Hydro Logger H40
User manual
FIEDLER
electronics for ecology
5
1.1.
Automatic data collection via GPRS network
The HydroLogger H40G is equipped with a GSM/GPRS data module for automatic trans-
fer of measured data from the instrument to the database on the server.
ACTIVE STATIONS SYSTEM
FIEDLER telemetry stations are characterized by long battery life and very low operating
costs with regular data transmission to the server. This has been achieved by a system
of active stations and a passive server:
▪
The server is always on and waiting for data from the individual telemetry sta-
tions, which themselves determine when the data will be transmitted to the
server.
▪
The system can receive data from multiple stations simultaneously.
▪
The GSM/GPRS modem in the station is switched on only for the time necessary
for data transfer from the station to the server - saving power of the power bat-
tery.
▪
If an extraordinary event occurs at the measurement location, the station can
immediately transmit this information to the server - the usual delay of cyclical
calling of stations by the server is eliminated.
▪
The system allows the use of operationally cheap types of tariff SIM cards with-
out a fixed IP address in the stations. The fixed IP address is usually charged
for, which increases the overall operating costs of the system.
DATA SERVER SERVICES
The data server is accessible via a standard web browser. After logging in, the user can
use the services of the data server, which include:
▪
generation of graphs and tables of measured values
▪
exports measured values for the selected period to the user's PC
▪
automatic forwarding of received data from the station to another ftp server
▪
printing of graphs and monthly reports including statistical summaries
▪
creating virtual stations that can contain differently averaged, summed or other-
wise adjusted data from different real stations in one graph
A u t o m a t i c d a t a
c o l l e c t i o n s y s t e m