User`s manual

NexSens Technology, Inc.
iSIC User‟s Manual 41
2.5.2 Troubleshooting SDI-12 Sensors
If SDI-12 data is displayed as -100000 in their native units it indicates that there is SDI-12
communication problem between the data logger and the SDI-12 sensor. In this situation,
there are 3 possibilities.
1. Loose wiring between the logger and sensor
2. The sensor is not functioning correctly
3. The data logger SDI-12 interface is not functioning correctly
Loose wiring:
Verify all cable connections and wiring according the sensor interface manuals located here:
http://www.nexsens.com/support/user_manuals.htm
Make sure all connections are securely made and that the sensor is powered.
Checking whether the sensor/data logger is functioning:
In iChart, go to the Advanced | iSIC | iSIC menu. The iSIC Setup dialog box will open:
The first screen gives you the iSIC connection opens. Enter the COM port and connection method
of the desired iSIC as well as the iSIC Address. For example, if you are trying to connect to a
2100-iSIC with a modem connected to COM3, select 2100-iSIC from the connection drop down
menu, and COM3 from the COM port menu. The address will typically be „1‟ unless connecting to
a 4100-iSIC. When this information has been correctly entered, click the Connect button.