Hydro Logger H1
User manual
FIEDLER
electronics for ecology
27
ANTENNA INSTALLATION
When installing the antenna, the current GSM signal strength at the antenna
installation site can be displayed on the unit's display to optimize the final an-
tenna placement.
PROCEDURE FOR DETECTING THE GSM FIELD STRENGTH:
•
Connect the GSM antenna to the device and place it in the expected
location of the highest GSM field strength.
•
Press the button briefly to switch on the device. The following long press
(3 sec - until beep) will command the HydroLogger to try to log into the
GSM network. If there is at least the minimum GSM field strength at the
antenna location, the instrument will log into the GSM network after
approx. 20 sec. and the display will show the name of the operator and
the measured GSM field strength will be shown in ticks in the right part
of the display above the schematic mark of the antenna. The numerical
expression of the GSM field strength can be found in the upper right
corner of the display in the form Q=...
•
Manipulate the antenna to achieve a GSM field strength of at least Q = 8
or higher. The measured Q value is refreshed at an interval of about 5
seconds.
•
To extend the display on time, press the button briefly again before
exiting the recalled mode. By default, the device is set so that the display
backlight turns off after 1 minute from the last button press and the
selected mode after another minute. Therefore, if you press the
instrument button briefly at an interval of less than 1 minute, the
instrument's backlit display will continuously show the measured GSM
field strength. Any long press of the button (>=3 sec) will trigger the
archived data to be sent via GPRS communication to the database server.
•
After finding the maximum possible GSM field strength (the highest Q
value), leave the instrument at rest. Two minutes after the last button
press, the display will gradually show the set measurement channels and
then the instrument will switch off - the instrument will enter its normal
operating mode.
TREATMENT OF THE GSM CONNECTOR AGAINST MOISTURE
The used GSM connector type FME does not contain a
seal to prevent moisture from entering the connector
and therefore it is necessary to treat this connector
when installing the station in a humid environment. The
easiest way to do this is to wrap the joint with self-
vulcanizing insulating tape (in a pinch, ordinary electri-
cian's insulating tape.
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