Delta OHM HD35AP series, Руководство по эксплуатации

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HD35
- 4 -
V1.12
1 INTRODUCTION
The Delta OHM wireless data logging system allows several physical quantities to be monitored
in a large variety of application fields. Data loggers are available for the monitoring of:
•
Temperature
• Humidity
•
Atmospheric pressure
•
Differential pressure
• Luminance (lux)
•
UVA, UVB and UVC irradiance
• Carbon monoxide (CO)
• Carbon dioxide (CO
2
)
•
Solar radiation
• Rainfall quantity
•
Wind speed and direction
•
Leaf wetness
• Soil volumetric water content
•
Level
• WBGT index
The models that measure relative humidity and temperature calculate humidity derived quanti-
ties. Calculated quantities depend on the model and can be: dew point temperature, wet bulb
temperature, absolute humidity, mixing ratio, partial vapor pressure.
Data loggers provided with built-in sensors and data loggers with external probes are availa-
ble. They can be connected through M12 connectors or terminals according to the model. The
data loggers with terminal header input can be connected to:
• Transmitters with 0÷20 or 4÷20 mA current output and 0÷50 mV, 0÷1 V or 0÷10 V volt-
age output (Note: 0÷10 V only for HD35EDWH)
• Pt100 / Pt1000 temperature sensors and K, J, T, N, E thermocouples
• Voltage-free contact output (commutations counting) or potentiometric sensors
This allows the monitoring capability of the system to be extended to many other quantities in
addition to the ones mentioned above.
For each detected quantity, the user can set two alarm thresholds (high threshold and low thresh-
old). The alarm hysteresis and delay can be configured for each quantity. The overrun of the
thresholds can be indicated by an audible signal of the data logger through an internal buzzer; the
alarm signal is immediately transmitted to the base unit and displayed on the PC. A wireless re-
mote alarm module with relay output is available allowing other signaling devices (sirens, flashing
lights…) or actuators to be activated. If the system is equipped with a GMS/3G module, the alarm
can be signaled also by e-mails or SMS messages.
Systems with the following transmission frequencies are available: 868 MHz (in compliance
with ETSI EN 300 220 European Directive), 902-928 MHz (in compliance with U.S. FCC part
15 section 247 and I.C. RSS-210 Directives) and 915,9-929,7 MHz (in compliance with ARIB
STD-T108 standard).
Thanks to wireless transmission, the installation of the system is a very simple and quick oper-
ation. In addition, 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 correctness of the transmitted data is ensured by the bidirectional communication be-
tween the base unit and the remote data loggers.
HD35AP-S basic PC software, downloadable free of charge from the Delta OHM website, al-
lows configuration of all system devices, display of connection status, level of the RF signal and