➢ Mode: it indicates whether the sensor is installed indoors or outdoors. It minimizes the detection of
false events.
➢ Number of lightning for a signal: it is the number of electrical discharges required to calculate the
distance of the storm front; values greater than 1 allow the lightning sensor to ignore any discharges
generated by electrical equipment sporadically and in short time, and therefore avoid false signals.
Allowed values are: 1 (default), 5, 9 and 16.
4.1.5.4 Thermo-hygrometer RTR
The Thermo-hygrometer RTR type is used by Alpha-Log for the acquisition of the LSI LASTEM DMA672.3 and
DMA672.4 thermohygrometric sensors. It is associated with the COM4 port (§Fig. 2).
The parameters relating to the Thermo-hygrometer type are the following:
➢ Communication port: it is the serial port where the sensor is connected. It is not possible to choose
a different port than COM4.
➢ Speed: it is serial port communication speed: 19200 bps.
➢ Parity: it is the parity used in communication with the sensor: None.
➢ Stop bits: it is a parameter used in communication with the sensor: 1.
4.1.5.5 Modbus RTU Master
Watch the following video tutorials related to the topics of this chapter.
The Modbus RTU Master type is used by Alpha-Log for the acquisition of sensors with Modbus RTU protocol.
It is associated with the COM2(4) and COM3 ports (§Fig. 2) of the data logger.
Modbus RTU Master parameters type are the following:
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