LSI LASTEM M-Log – User’s manual
13
All sensors generating current signals and all powered sensors can be connected to single-ended
inputs (see connection scheme).
WARNING:
To R/M Log instruments it is possible to connect only: radiometers, thermo-couples, fluxmeters or
signals externally powered (see connection scheme)
Sensors with analogue signal (single-ended mode):
A
B
C
D
Voltage signal from externally
powered sensor
A
B
C
D
Current signal from externally
powered probe
Rx
+
+
+
a
b
Rx
+
a
b
The drop resistance, indicated by Rx, is used to return a voltage signal from the current generated
by the sensor. Program 3DOM supplies a library for the setting of the LSI LASTEM sensors,
including some powered outputs; for such models the settings have been arranged to use the
energized scale -300÷1200 mV, thus being able to use 50 Ω drop resistances.
When a probe is added using the 3DOM probes library, those sensors are always added in
differential mode; for this reason is not possible add a single-ended probe to a configuration where
there is only one single-ended sensor free; when this situation occurs set the measure parameters
manually matching the single-ended probe needs; otherwise change, if possible, different measures
from differential to single-ended mode until obtaining a complete differential input free (two single-
ended sequential inputs).
3.3.5
Serial communication lines
All the M-Log dataloggers are equipped, on the upper panel, at least with one communication serial
port (furnished with douple connector, DTE and DCE; female if the datalogger is used as a DCE
device, male if it is used as a DTE device); ELO008 and ELO009 have another communication
serial port (only in DTE mode). Serial port are used to program the instrument's operative modes
and data download, by means of the LSI CISS communication protocol.
The serial port leaves our factory with the following default configuration:
Baud rate: 57600 bps;
Data bit: 8;
Stop bit: 1;
Parity: none;
Network address: 1.
