User manual

15
3. Transmission losses
Sometimes transmission losses may arise, indicated by missing
temperature data in the sensor’s curve display.
Data losses may be caused by:
1. Problems inside the USB, LAN, WIFI, GPRS-receiver
2. Problems in the temperature sensor module
3. Problems in the signal transfer between temperature sensor
module and USB, LAN, WIFI, GPRS-receiver
3.1. Problems inside the USB, LAN, WIFI, GPRS-receiver
The receiver does not registrate a single data signal, even if the sensor
is located at a minimum distance to the receiver.
Potential problems:
- USB-cable between receiver and computer is missing or defect.
- Improper installation of the USB, LAN, WIFI, GPRS-module.
- Unknown software problem in the computer system.
Suggested solutions:
- Check the display window in the temperature logger display
 foraeldinthelowerleftarea.Theeldistodisplaythevalue
‘ready’ continously. If the display intermittently displays
‘RF_USB-Communication failure’,
the Windows operating system
 failedtondtheUSB-module.
- Remove the USB-cable,
wait about ten seconds and
reconnect the cable.
- Deinstall the temperature logger
application software and
reinstall it again.
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Fig.11.Repeaterconguration
Congurationexamplewithseveral
repeater stations for a longer range