TFA_No. 35.1145_Anleitung_12_20
LARGO – Wireless weather station
C: Housing (Fig. 2):
C 1:
Battery compartment
5.2 Transmitter (Fig. 3):
D 1:
LED signal lamp
D 3:
Battery compartment
D 5:
TX button
6. Getting started
6.1 Insert the batteries
• Place the base station and the transmitter on a table at a distance of about 1.5 meters from each
other. Avoid being close to possible sources of interference such as electronic devices and radio
equipment.
• Open the transmitter's battery compartment.
• Insert two new AA 1,5 V batteries, polarity as illustrated.
• Close the battery compartment carefully.
• Open the base station battery compartment and insert three new AA 1.5V batteries. Make sure
the polarity is correct. The device will alert you with a beep and all segments will be displayed
for a short moment. Close the battery compartment again.
• The indoor temperature and humidity appear on the base station display.
6.2 Outdoor values reception
• The base station will scan the outdoor values of the transmitter. The reception symbol flashes. If the
reception is successful, the outdoor temperature and humidity appear on the base station display.
• If the reception of the outdoor values fails, "- -" appears on the base station display. Check the
batteries and try it again. Check if there is any source of interference.
• As soon as the base station receives the radio-controlled time, you can start the manual initial-
ization of the transmitter. Press and hold the CH button on the base station for two seconds. The
registered transmitter (channel) will be canceled.
• Press the TX button in the transmitter's battery compartment. The transmission of the outdoor
data takes place immediately and a successful reception will be confirmed by a beep tone of the
base station.
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9:12 Uhr
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C 2:
Stand
D 2:
Wall mounting hole
D 4:
Channel switch 1, 2, 3
LARGO – Wireless weather station
6.3 Radio-controlled time reception
• Three minutes after the base station has completed the search for the transmitter, the device
starts scanning the DCF signal (radio signal) and the DCF reception symbol flashes.
• When the time code is successfully received after 3-12 minutes, the radio-controlled time, the
date and the DCF symbol will be shown steadily on the display.
• You can also start the initialization manually.
• Press and hold the + and – button at the same time.
• The DCF reception symbol will be flashing.
• The DCF reception always takes place hourly between 1:00 and 5:00 o'clock in the morning. If
the reception is not successfully received until 5:00 o'clock, the next DCF reception attempt will
happen at 1:00 o'clock in the following morning.
• If the clock cannot detect the DCF-signal (e.g. due to interference, transmitting distance, etc.),
the time can be set manually. The DCF reception symbol disappears and the clock will then work
as a normal quartz clock (see: Manual settings).
• There are 4 different reception symbols:
Radio waves are flashing - reception is active
Radio waves stop flashing - reception is successful
Transmission tower - no DCF reception
No symbol - time is set manually
6.4 Note on radio-controlled time
The time base for the radio-controlled time is a caesium atomic clock operated by the Physikalisch
Technische Bundesanstalt based in Braunschweig (Brunswick), Germany. It has a time deviation of
less than one second in one million years. The time is coded and transmitted from Mainflingen near
Frankfurt via the frequency signal DCF-77 (77.5 kHz) and has a transmitting range of approximately
1,500 km. The adjustment to Daylight Saving Time (summer/winter time) is automatic. In Daylight
Saving Time DST is shown on the display. The reception quality depends mainly on geographic loca-
tion. Normally there should be no reception problems within a 1,500 km radius around Frankfurt.
Therefore, please note the following steps:
• The recommended distance to any interfering sources like computer screens or TV sets is at least
1.5 - 2 meters.
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