User's Manual

Connecting the logger and installing it on-site
27
4.3 Positioning the GSM antenna
You have to observe the following instructions when positioning the GSM antenna:
• The GSM antenna must be properly connected to the logger. Make sure that the
guide on the plug fits in the groove in the GSM socket and that you feel the plug
latch in.
• Be aware that thick walls and other barriers do affect the signal strength negatively.
• If the logger is installed underground, e.g. in a pipeline shaft, the antenna should be
positioned as near as possible to the ground surface. The deeper the antenna is
positioned, the smaller is the chance of an adequate reception.
Check the GSM connectivity using the GSM test function of the SebaDataView-3
software (see page 57) right after the GSM antenna has been positioned. If no
connection can be established, a better position has to be found. If necessary, lead the
antenna out of the shaft and bury it a few centimetres under the ground surface.