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Product information Wireless data loggers
Radio frequency transmission in wireless systems
In the case of wireless connections, the acquisition system is made of a radiofrequency transmitting part and a radiofrequency receiving
part:
- Transmitting part: positioned near the sensor, it transmits the measured values to the receiving part. The transmitter part is normally inte-
grated in the measuring instrument to which the sensor is connected.
- Receiving part: positioned close to the PC, it receives the measured values and transmits them to the PC. The receiving part is usu-
ally indicated by the terms Base Unit or Access Point.
SENSOR
SENSOR
The transmitter part of the acquisition system can be unique for all the sensors or can be made of multiple transmitters, each of which
sends the measurements of some of the sensors. The receiving part of the system is the same for all sensors.
Wireless system
The basic HD35... series wireless system is made of:
- One or more devices of the series HD35ED...: the devices HD35ED... acquire the values measured by integrated or external sen-
sors connected via cable. The data are both stored in the internal memory of the device and transmitted via radio to the receiving
unit (base unit / Access Point). Most of the devices HD35ED... work with a battery and do not require power connections.
- Base Unit (Access Point) HD35AP...: it receives the measured values from all devices HD35ED... and sends them to the PC. The base
unit HD35AP... has an internal battery with limited autonomy, therefore it has to be powered externally by connecting it to a power
supply (optional) or to the USB port of the PC.
- HD35AP-S Software: once installed in a PC, it allows downloading and viewing the data, entering the data into a database and
configuring the system. The software can be downloaded free of charge from the website.
HD35RD...
Sensors and
acquisition system
with transmitting part
System configuration
The HD35... series wireless system can be fully configured
between the devices HD35ED... and the base unit HD35AP... is bi-directional, that is to say that it allows the base unit HD35AP... to transmit
to the devices HD35ED... all the changes in operating parameters generated by using the software HD35AP-S:
- The devices HD35ED... transmit the measured values to the base unit HD35AP...
HD35ED...
- The base unit HD35AP... transmits the changes in the operating parameters to the devices HD35ED...
Sensors and
acquisition system
with transmitting part
4
ACQUISITION
SYSTEM
TRANSMITTING
PART
Wireless data recording system
RF
HD35ED...
Sensors and
acquisition system with
transmitting part
Wireless data recording system
RF
HD35ED...
Sensors and
acquisition system with
ACQUISITION
SYSTEM
RF
RECEIVING
PART
HD35AP...
Receiving part
(Base Unit/Access Point)
RF
through the basic software HD35AP-S. The RF communication
HD35RE...
HD35AP...
Repeater
Receiving part
(Base Unit/Access Point)
PC
PC
PC
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