11
5. Changing the batteries
The batteries in the sensors have a life of up to three
years (alkaline batteries). They must be changed when
the respective sensor does not appear in the display
unit and there is no general and long lasting interfer-
ence of the radio path, which can usually be recognized
when there is no data transmission from other, neigh-
bouring sensors either (see Section 4 “Range and re-
ception interference”).
Batteries are changed as described in Section 3.1.
Following a battery change, the sensor is ready for
operation again after a test run in test mode (see
“Technical data”).
6. Technical data
Data transfer by radio: ............................. 433.92 MHz
Free field range: ................................................ 100 m
Data transfer cycle: ............................................ 3 min.
External temperature measurement range:
-30.0
°
C to +70.0
°
C
Temperature measurement resolution: ............. 0.1
°
C
Temperature measurement accuracy: ............
±
0.8
°
C
Relative humidity measuring range:
5 % - 95 % rel. humidity
Humidity measurement resolution: .................... 0.1 %
Humidity measurement accuracy: ......................
±
5 %
Dimensions (Ø x H): ............................... 54 x 125 mm
Distance of external sensor to mounting surface:30 mm
Battery: .............................. 2 x 1.5 V LR 6/Mignon/AA
