HD 32MT.1
The instrument can be connected to all common sensors used in industrial and environmental to the instrument, with both analog output and digital output.
The typical sensors that can be connected to the instrument are:
t sensors with analog voltage output, both unipolar and bipolar;
t sensors with analog current output (0…20mA, 4…20mA);
t temperature sensors thermocouple (type K, J, T, N, R, S, B, E);
t Pt100/Pt1000 and NTC temperature sensors;
t sensors with digital output TTL level pulse (ON/OFF);
t sensors with open/close contact output (e.g. rain gauges, cup anemometers);
The data logger is also equipped with a RS485 port specifically designed for connection of
the anemometers Delta Ohm HD2003 and HD52.3D series.
There are potential-free contact alarm outputs and digital alarm outputs. The outputs are activated if the values measured by sensors connected to data loggers exceed the programmed
The instrument is particularly suitable for use in weather stations, for the detection and
remote transmission of climatic variables. Delta Ohm manufactures a wide range of sensors
for measuring environmental variables that can be connected to the data logger, including
sensors for measuring temperature, humidity, barometric pressure, wind speed, solar radiation, amount of rainfall, etc.
The data logger can be supplied with a program of measures and stores pre-installed according to specifications of the customer, in order to be operational immediately after installation of the system. The program is installed directly from Delta Ohm to meet the required
specifications when ordering.
The system can also be powered by a solar panel and battery of adequate capacity, allowing
for installation in remote sites without electrical power.
An internal lithium battery keeps the date and time of the instrument in the absence of external power.
Case material
Operating conditions
Storage temperature
Power Supply
Data acquisition interval from
Data logging interval
Storage capacity
HD 32MT.1
The HD32MT.1 is a 16-channel data logger capable of capturing and logging the values
measured by a series of sensors connected to its inputs.
The data logger is completely programmable by the user and is therefore very versatile. The
supplied HD32MTLogger application software, supplied with the instrument, allows simple
and intuitive programming by using graphic interfaces, without the need of learning any programming language, thus minimizing the time needed to make the system operational.
The values recorded by the instrument can be transferred to a PC by using the HD32MTLogger software. The data logger can be configured to memorize the instant value, the minimum
value, the maximum value, the average value and the standard deviation of the measurements. For measurements that require the counting of pulses, the total counted pulses can
be stored.
Different acquisition/recording intervals can be programmed per each input. Each recording
includes acquisition date and time
The data logger has a “flash” internal memory arranged in circular mode: when the memory
is full the new data overwrite the older ones. The number of storable measurements depends
on the number of sensors employed on the type of measurement and the simultaneous
acquisition by the sensors, or on the acquisition on different moments. For example, with 8
sensors capturing at the same instant you can store 100,000 records, each one composed of
8 instantaneous measurements.
Data can also be directly recorded to a removable SD-type memory card with a capacity of
2 GB. The use of a memory card allows extending the memory capacity of the instrument,
allowing not to loose the data when the memory is full.
We have two versions of the data logger, according to the possibility of communication with
the PC:
t Basic version: the communication with the PC for data transfer or programming is done
via cable connection.
t Version with Radio Modem option: in addition to the direct cable connection to your
PC, you can transfer the data and programming by VHF radio using optional external radio
Both versions can be equipped with an optional GSM module to be connected externally to
the instrument, through which you can send SMS alarm messages to cell phones and send
the recorded data by e-mail or to an FTP address.
Number of samples that can
be stored
Analog inputs
Digital input/output ports (I/O)
Inputs for high frequency pulse
Inputs for number of potential-free contact opening/closing counting
RS485 connection
RS232 connection
Alarm outputs
Auxiliary supply outputs
222x140x63 mm
About 1 kg
Coated aluminium
-20 … 50°C, 0 … 85% RH no condensation
-25 … 65°C
12 … 30 Vdc
40mA @ 12 Vdc
Programmable from 1 to 60 seconds
Programmable from 2 seconds to 24 hours
4 MB internal memory
SD memory card reader up to 2 GB
The storage of a record consisting of N values requires (4
x N) bytes of memory plus 8 bytes for the date and time.
