Arexx Pro Mode D'emploi page 17

The Multilogger System consists of a Logger Software application, a
USB- or LAN or receiver module and one or more sensors, each inclu-
ding a transmitter system.
A USB- or LAN cable connects the receiver to the computersystem or
to the LAN network. The Logger application can synchronize the sen-
sor data from several receivers.
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For the Multilogger system many different sensors are already availa-
ble. The sensors can measure temperature, humidity and CO2
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The Multilogger application at the computer displays all sensor data,
which have been transferred by temperature sensors to the receiver.
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Temperature sensors continuously registrate temperature and report
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new values to the USB-receiver at intervalls of ca. 45 seconds.
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Each sensor in the sensorlist reports the date and time stamp for the
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most recent measurement data set. The right side window displays a
continuous curve for the registrated temperature for the selected sen-
sor.
Sensors and receiver use a wireless communication system, working
at 433MHz. This frequency is freely available for communication at
transmitting powers under 10 milliwatts.
Depending on surrounding building constructions, the allowed 10mW
power level allows a transmission range of 20-40 meters inside
buildings, the open field range is much higher.
Temperature sensors may be located inside or outside buildings, at any
place where a registrated overview of temperature curves is desired.
Unreliable signal levels may be improved substantially by slightly
modifying the sensor's position or the receiver's location.
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