Delta OHM HD32MT.3, Руководство по эксплуатации, Страница: 7 / 62

HD32MT.3
- 7 -
V1.2
2 TECHNICAL CHARACTERISTICS
Power supply 17…26 Vdc
Optional external 100…240 Vac / 24 Vdc power supply unit
(HD32MT.SWD) available.
Absorbed power 20 mA @ 18 Vdc (data logger only, sensors excluded)
Internal battery 12 V / 7 Ah (system powered by mains – HD32MT.3K) or 18 Ah (sys-
tem powered by solar panel – HD32MT.3K1). The autonomy de-
pends on the number and type of sensors connected. For exam-
ple, with the three sensors HD52.3D, HD98717TVS and HD3910.1
connected, the autonomy is about 13 days with 18 Ah battery, consid-
ering a fully charged battery and sending data via FTP every hour.
Data acquisition interval
from sensors
1 second (10 seconds for the SDI-12 sensors)
Data storage interval 10 s, 1 min, 2 min, 5 min, 10 min
Storage capacity Internal EEPROM memory and SD-type memory card.
The recording duration depends on the number and type of acquired
quantities and from the capacity of the used SD card. For example, if
20 quantities are logged in a 4 GB SD card with the minimum stor-
age interval of 10 seconds, about 8 years are needed to fill the
memory.
Inputs of sensors 1 RS485 port for the connection of MODBUS-RTU protocol sensors
1 SDI-12 port (up to 4 sensors; up to 8 measures for each sensor)
1 potential-free contact input for the connection of a rain gauge
1 potential-free contact or sinusoidal signal input for the connection
of a cup anemometer
1 potentiometric input for the connection of a wind vane for the
measurement of wind direction
3 configurable analog inputs 0…1 V, 0…10 V, 0…20 mA or 4…20 mA
Analog inputs resolution 12 bit
Display 4-line dot matrix LCD
Connection to PC 1 USB port (HID type) with B-type connector
1 auxiliary communication port with terminal block connection
Alarm output 1 potential-free contact isolated output
Contact: normally open, max 300 mA @ 30 Vdc resistive charge
Switched power outputs 2 outputs whose value is equal to the power input, activated dur-
ing the measurement acquisition phase.
A third output is used for powering the optional GSM/UMTS.
Operational conditions -20 … 50 °C, 0 … 85% RH non-condensing
Storage temperature -25 … 65 °C
Materials Hot-pressed, fiber glass reinforced polyester case. Protection shield
against solar radiation in powder-coated anodized aluminum.
Case dimensions 355x260x200 mm (anti-radiation shield included).
Weight About 7 kg
Case protection degree IP 66
Case certifications In compliance with UL/CSA/AS