17
7 Installing the GSM Logger at the measurement
7.4.2
Installation procedure
Ensure that all preparatory work has been carried out: SIM card
inserted; device programmed; magnet and aerial attached.
Mount the
GSM Logger
in various test positions at the mea-
surement location. Continue until the best possible installation
position is found. If necessary, change the positions at which
the magnet and aerial are attached.
Remove the
GSM Logger
again.
Move a magnet (e.g. the magnet from another
Logger
) over
the magnetic switch on the
GSM Logger
. The LED will start
to flash twice a second.
The next two steps of the procedure must be completed within
75 s
.
Mount the
GSM Logger
at the measurement location.
Replace the manhole cover.
Wait until
at least 2 minutes
have passed since the GSM Log-
ger was activated (
maximum 10 minutes
).
Use a mobile phone to make a call to the
GSM Logger
. Dial
the number of the SIM card that was installed in the
GSM
Logger
. The
GSM Logger
will answer with a whistling sound.
A test SMS message will the be received by the mobile phone
if the network connection is functioning correctly.
The time taken for the test SMS to arrive may vary consider
-
ably, depending on the volume of traffic on the mobile phone
network. The test SMS contains information indicating the qual
-
ity of the network connection.
Number
Reception quality Comment
0
Inadequate
Check the way the Logger is
mounted and optimise position
(see Section 8.2)
1
Adequate
≥ 2
Good
