Delta OHM HD33[L]M.GSM, Operating Manual

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HD33[L]M.GSM
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V1.10
1 INTRODUCTION
The HD33[L]M.GSM data logger allows several physical quantities to be monitored in a large
variety of application fields:
• Temperature
• Relative humidity
• Atmospheric pressure
• Solar radiation
• Rainfall quantity
• Wind speed and direction
It has 5 inputs:
• One input for relative humidity and temperature with NTC sensor combined probe or,
alternatively, for temperature only probe with NTC sensor.
• One input for pyranometer.
• One input for rain gauge.
• One input for cup anemometer.
• One input for wind direction vane.
It detects the atmospheric pressure by means of an optional internal sensor.
If a relative humidity and temperature probe is connected, the dew point temperature is
calculated.
Only one probe of each type can be connected. The probes are connected through M12
connectors.
On request, one of the inputs can be replaced by a 4…20 mA analog input for the connection of
a transmitter with current output, this allows the monitoring capability to be extended to many
other quantities in addition to the ones mentioned above (for example, a level sensor can be
connected).
Thanks to GSM/GPRS transmission, the user will not have to remove the data logger from its
position or reach the place where the data logger is installed to download the data measured
with the PC: the instrument can send the data via e-mail or FTP and can upload the data on
an HTTP server (for example the Delta OHM portal “ www.deltaohm.cloud ”). You can also
make a direct GPRS TCP/IP connection with a remote PC which has an Internet connection.
The data logger GSM functions can be remotely controlled by sending SMS messages.
For each detected quantity, the user can set two alarm thresholds (high threshold and low
threshold), the alarm hysteresis and a delay in the generation of the alarm. The overrun of the
thresholds can be indicated by an audible signal of the data logger through an internal buzzer or
signaled by alarm e-mails or SMS messages.
HD35AP-S PC software, downloadable free of charge from the Delta OHM website, allows
configuration of data logger, displaying measurements in real time both in graphical and
numerical format, data download. The data transferred to the PC are entered into a database.
The data logger operates with 7…30 Vdc direct power supply voltage and can be powered by a
solar panel through an appropriate
optional power supply unit.
IP 67 waterproof housing.
Optional custom LCD display.