TFA 30.3029 Manual Del Usuario página 115

4. The outdoor temperature from the first transmitter (channel 1) should then be
displayed on the Temperature station. Also, the signal reception icon will be
displayed. If this does not happen after 2 minutes, the batteries will need to
be removed from both units and reset from step 1.
5. Insert the batteries to the second transmitter as soon as the outdoor
temperature readings from the first transmitter are displayed on the
temperature station.
Note: User shall insert the batteries into the second transmitter within 10 seconds
of reception of the first transmitter.
6. The outdoor temperature from the second transmitter and the "channel 2"
icon should then be displayed on the Temperature 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.
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