT/SET/CH”’ key if more than 1
transmitter is used. Otherwise skip step 3.
Note: Once a new outdoor temperature high or low is reached, it will automatically be set
into the Weather Station’s memory. All the records are based on which transmitter is
chosen.
3. Press the “MIN/MAX/+” key, the Weather Station shows the current date.
4. Press the “MIN/MAX/+” key a second time, the MAX outdoor temperature and time
record will show (temperature record flashes).
5. Press the “MIN/MAX/+” key again, the MAX outdoor temperature and date record
will show (temperature record keep flashing).
6. Press the “MIN/MAX/+” key, the MIN outdoor temperature and time record will show
(temperature record flashes).
7. Press the “MIN/MAX/+” key, the MIN outdoor temperature and date record will show
(temperature record keep flashing).
MAX Outdoor
temperature
flashing
MIN Outdoor
temperature
flashing
Outdoor data icon

Note: The relative humidity record displayed next to the MIN/MAX temperature is not the
MIN/MAX relative humidity record, but the relative humidity recorded at this specific time.
MIN/MAX OUTDOOR HUMIDITY READING (Optional)
1. Press the “MIN/MAX/+” key. The MAX outdoor relative humidity record will show with
the time record (humidity record and humidity level bar flashing).
2. Press the “MIN/MAX/+” key a second time. The MAX outdoor relative humidity
record is showed with the date record (humidity record and humidity level bar
flashing).
3. Press the “MIN/MAX/+” key again. The MIN outdoor relative humidity record will
show with the time record (humidity record and humidity level bar flashing).
4. Press the “MIN/MAX/+” key. The MIN outdoor relative humidity record show with the
date record (humidity record and humidity level bar flashing).
Note: The temperature record displayed next to the MIN/MAX relative humidity record is
not the MIN/MAX temperature record, but the temperature recorded at this specific time.
RESETTING THE MIN/MAX TEMPERATURE AND HUMIDITY
RECORDING:
During the MIN/MAX temperature and humidity record display, pressing the
“IN/OUT/SET/CH” key will reset the displayed record to the current data.
CHECKING THE 433 MHz RECEPTION (Optional)
In normal surroundings (for example away from interfering sources such as TV sets), the
outdoor temperature can usually be easily received within 82 seconds. If the outdoor
temperature is not displayed on the LCD after 2 minutes, then check the following:
1. The distance of the units should be at least 1.5 to 2 meters away from interfering
sources such as computer monitors or TV sets.
2. Avoid placing the units onto or in the immediate proximity of metal doors, window
frames or structures.
3. Using other electrical products such as headphones and speakers that operate on
the same signal (433 MHz) can prevent the transmission pick up.
4. Neighbors using electrical products operating on the 433 MHz signal can also cause
interference. In most severe cases, the reception is only possible once all other
electrical products using the 433 MHz are switched off.
5. Within thick concrete rooms such as basements and tower blocks, the 433 MHz
signal can be weakened (avoid placing near metal frames and structures).
6. Transmission can be affected by exposure to extreme temperature conditions. For
example, if the weather has been extremely cold (under -25ºC) for an
extended period of time then the transmission signal may be weakened. (Please
bear this in mind when positioning the transmitter).
MIN Outdoor
humidity
flashing
Flashing MAX Outdoor
humidity
flashing

Note: Should after checking the above list an outdoor temperature is still not received, then
reset all the units.
THERMO-HYGRO TRANSMITTER (optional):
The temperature and humidity are measured every 1 minute and transmitted every 1
minute. The range of the Thermo-Hygro transmitter may be affected by temperature. At
cold temperatures the transmitting distance may be decreased. Please bear this in mind
when placing the transmitter.
POSITIONING THE WEATHER STATION:
The Weather Station comes complete with a detachable stand that
gives the option of table standing or wall mounting. To wall mount:
1. Fix a screw into the desired wall, leaving the head extended out
by about 5mm.
2. Using the Weather Station’s hanging hole, carefully hang it onto
the screw.
Note: Always ensures that the unit locks onto the screw head before
releasing.
POSITIONING THE OUTDOOR TEMPERATURE TRANSMITTER (optional)
The Thermo-Hygro transmitter is supplied with two screws for wall mounting. Before
securing the transmitter, ensure that the 433MHz signal (outdoor temperature and relative
humidity readings) is properly received.
The mounting surface can affect the
transmission range. If e.g. the unit is
attached to a piece of metal, it may then
either reduce or increase the transmitting
range. For this reason, we recommend not
placing the unit on any metal surfaces or in
any position where a large metal or highly
polished surface is in the immediate
proximity (garage doors, double glazing
etc.). Before securing in place, please ensure that the Weather station can receive the
signal from the Thermo-Hygro transmitter at the positions that you wish to situate them.
CARE AND MAINTENANCE:
•Avoid placing the units in areas prone to vibration and shock as these may cause
damage.
•Avoid areas where the units can be exposed to sudden changes in temperature, i.e.
direct sunlight, extreme cold and wet/moist conditions as these will lead to rapid
changes in temperature which reduces the accuracy of readings.
•When cleaning the LCD and casing, use a soft damp cloth only. Do not use solvents
or scouring agents.
•Do not submerge the units into water.
•Immediately remove all low powered batteries to avoid leakage and damage.
Replace only with new batteries of the recommended size.