18. Changing
batteries:
Battery change only in the thermo-hygro-sensor:
1. Open the battery cover
2. Remove the old batteries and insert with new ones of the rec-
ommended type and replace the cover
Once the sensor is powered up, press and hold the PLUS (+) key for
approx. 2 seconds in the normal display mode, the base station will
sound a short beep and synchronize to the sensor otherwise no
weather data will be received.
Battery change only in the base station:
1. Connect power adaptor to base station and power outlet.
2. Open the battery cover located at the back of the base station.
3. Remove the old batteries, insert with new ones of the recom-
mended type and replace the cover
This method of battery replacement will result in no loss of MIN/MAX
and history data. However in case of possible power failure, the base
station will lose the MIX/MAX and all weather data recordings and will
need to be synchronized to the sensors again by pressing the PLUS
(+) key for 2 seconds.
Note:
When batteries require replacement for the base station, the low
battery indicator will light up on the LCD.
Please participate in the preservation of the environment
by properly disposing of all used-up batteries and accu-
mulators at designated disposal points. Never dispose of
batteries in a fire as this may cause explosion, risk of fire
or leakage of dangerous chemicals and fumes
19.
Interferences and problems with operation
Problem & cause
Remedy
Distance between
transmitters and re-
ceiver too long.
Reduce distance between transmitters
and receiver to receive signal
High shielding materi-
als between the units
(thick walls, steel, con-
crete, isolating alumi-
num foil and etc.)
Find a different location for sensors
and/or receiver. See also Item ‘Trans-
mission Range’ below.
Interference from other
sources (e.g. wireless
radio, headset,
speaker, etc. operating
on the same frequency)
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
No Reception after
adding extension ca-
bles
Find a new location for the sensors
and/or base station. Recommend not
adding more than 32ft extension ca-
bles between units to the existing
cable lengths, as this will increase the
chance of data reception problems.
Reception then no
reception - loss of
transmission signal
from the sensor to the
base station
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.
Poor contrast LCD or
no reception or low
batteries in sensors or
receiver.
Check the LCD contrast setting or
change batteries (check low battery
indicator on the LCD)
Quite frequently interferences are only of a temporary nature and may
be easily overcome. If there are wireless headsets, remote babysit-
ters or other devices working on 433MHz in your house or in the vicin-
ity, 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.