User`s manual

NexSens Technology, Inc.
iSIC User‟s Manual 40
1. First make sure the only SDI-12 sensor connected to the iSIC data logger is the
SDI-12 sensor you want to change the address on.
This is to avoid accidentally changing the wrong SDI-12 sensor or changing this sensor to
an SDI-12 address that already exists.
2. Then send the “?!” command.
The sensor will return n<cr><lf> where n is a number 0-9 and represents the current
address. If a NAK is returned the sensor may not be correctly wired or correctly
operating in SDI-12 mode as the iSIC cannot communicate to it via SDI-12.
If Failed sending command is returned, click on the general tab. Make sure you can
communicate with the data logger. If not, see the data logger communication
troubleshooting sections in the iSIC manual for the corresponding data logger trying to
be connected.
3. Next send the “0I!” command.
Verify that the SDI-12 sensor is correctly connected. Replace 0 with the current SDI-12
address if a different one was returned by ?!.
4. Then send “0A<NewAddress>!”, where <NewAddress> is a number 1 to 9 that
is not being used by any other SDI-12 sensor that will be connected to this data
logger
Change probe address from 0 to a new address. NewAddress must be from 1 to 9.
Replace 0 with the current SDI-12 address.
5. Then send “<NewAddress>I!” to verify the address change where
<NewAddress> is the address used in step 4.
Verify new address.
Note: It is recommended that the sensor is now tagged with the SDI-12 address it was
just set to make it easy to distinguish in the future