8. The default SDI-12 address for the sensor is 0. Change the sensor address if you will have
more than one SDI-12 sensor on the same terminal with the
aAb!
command, where a is
the current sensor address and b is the desired address. The sensor will respond with the
new address if it was successfully changed.
Command: 0A1!
Response: 1
9. The default measurement units for the CS475A are English with stage and distance both
being returned in feet. If you want the sensor to measure in metric units, you will need to
change the units. Change the measurement units with
aXWSU=1!
(where feet = 0, meters
= 1, and user defined = 2). See step 10 for more information on user-defined units.
Command: 0XWSU=1!
Response: 00022
Command: 0D0!
Response: 0+1+0
The sensor response to the
0D0!
includes the sensor address (0) + system units (1) + error
code (0).
10. If the user wants units other than feet or meters, and has set the units = option 2. The next
step is to issue the
aXWSS=xx.xx!
command to accommodate other units. The value
entered using this command scales the radar units from Feet to the desired unit of
measure. For example,
aXWSS=12.00!
will scale the radar readings to inches.
11. Set the Power Mode of the sensor. The default power mode is normal and has a numeric
code of 1. Low power mode turns off the processor of the sensor in between measurements
consuming significantly less power. However, it will take longer to respond to each
measurement command since it will power down after a measurement is complete.
Measurement time will be a function of boot time and the integration time. To run in low
power mode, use the following command.
Command: 0XWPM=0!
Response: 00022
Command: 0D0!
Response: 0+0+0
CS475A Radar Water Level Sensor
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