Users’ Manual
ESM-12S Digital seepage monitoring system
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5 CONNECTING EPS-12S TO ESDL-30 DATALOGGER
Encardio-rite model ESDL-30 datalogger is designed to
record data from the digital sensors with SDI-12 interface
output. It can also be used with Modbus sensors with an
additional Modbus card, if specifically ordered. However,
maximum limit of Modbus sensors that can be connected to
this ESDL-30 datalogger version is seven.
The datalogger is very easy to configure. It provides data
directly in engineering units. Each reading is stamped with
date and time at which the measurement was taken. It has
a non-volatile flash memory to store up to 2 million data points. The data files from the datalogger can be
downloaded to PC using Configuration Manager Software by connecting logger with data cable or
Bluetooth.
ESDL-30 with built in GSM/GPRS modem has capability to upload data records directly to remote FTP
server. Upload schedule can be programmed in the datalogger using the software for automatic data
upload to FTP server. Schedule can be set as fast as 5 minutes.
Sensor cable can be directly terminated in the datalogger, in case datalogger is installed near monitoring
sensor. In case the datalogger is installed at a distance (control room) from seepage monitoring location,
a junction box is used to terminate sensor cable. A 3 core or 6 core bus cable is routed from junction box
to datalogger.
5.1 Wiring details for sensors with SDI-12 output
Terminate leads from sensor 3-core core cable in the junction box as shown in figure 5-1. Connection
details for cable from junction box to datalogger is also shown in figure 5-1, both for a 3 core or 6 core bus
cable.
ESDL-30 datalogger has three SDI-12 ports (channels). Sensors with SDI-12 serial interface can be
connected on a common SDI-12 bus. This bus can be connected to any SDI-12 port of the datalogger.
Connection detail is shown in figure below. Battery should be placed in the datalogger after the connections
have been successfully done.
WIRING DIAGRAM
6 core cable
+12V (Red, White)
GND (Black, Blue, Brown)
SIG (Green)
JB
Terminal tag
A
B
C
SDI-12 bus cable:
3 core cable
+12V (Red)
GND (Black)
SIG (Green)
Datalogger
ESDL-30
+12V
GND
SIG
3 core cable
Seepage
sensor
with SDI-12
JB-1-1
ESDL-30/
ESDL-30MT
3/6 core cable
C
B
A
GND
SIG
+12V
C
B
A
CH.1
Model ESDL-30 datalogger