8 channels, each channel can be used as a differential
input or alternatively as 2 single-ended inputs.
Measurement ranges:
±25mV, ±100mV, ±1000mV, ±2500mV
Resolution: 16 bit, Accuracy: 0.01% f.s.
Input impedance: 100Mohm
8 ports, each configurable as an input for connecting a
sensor or alarm output.
TTL logic levels (0 Vin<0.8V, 1 Vin>3V)
Max. input voltage: 5.5 V
2 inputs
Frequency of pulses 50kHz max.
TTL logic levels (0 Vin<0.8V, 1 Vin>3V)
Minimum pulse duration 10 µs
2 insulated inputs
Switch frequency 50Hz max.
Minimum opening or closing time 10 ms
1 RS485 port for connection of anemometers HD2003 and
HD52.3D… series
2 RS232 ports, one for connection to PC or to optional
Radio Modem and one for connection to optional GSM
Sub-D 9-pole male connectors
2 insulated voltage-free contact outputs
Contact: max. 1A @ 30Vdc resistive load
You can configure the single digital I/O ports as alarm
+5V regulated, max. 500 mA
+Vsw (switched): with same value of the power input, it is
active only during acquisition of measurements
Environmental Analysis
Environmental Analysis
Technical characteristics
1. PWR input,power supply 12…30Vdc.
2. Switched Power Output +Vsw. It has a value equal to the input of power, but is active only
during the acquisition phase of the measures.
3. Regulated power supply output +5V.
4. Inputs for analog signals. They are divided into 8 channels corresponding to 8 differential
inputs (BIP channels) or 16 single-line inputs (UNI channels). The differential input number
is indicated in white on the left of the terminals.
Each channel consists of four terminals:
Terminal E (*): Excitation voltage. Used only in certain measurement configurations.
Terminal H:
If the channel is used as a differential input, corresponds to the
connection “+” input signal.
If the channel is used for single-line inputs, corresponds to the
connection “+” input signal of the single-line channel whose number is
indicated in yellow on the left side of the terminal.
Terminal L:
If the channel is used as a differential input, corresponds to the
connection “-” input signal.
If the channel is used for single-line inputs, corresponds to the connection “+” input
signal of the single-line channel whose number is indicated in yellow on
the left side of the terminal.
Terminal G:
Analog ground. It is at the same potential power of the mass.
If the channel is used for single-line inputs, corresponds to the
connection “-” input signal.
5. Terminal for connecting protective earth.
6. Channel Input / Output Digital. There are 8 channels that can be used as inputs for
connecting sensors with digital output ON / OFF, or as alarm outputs.
7. Not used.
8. PULSE inputs for counting high frequency pulses. There are two inputs, marked P1 and P2.
9. SW IN isolated inputs for counting the number of closures / openings contacts. There are
two inputs, marked 1 and 2.
10. Dry contact alarm outputs. There are two exits, marked 1 and 2.
11. RS485 serial port dedicated specifically to the connection of Delta Ohm anemometers
series HD2003 and HD52.3D.
The connection to the RS485 port of anemometers other than indicated airspeed may
not work properly due to a different communication protocol.
12. Memory Card Reader.
13. PC COM RS232 serial port for direct connection to PC or to connect the radio modem
option (only for version Radio Modem).
14. AUX COM RS232 serial port for connecting the optional GSM module.
(*) The letter E is followed by channel number (E1, E2, E3, etc..). For simplicity, this manual
uses only the letter E to indicate the excitation of a generic terminal channel. The actual
number of terminals to be used will be indicated by the diagram of connection depending
on the required connection.
HD 32.35FP
Environmental Analysis
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