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19.
Interferences and problems with operation
Problem & cause
Distance between
transmitters and re-
ceiver too long.
High shielding materi-
als between the units
(thick walls, steel, con-
crete, isolating alumi-
num foil and etc.)
Interference from other
sources (e.g. wireless
radio, headset,
speaker, etc. operating
on the same frequency)
No Reception after
adding extension ca-
bles
Reception then no
reception - loss of
transmission signal
from the sensor to the
base station
Poor contrast LCD or
no reception or low
batteries in sensors or
receiver.
Quite frequently interferences are only of a temporary nature and may
be easily overcome. If there are wireless headsets, remote babysitters
or other devices working on 433MHz in your house or in the vicinity,
their switch-on time is mostly limited. Furthermore most of these devices
allow the change to an interference-free frequency. Such measures will
effectively overcome interferences.
Remedy
Reduce distance between transmitters
and receiver to receive signal
Find a different location for sensors
and/or receiver. See also Item
'Transmission Range' below.
Find a different location for the sensors
and/or base station. Neighbors using
electrical devices operating on the
433MHz signal frequency can also
cause interference with reception
Find a new location for the sensors
and/or base station. Recommend not
adding more than 10 meter extension
cables between units to the existing
cable lengths as this will increase the
chance data reception problems.
Press and hold the PLUS(+) key for 2
seconds to synchronize the base sta-
tion to the sensors for weather data
reception. If still no signal, then
change the sensor batteries and syn-
chronize the units again.
Check the LCD contrast setting or
change batteries (check low battery
indicator on the LCD)
75
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